Prof. Laitonjam Warjeet Singh

Designation: Professor

Specialization: Synthetic organic Chemistry and Natural Products Chemistry

Contact:

Email: warjeet [AT] manipuruniv.ac.in

JRF, SRF, RA (CSIR), Commonwealth fellow

Website: http://manipuruniv.ac.in/faculty/97

HONOURS/AWARDS

  1. JRF, SRF, RA (CSIR)

  2. Commonwealth fellow

RESEARCH PAPERS

  1. L. Warjeet Singh; Myrboh, B.; Ila, H.; Junjappa, H., Partial reductive demethylation of α-ketoketene S,S-acetals with sodium borohydride and nickel chloride: A new general method for 2-methylthio-1-alkenyl ketones, Synthesis 1982, 307-309.

  2. L. Warjeet Singh; Gupta, A.K.; Ila, H.; Junjappa, HA facile synthesis of 2-amino-4-alkoxy-6-styryl- and 2-amino-4-alkoxy-6-(4-aryl-1,3-butadienyl)-pyrimidines by direct cyclocondensations, Synthesis 1984, 516-518.

  3. L. Warjeet Singh; Ila, H.; Junjappa, H., A facile synthesis of 6-amino-2-methylthio-4H-thiopyran-4-ones, Synthesis 1985, 531-533.

  4. L. Warjeet Singh; Ila, H.; Junjappa, H., A facile synthesis of 2-aryl-6-methylthio-4H-pyran-4-ones and a novel cycloaromatization reaction, Synthesis 1987, 873-875.

  5. L. Warjeet Singh; Ila, H.; Junjappa, H., Reaction of cinnamoyl and 4-phenylbutadienyl ketene dithioacetals with cyanoacetamide and synthesis of novel substituted 2(H)-pyridones, Ind. J. Chem. 1987, 26B, 607-610.

  6. L. Warjeet Singh; Ila, H.; Junjappa, H., Synthesis of novel 6-aryl-5-(bismethylthio)methyl-3-oxo-2,3-dihydropyridazines, Synthesis 1988, 89-90.

  7. L. Warjeet Singh; Ila, H.; Junjappa, H., Synthesis of base catalysed reaction of 3-bis(methylthio)methylene-4- oxo-4-aryl-butene nitriles, J. Chem. Soc. Perkin Trans.I 1988, 2365-2368.

  8. L. Warjeet Singh; Devi, N.A., Synthesis of substituted 4-oxopyrazolo[3,4-d]pyrimidin-6-thiones from 1,3-diaryl-5-ethoxymethylene-2-thiobarbituric acids, Ind. J. Chem. 1994, 33B, 1091-1092.

  9. L. Warjeet Singh; Reddy, K.R.; Ila, H.; Junjappa, H., Highly diastereoselective anionic[3+2]annulation strategy for function- alized cyclopentenes via α-oxoketene dithioacetals J. Chem. Soc. Perkin Trans. I. 1994, 2439-2442.

  10. L. Warjeet Singh; Devi, N.A., A facile synthesis of 2,3-dihydro-3,5,7-triphenyl- and 2,3-dihydro-3-phenyl-5,7-diaryl-4-oxo-pyrazolo[3,4-d]pyrimidin-6-thiones
    Ind. J. Heterocycl. Chem. 1995, 5, 139-140.

  11. L. Warjeet Singh; Devi, N.A., Synthesis of substituted 4-oxo- and substituted 2,3-dihydro-4-oxo- isoxazolo[5,4-d]-pyrimidin-6-thiones, Ind. J. Chem. 1996, 35B, 478-479.

  12. L. Warjeet Singh; Devi, N.A.; Tombisana, R.K.; Khuman, C.K., Synthesis of pyrimido[4,3-d]pyrimidines as antifungal agents, Ind. J. Heterocycl. Chem. 1998, 7, 193-196.

  13. L. Warjeet Singh; Tombisana, R.K., Synthesis of pyrazolo[3,2-c]cholest4-ene derivatives from cholesterol, Ind. J. Chem. 1999, 38B, 847-849.

  14. L. Warjeet Singh; Hobson, L.A., Stereocontrolled syntheses of 2 ; Thomas, E.
    5-disubstituted tetrahydrofurans using remote asymmetric induction, J. Arkivoc 2001, Vol. 2, part 10, U46.

  15. L. Warjeet Singh; Tombisana, R.K.; Synthesis of some A- and D-ring fused steroidal pyrazoles, isoxazoles and pyrimidines, Singh, C.B. Steroids 2002, 67, 203-209.

  16. L. Warjeet Singh; Devi, L.R.; Devi, K. B., Sterols and flavonol glycosides from Melothria purpusila, Ind. J. Chem. 2005, 44B, 1291-1294.

  17. Synthesis of fused pyrazolo-, isoxazolo-, pyrimido-, and pyrido-pyrimidines
    L. Warjeet Singh; Thokchom, H.; Devi, N.A., Canadian Journal of Chemistry 2005, 83(8), 1056-1062.

  18. L. Warjeet Singh; Singh, Ch. B., A facile synthesis of steroidal pyrazoles, isoxazoles and pyrimidines from testosterone, Ind. J. Chem. 2006, 45B, 959-966.

  19. L. Warjeet Singh; Vankar, P.S.; Tiwari, V.; Swapana, N., Antioxidant properties of some exclusive species of Zingiberaceae family of Manipur, Electronic J. Env. Agri. and Food Chem. (Spain), 2006, 1318-1322.

  20. L. Warjeet Singh, Devi, L.R., Singh, Th.S., Antifungal and phytochemical studies of Eupatorium birmanicum DC, Ind. J. Chem. 2007, 46B, 1868.

  21. Natural dye yielding plants and indigenous knowledge of dyeing in Manipur, Northeast India, L. Warjeet Singh, Lunalisa, P., Swapana, N., Ind. J. Trad. Know. 2008, 7(1), 141-147.

  22. Isolation and antimicrobial studies of the compounds isolated from the stem  bark of Ficus hispida Linn., L. Warjeet Singh, Bimola D. Asem, Asian J. Chem. 2008, 20 (8), 6027-6032.

  23. A facile indium-mediated synthesis of protected and unprotected [1-(hydroxymethyl)vinyl]alkanols, L. Warjeet Singh, Nimalini D. Moirangthem, Bhavna Thigom, Ind. J. Chem. 2009, 48B, 455-459.

  24. Chromium(III)chloride catalyzed one-pot synthesis of pyrimidine-2-thiones from arylidines and thioureas, L. Warjeet Singh, Nimalini D. Moirangthem,
    Ind. J. Chem. 2009, 48B, 1023-1026.

  25. Enantioselective direct aldol reactions catalyzed by Cd-proline complex, L. Warjeet Singh, Bhavna, Th., Med. Chem. Res. 2010, 19, S59.

  26. Synthesis of biologically active pyranopyrimidines, L. Warjeet Singh, Nimalini, M.
    Med. Chem. Res. 2010, 19, S95.

  27. Studies on chemical constituents and antioxidant activities of extracts from the roots of Smilax lanceaefolia Roxb., L. Warjeet Singh, Brajeshwari, D.K. Nat. Prod. Res. 2010, 24, 1168-1176.

  28. A new and facile synthetic approach to substituted 2-thioxoquinazolin-4-ones by the annulations of a pyridine derivative, L. Warjeet Singh, Nimalini, D.M. Beil. J. Org. Chem. 2010, 6, 1056-1060.

  29. Study on isolation and comparison of the chemical compositions of Cissus adnata Roxb. leaves and Smilax lanceaefolia Roxb. roots and their free radical scavenging activities, L. Warjeet Singh, Rajkumar, Y.S. and Brajeshwari, D.K. Int. Res. J. Pure Appl. Chem. 2011, 1, 1-13.

  30. Traditional medicinal plants of Manipur as Anti-diabetics: A Review, L. Warjeet Singh J. Med. Plants Research 2011, vol. 5(5), 677-687.

  31. A facile synthesis of 7-amino-1,3-diaryl-5-phenyl-2-thioxo-pyrano[2,3-d]pyrimidine-4(5H)-ones, L. Warjeet Singh, Nimalini, D.M. Am. Chem. Sci. J. 2011, 1(3), 58-70.

  32. Comparative study of the major components of the indigo dye obtained from Strobilanthes flaccidifolius Nees. and Indigofera tinctoria Linn., L. Warjeet Singh, Sujata, D.W. Int. J. Plant Phy. Bio. 2011, 3(7), 108-116.

  33. Biological and chemical properties of Zingiber zerumbet Smith.: A review
    Singh, L.W., Lokendrajit, N., Swapana, N., Singh, S.B., Nongalleima, Kh., Singh, C.B. Phytochem Rev 2012, 11, 113-125.

  34. Comparative study of leaves of Ficus pomifera Wall., Ficus hispida Linn. and Ficus religiosa Linn. for the biochemical contents, minerals and trace elements, L. Warjeet Singh, Sujata, D.W. Int. J. Nat. Prod. Res. 2012, 3(2), 184-188.

  35. Natural antioxidants (NAO) of plants acting as scavengers of free radicals, L. Warjeet Singh Studies on Nat. Prod. Chem. 2012, 37, 259-275.

  36. Phytoconstituents of Phlogacanthus pubinervius Nees. leaves and their free radical scavenging activities, L. Warjeet Singh, Rajkumar, Y.S. and Brajeshwari, D.K. Nat. Prod. J. 2012, 2, 287-292.

  37. Investigation of the structure-nonlinearity relationship of zederone from the rhizomes of Curcuma caesia Roxb., L. Warjeet Singh, Satyavama D. Asem, Ind. J. Chem. 2012, 51B, 1738-1742.

  38. Studies of the chemoinhibitory effects of aqueous extract of Cissus adnata Roxb. and its isolated compounds on urinary lithiasis in vitro conditions, L. Warjeet Singh, Bimola D. Asem, Ibopishak Singh Oinam, Jeena D. Thangjam, Ind. J. Pharmceu. Res. 2012, 4, 57-60.

  39. Studies on chemical constituents and the uses of the leaves of Kaempferia galangal linn., L. Warjeet Singh, J.M. Laishram, Jayshree Mutum, Ind. J. Social Sc. & Sc. 2013, 3, 24-25.

  40. Evaluative and comparative study of biochemical, trace elements and antioxidant activity of Phlogacanthus pubinervius T. Anderson and Phlogacanthus jenkinsii C. B. Clarke leaves, L. Warjeet Singh, Rajkumar, Y.S., Satyavama D. Asem., Sujata D. Wangkheirakpam, Ind. J. Nat. Prod. Resources 2013, 4, 67-72.

  41. Antioxidant activities of the rhizomes of different Zingiberaceae plants of North-East India, L. Warjeet Singh, Lokendrajit, N., Swapana, N., Singh, C.B., Asian J. Biol. Life Sc. 2013, 2, 19-22.

  42. Indium-mediated Michael addition of methyl (Z)-2-(bromomethyl)-3-phenylacrylate to arylidinemalononitriles in aqueous medium, L. Warjeet Singh, Bhavna, Th., Soniya D. Moirangthem, Org. Prep. Proc. Int. 2013, 45, 246-251.

  43. Cadmium-proline catyalyzed direct asymmetric Michael and Aldol reactions in water, L. Warjeet Singh, Bhavna, Th., Soniya D. Moirangthem, Ind. J. Chem. 2013, 52B, 929-936.

  44. Proline catyalyzed enantioselective Michael additions of unmodified ketones to arylidenes, L. Warjeet Singh, Bhavna, Th., Soniya D. Moirangthem, Nimalini, D. Moirangthem, Ind. J. Chem. 2013, 52B, 937-941.

  45. Antioxidant and antimicrobial activities of different solvent extracts of the rhizomes of Curcuma leucorrhiza Roxb., L. Warjeet Singh, Linthoingambi, W., Satyavama, D. Asem, Singh, M.S., Ind. J. Nat. Pros. Res. 2013, 4, 375-379.

  46. Polymer-supported tribromide as a new solid phase and recyclable catalyst for the synthesis of 2-(N-arylamino)benzothiazoles under solvent free microwave irradiation conditions, L. Warjeet Singh, Lokendrajit Nahakpam, Singh, B. C., J. Heterocyclic Chem. 2013, 00, 000 (published online Dec. 2013).

  47. Cd-proline complex catalyzed direct one-pot three component Mannich reaction in water medium, L. Warjeet Singh, Soniya D. Moirangthem, Bhavna Thingom, J. Adv. Chem. 2014, 7(1), 1160-1168.

  48. One-pot multicomponent synthesis of novel 2-thioxo-benzo[6,7]chromeno[2,3-d]pyrimidin-4-one derivatives using cetylpyridinium chloride, L. Warjeet Singh, Dini Ahanthem J. Adv. Chem. 2014, 7(1), 1280-1286.

  49. Isolation, identification and study of some properties of a bioactive biopolymer which crystallizes at low temperature from Ficus pomifera Wall., L. Warjeet Singh, Sujata D. Wangkheirakpam, Wangkheirakpam R.D., Chingakham, B. Singh., Dini, A.
    Ind. J. Chem. 2014, 53B, 243-247.

  50. Green synthesis of Ag nanoparticles using aqueous extract of Kaempferia galanga Linn. (Zingiberaceae) rhizomes, L. Warjeet Singh, Satyavama, D. Asem J. Adv. Chem. 2014, 7(2), 1324-1330.

  51. A simple, efficient and green procedure for Michael addition catalyzed by [C4dabco]OH ionic liquid, L. Warjeet Singh, Sanjoy Keithellakpam Chinese Chem. Lett. 2014, 25, 767-770.

  52. A new guaianolide sesquiterpene lactone from Curcuma leucorrhiza Roxb., L. Warjeet Singh, Satyavama D. Asem Nat. Prod. Res. 2014, 28 (7), 477-482.

  53. Green Synthesis of Silver Nanoparticles using Strobilanthes flaccidifolius Nees. Leaf Extract and its Antibacterial Activity, L. Warjeet Singh, Sujata D. Wangkheirakpam, Wangkheirakpam R.D., Chingakham, B. Singh, J. Adv. Chem. 2014, 8(1), 1523-1532.

  54. Comparative study of the natural dyes derived from two indigenous plants of north-eastern India on silk and cotton fabrics, L. Warjeet Singh, Lunalisa Potsangbam and Sujata D. Wangkheirakpam, Int. J. Nat. Prod. Res. 2014, 4(1), 15-18.

  55. Isolation of compounds from the aqueous methanol extract of Cissus javana DC leaves and determination of its trace element content through wet digestion, L. Warjeet Singh, Bimola D. Asem, Ibopishak Singh Oinam, Jeena Devi Thangjam, Asian J. Chem. 2014, 26 (13), 3820-3822.

  56. Cd-proline complex catalyzed direct one-pot three component Mannich reaction in water medium L. Warjeet Singh, Soniya D. Moirangthem, Bhavna Thingom J. Adv. Chem. 2014, 7(1), 1160-1168.

  57. One-pot multicomponent synthesis of novel 2-thioxo-benzo[6,7]chromeno[2,3 d]pyrimidin-4-one derivatives using cetylpyridinium chloride L. Warjeet Singh, Dini Ahanthem J. Adv. Chem. 2014, 7(1), 1280-1286.

  58. Isolation, identification and study of some properties of a bioactive biopolymer which crystallizes at low temperature from Ficus pomifera Wall. L. Warjeet Singh, Sujata D. Wangkheirakpam, Wangkheirakpam R.D., Chingakham, B. Singh., Dini, A. Ind. J. Chem. 2014, 53B, 243-247.

  59. Green synthesis of Ag nanoparticles using aqueous extract of Kaempferia galanga Linn. (Zingiberaceae) rhizomes L. Warjeet Singh, Satyavama, D. Asem J. Adv. Chem. 2014, 7(2), 1324-1330.

  60. A simple, efficient and green procedure for Michael addition catalyzed by [C4dabco]OH ionic liquid L. Warjeet Singh, Sanjoy Keithellakpam Chinese Chem. Lett. 2014, 25, 767-770.

  61. A new guaianolide sesquiterpene lactone from Curcuma leucorrhiza Roxb. L. Warjeet Singh, Satyavama D. Asem Nat. Prod. Res. 2014, 28 (7), 477-482.

  62. Green Synthesis of Silver Nanoparticles using Strobilanthes flaccidifolius Nees. Leaf Extract and its Antibacterial Activity. Warjeet Singh, Sujata D. Wangkheirakpam, Wangkheirakpam R.D., Chingakham, B. Singh J. Adv. Chem. 2014, 8(1), 1523-1532.

  63. Comparative study of the natural dyes derived from two indigenous plants of north-eastern India on silk and cotton fabrics. L. Warjeet Singh, Lunalisa Potsangbam and Sujata D. Wangkheirakpam Int. J. Nat. Prod. Res. 2014, 4(1), 15-18.

  64. Isolation of compounds from the aqueous methanol extract of Cissus javana DC leaves and determination of its trace element content through wet digestion L. Warjeet Singh, Bimola D. Asem, Ibopishak Singh Oinam, Jeena Devi Thangjam, Asian J. Chem. 2014, 26 (13), 3820-3822.

  65. Proline catyalyzed enantioselective Michael additions of unmodified ketones to arylidenes, L. Warjeet Singh, Bhavna, Th., Soniya D. Moirangthem, Nimalini, D. Moirangthem, Ind. Sc. Abstr. 2014, 50(5), 4032.

  66. Polymer?Supported Tribromide as a New Solid Phase and Recyclable Catalyst for the Synthesis of 2?(N?Arylamino)benzothiazoles Under Solvent?Free Microwave Irradiation Conditions L. Warjeet Singh, Lokendrajit Nahakpam, Brajakishor S. Chingakham, J. Het. Chem. 2015, 51(1), 267-272.

  67. Decomposition of benzoylthioureas into benzamides and thiobenzamides under solvent-free conditions using iodine–alumina as the catalyst and its mechanistic study by density functional theory, L. Warjeet Singh, Lokendrajit Nahakpam, Singh, B. C., Francis A.M. Chipem, New J. Chem. 2015, 39, 2240-2247 (DOI: 10.1039/c4nj02021a).

  68. Constituents of the leaves extracts of Crassocephalum cepridioides (Benth.), L. Warjeet Simgh, Sujata D. Wangkheirakpam, Ind. J. Chem. 2015, 54B, 439-443.

  69. Cytotoxic triterpenoids from Ficus pomifera Wall. L. Warjeet Simgh, Sujata D. Wangkheirakpam, Amey Wadawale, Surendrajit S. Leishangthem, Jitendra S. Gurumayum, Ind. J. Chem. 2015, 54B, 676-681.

  70. A simple and efficient procedure for Knoevenagel condensation catalyzed by [C4dabco]OH ionic liquid, L. Warjeet Singh, Sanjoy Keithellakpam Org. Chem. Ind. J. 2015, 11 (8), 300-304.

  71. A simple and efficient procedure for the Knoevenagel condensation catalyzed by [MeHMTA]BF4 ionic liquid, L. Warjeet Singh, Sanjoy Keithellakpam, Nimalini Moirangthem Ind. J. Chem. 2015, 54B, 1157-1161.

  72. One-pot Mannich type reaction of thiobarbituric acid, aryl aldehyde and aromatic amine in catalyzed by surfactants, L. Warjeet Singh, Dini Ahanthem Org. Chem. Ind. J. 2015, 11 (11), 385-391.

  73. Henry reaction catalyzed by recyclable [C4dabco]OH ionic liquid, L. Warjeet Singh, Sanjoy Keithellakpam Ind. J. Chem. 2016, 55B, 110-113.

  74. Biological and chemical properties of Kaempferia galanga L. – a Zingiberaceae plant, L. Warjeet Singh, Chingakham B. Singh, S. Binita Chanu, Th. Bidyababy, W. Radhapiyari Devi, S. Brojendro Singh, Kh. Nongaleima, Lokendrajit N., Swapana N. NeBIO 2013, 4, 35-41.

  75. Isolation and characterization of bioactive principles from some medicinal plants of Manipur, L. warjeet Singh, Rec. Adv. Nat. Prod. Res. 2012, 7-12.

  76. A new cyclopentane derivative from Ficus pomifera Wall. And Curcuma leucorrhiza Roxb. L. Warjeet Singh, Sujata D. Wangkheirakpam, Satyavama D. Asem, Wangkheirakpam Radhapyari, Chingakham, B. Singh, Rajkumar S. Yumnam Ind. J. Chem. 2016, 55B, 114-118.

  77. Diacetoxyiodobenzene assisted C-O bond formation via sequential acylation and deacylation process: Synthesis of benzoxazoleamides and its mechanistic studies by DFT, L. Warjeet Singh, Lokendrajit Nahakpam, Singh, B. C., Francis A.M. Chipem, Org. Biomol. Chem. 2016, 14, 7735-7745. (DOI: 10.1039/C6OB00968A).

  78. Studies on the uses of some plants for medicinal and dyeing properties, L. Warjeet Singh, Sujata D. Wangkheirakpam Int. J. Chem. 2016, 5, 93-103.

  79. A multifunctional organopotassium complex from Strobilanthes flaccidifolius Nees. L. Warjeet Singh, Wangkheirakapm Sujata, Daisy Joseph, Bimolini Ayekpam and Surendrajit Leishangthem Int. J. Chem. 2016, 5, 203-211.

  80. Determination of Phyto-nutrients and Radical Scavenging Activities of the Leaves of Phlogacanthus pubinervius, L. Warjeet Singh, Ashalata Nepram, Rajkumar S. Yumnam Int. J. Eng. Tech. Sc. Res. 2017, 4, 286-293.

  81. K2Fe(SCN)6 from Crassocephalum crepridioides (Benth.) Moore. with X-ray florescence spectrometry and X-ray powder diffractometry, L. Warjeet Singh, Wangkheirakapm Sujata Ind. J. Nat. Pdts. Res. 2017, 8(2), 1-5.

  82. Csp2-O bond formation via Nickel-Catalyzed cross-coupling reaction in Water Enabled by Micellar Catalysis, L. Warjeet Singh, Dini Ahanthem Asian J. Org. Chem. 2017, 6(10), 1492-1497.

  83. Synthesis, antimicrobial and antioxidant activities of novel 7-thioxo-4,6,7,8-tetrahydro-pyraxolo[4?,3?:5,6]pyrano[2,3-d]pyrimidin-5(1H)-ones derived by SDS catalyzed multicomponent reactions in aqueous micellar media, L. Warjeet Singh, Dini Ahanthem, M. Shyamkesho Singh Nat. Prod.J. 2018, 8, 1-11.

 

CONFERENCES/SEMINARS/ WORKSHOPS PARTICIPATED

  1. National Symposium in Organic Chemistry, Department of Organic Chemistry, University of Madras, 21st to 23rd Jan. 1984.

  2. Eight National Symposium on Organic Chemistry, UGC Special Assistance Programme on Natural Products, Department of Chemistry, University College of Science, Calcutta, March 30-31, 1984.

  3. Refresher Course in Chemistry, organized by CPDHE, Delhi University, Delhi from May 19 to June 8, 1990.

  4. The Fourth Manipur Science Congress, Manipur University, Manipur, Nov. 26-28, 1992.

  5. National Symposium on Recent Trends in Organic Chemistry, sponsored by UGC, Bhagalpur University, Bhagalpur, Nov. 1–5, 1993.

  6. National Seminar on Studies on Chemical Reactivity : Recent Trends Department of Chemistry, Gauhati University, Guwahati, Nov. 23 – 25, 1993.

  7. The Ninth Refresher Course in Chemistry, organized by State Resource Center, NEHU, Shillong, from Nov. 27 to Dec. 17, 1993.

  8. The Short-term Course on Computer, conducted by Manipur University, from June 6 to June 25, 1994.

  9. The Sixth Manipur Science Congress, Manipur University, Nov. 23-25, 1994.

  10. The Tenth International Conference on Organic Synthesis (ICOS - 10), sponsored by IUPAC, held at I.I.Sc., Bangalore, Dec. 11-16, 1994.

  11. Regional Workshop on FT – IR, RSIC, NEHU, Shillong, Sept. 11-16, 1995.

  12. Regional Workshop on FT – NMR, RSIC, NEHU, Shillong, Oct. 17-21, 1995.

  13. Indo-German Symposium on Organic Synthesis – Growing Interest with Adjacent Sciences, Indian Institute of Chemical Technology (IICT), Hydrabad, September 27-28, 1996.

  14. The Annual RSC National Symposium on Recent Trends in Organic Chemistry, March 23-26, 1998.

  15. The 12th International Conference on Organic Synthesis (ICOS–12), sponsored by IUPAC, held at Venice, Italy, June 28-July 02, 1998.

  16. The RSC Symposium on Stereoselective Synthesis, the University of Leeds, August 5-7, 1998.

  17. People’s Participation in Biodiversity Conservation, sponsored by North-Eastern Biodiversity Research Cell, NEHU, Shillong, March 4-6, 1999.

  18. The National Symposium on Highlights of Recent Chemical Research, Department of Chemistry, NEHU, Shillong, June 10-11, 1999.

  19. The Fourth National Conference of Indian Society of Chemists and Biologists on Drug Research Scenario 21st Century, Central Drug Research Institute (CDRI), Lucknow, January 28-30, 2000.

  20. The Fifth National Conference of Indian Society of Chemists and Biologists, Holiday Inn, Agra, March 24-26, 2001.

  21. Current Perspectives in Organic Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, January 24-25, 2002.

  22. The Seventh Conference of Indian Society for Chemists and Biologists, Agra University, Agra, December 26-28, 2003.

  23. IUPAC International Conference on Biodiversity and Natural Products : Chemistry and Medical Applications, Le Meridien, New Delhi, 26-31 January 2004.

  24. National Symposium on Recent Trends in Organic Chemistry and Natural Product Chemistry, Department of Chemistry, Manipur University, March 29-30, 2004.

  25. Fifteen Mid-Year Meeting” of Indian Academy of Sciences, C.V. Raman Avenue, Bangalore as Invited Teacher during 1-3 July, 2004.

  26. General Body Meeting of Chemical Research Society of India, Indian Institute of Science, Bangalore, July 2, 2004.

  27. Emerging Trends in Organic Synthesis, Indian Institute of Technology, Kanpur, September 3-4, 2004.

  28. The Seventieth Annual Meeting” of the Indian Academy of Sciences, C.V. Raman Avenue, Bangalore as Invited Teacher on 25-27 November, 2004.

  29. National Conference on Current Trends of Research in Science and Technology
    Gauhati University, Guwahati, January 28-29, 2005.

  30. The Seventh CRSI National Symposium in Chemistry, Indian Association for the Cultivation of Science, Kolkata, February 4-6, 2005.

  31. Twelfth National Conference on Surfactants, Emulsions and Bio-colloids, Department of Chemistry, Manipur University, November 09-11, 2005.

  32. International Symposium on Advances in Organic Chemistry, School of Chemical Sciences, Mahatma Gandhi University, Kottayam, Kerala, January 9-12, 2006.

  33. Second International Symposium on Green/Sustainable Chemistry, New Jersey Institute of Technology and University of Delhi at New Delhi, January 10-13, 2006.

  34. International Conference on Drug Discovery : Perspectives and Challenge, the University of Leeds, UK, February 24-26, 2006.

  35. The Tenth International Conference on Medicinal and Natural product Chemistry, RSC, the University of Oxford, 23-28 April, 2006.

  36. Environment and Biodiversity of Manipur: Issues and Concerns, organized by Manipur University Research Club, Manipur University, 24-25 February, 2007.

  37. National Workshop on Potential and Planning for Conservation and Development of Commercially important Medicinal Plants in North Eastern India, Forest Department, Govt. of Manipur, 12-13 July, 2007.

  38. Workshop on Green Chemistry”, held at NIPER, sponsored by the DST, New Delhi during 3-4 September, 2007.

  39. National Seminar on Natural Products Chemistry”, Gauhati University, Guwahati, 22-23 February, 2008.

  40. XIth Manipur Science Congress”, Manipur University, Manipur, 28-30 March, 2008.

  41. The Present Scenario of Medicinal Plants in Manipur with particular reference to Anti-Cancer Plants”, Manipur University, Manipur, 24-25 July, 2008.

  42. International Conclave on Medicinal Plants for ASEAN and BIMSTEC Countries
    Forest Department, Govt. of Manipur, 11-13 December, 2008.

  43. 12th CRSI National Symposium in Chemistry and 4th CRSI-RSC Symposium in Chemistry, Indian Institute of Chemical Technology (IICT), Hyderabad, 4-7 February, 2010.

  44. 4th International Symposium on Current Trends in Drug Discovery Research, Central Drug Research Institute (CDRI), Lucknow, 17-21 February, 2010.

  45. National Seminar on Recent Trends in Phytochemical & Phytopharmaceutical Research and Future Prospects, Gauhati University, Guwahati, 26-27 March, 2010.

  46. Invited Lecture at the “National Symposium on Recent Advances in Biotechnology”, the DBT-Institutional Biotech Hub, Department of Zoology, D.M. College of Science, during 14-16 October, 2011.

  47. Invited Lecture at the “Montreal International Biochemistry & Biophysics Forum”, University of Montreal, Quebec, Canada, 3-4 November, 2011.

  48. Invited Lecture at the “10th Indo-Italian Workshop on Chemistry and Biology of Antioxidants”, University of Rome, Rome, Italy, 9-13 November, 2011.

  49. Presented a paper on in the “3rd International Conference on Heterocyclic Chemistry”, Department of Chemistry, University of Rajasthan, Jaipur, 10-13 December, 2011.

  50. Presented a paper on in the “The Fourth Science Conclave”, Indian Institute of Information Technology, Allahabad, December, 2011.

  51. Presented a paper on in the “International Symposium on Advances in Chemical Sciences-2012”, Indian Institute of Technology, Guwahati, 30 January, 2012.

  52. Presented another paper on in the “International Symposium on Advances in Chemical Sciences-2012”, Indian Institute of Technology, Guwahati, 30 January, 2012.

  53. Participated at the “National Conference on Frontiers in Chemical Sciences”, Chemistry Department, Manipur University, March 20-21 2012.

  54. Participated at the “National Conference on Science for Shaping the Future of India”, Manipur University, 27-28 August 2012.

  55. Participated at the “International Congress on Vedanta and Science”, Manipur University, Dec. 14-15 2012.

  56. Presented an invited talk on “Isolation and characterization of bioactive principles from some medicinal plants of Manipur” at the “Recent Advances in Natural Products Research”, Mizoram University, Aizawl, 29 Nov. to 1st Dec. 2012.

  57. Delivered two lectures on “Natural Products Chemistry” during the UGC–sponsored Refresher Course in Chemistry, at Academic Staff College, M.U. 27th Feb., 2013.

  58. Presented two papers at the 16th CRSI National Symposium in Chemistry held during February 7-9, 2014 at Indian Institue of Technology, Bombay.

  59. Presented an invited talk on “Isolation and characterization of antioxidants from some selected medicinal plants” at the “Nationa Seminar on Redox Biology”, Center of Advanced Study in Life Sciences, during 28-28 March. 2014.

  60. Delivered four lectures on “Natural Products Chemistry” and “Green Chemistry” during the UGC–sponsored Refresher Course in Chemistry, at Academic Staff College, M.U. 15th July to 5th August, 2014.

  61. Presented an Invited lecture on “Natural Products as Toxic Compounds” at the National Level Workshop on “Toxicity of Medicinla Plants” held during 26-27 September 2014 at the Modern College, Manipur.

  62. Iodine-alumina as an efficient and useful catalyst for the synthesis of N-substituted 2-aminobenzothiazole under solvent free conditions, Lokendrajit Nahakpam and Warjeet s. Laitonjam presented at the 16th CRSI National Symposium in Chemistry held during February 7-9, 2014 at Indian Institue of Technology, Bombay.

  63. A simple, efficient and green procedure for Michael addition catalyzed by [C4dabco]OH ionic liquid, Sanjoy Keithellakpam and Warjeet S. Laitonjam presented at the 16th CRSI National Symposium in Chemistry held during February 7-9, 2014 at Indian Institue of Technology, Bombay.

  64. Presented an invited talk on “Newer Synthetic Methods” at the “National Symposium on Sustainable Chemistry: Frontiers & Challenges”, at the Department of Chemistry, NEHU, Shillong during 27th Feb.-1st March, 2014.

  65. Presented an invited talk on “Isolation and characterization of antioxidants from some selected medicinal plants” at the “National Seminar on Redox Biology”, Center of Advanced Study in Life Sciences, during 28-28 March, 2014.

  66. Delivered four lectures on “Natural Products Chemistry” and “Green Chemistry” during the UGC–sponsored Refresher Course in Chemistry, at Academic Staff College, M.U. 15th July to 5th August, 2014.

  67. Presented an invited talk on “Natural products as toxic compounds” at the “National level workshop on Toxicity of Medicinal Plants”, Department of Chemistry, Modern College, 26-27 September 2014.

  68. Participated as an Invittee (University Nominee) at the “Festival of Innovations” during 7-13 March 2015 at the Rashtrapati Bhavan, New Delhi.

  69. Highly efficient one-pot Mannich type reaction in presence of water catalyzed by surfactant” Dini Ahanthem and Warjeet S. laitonjam presented at the International Conference on Nascent Developments in Chemical Sciences at BITS Pilani 2015.

  70. Presented an invited talk on “Natural anti-oxidants and toxic compounds from some medicinal plants of Manipur” at the National Conference held at the NIT, Agartala during 20-21 May 2016.

  71. Presented an invited talk on “Anti-diabetic compounds from some medicinal plants of North East India” at the Second International Conference on Herbal and Traditional Medicine 2017 held at Asia Hotel, Bangkok, Thailand during 25-27 January 2017.

  72. Delivered a Key-Note address at the Three Days National Seminar of National Science Congress Association on “Science & Technology for National Development” held during 02-04 April 2017 at Manipur University.

  73. Presented an invited talk on “De Novo Advancements in Pharmaceutical Sciences” at the Tenth Asia-Pacific Pharma Conference 2017 held at Holiday Inn Atrium, Singapore during May 08-10, 2017.

  74. Delivered a Key-Note address at the “International Conference on Pharmacy and Traditional Medicine” held in Osaka, Japan from Sep 28th-30th, 2018.

BOOKS PUBLISHED

  1. Warjeet S. Laitonjam, “Energy and Environment” in Environmental Studies, published by Manipur University, 2000.

  2. Warjeet S. Laitonjam, “Natural Antioxidants (NAO) of plants acting as Scavengers of Free Radicals” in Studies in Natural Products Chemistry, edited by Atta-ur-Rahman, Vol. 37, Chapter 9, pp. 259-275, Elsevier Science Publishers, Amsterdam, 2012.

  3. Warjeet S. Laitonjam, “Isolation and characterization of bioactive principles from some medicinal plants of Manipur” in Current Topic in Redox Biology, published by McGraw Hill Education, New Delhi, 2014.

  4. Warjeet S. Laitonjam, Lokendrajit Nahakpam, “Mechanistic study on the formation of compounds from thioures” in DFT Calculations, edited by Gang Yang, INTECH Rijeka, Croatia-EU, Chapter 8, pp. 167-193, 2018.

    Patents :

  1. Novel method of separation and isolation of indirubin from Strobilanthes flaccififolus leaves No. 0695/KOL/2013 dated 20/12/2013

  2. Hair dye composition and a process for the preparation of the same: Kum as hair dye No. 0934/KOL/2014 dated 12/09/2014

RESEARCH PROJECTS UNDERTAKEN/UNDERGOING

  1. Funding Agency : CSIR, New Delhi
    Title of Project : Systematic transformations and mechanistic
    investigations on 1,3-diarylthiobarbituric acids.
    Duration : From 1/5/1993 to 30/4/1996
    Amount : Rs 3,15,000/-

  2. Funding Agency : DST, Govt. of Manipur
    Title of Project : Problems and Management of Waste Substances in Imphal town
    Duration : From 1/5/1996 to 30/4/1997
    Amount : Rs 25,000/-

  3. Funding Agency : Association of Commonwealth Universities, U.K.
    Title of Project : Synthesis of Natural Product – Pamamycin, an Antibiotic
    Duration : From 1/10/1997 to 30/9/1998
    Amount : £ 1,100 p.m.

  4. Funding Agency : DST, Govt. of Manipur
    Title of Project : Chemical Investigation of Traditional Dye Plant Kum of Manipur
    Duration : From 1/8/1999 to 31/7/2000
    Amount : Rs 25,000/-

  5. Funding Agency : CSIR, New Delhi
    Title of Project : Chemical studies on certain medicinal plants of Manipur
    Duration : From 1/6/2000 to 31/5/2003
    Amount : Rs 11,12,000/-

  6. Funding Agency : DST, New Delhi
    Title of Project : Study and Restoration of Traditional Dyes of Manipur and Elucidating the Structures of the Colourants
    Duration : From 10/04/2003 to 09/04/2006
    Amount : Rs 22.83 lacs

  7. Funding Agency : DST, New Delhi
    Title of Project : Antioxidants and Free Radical scavenging effects in extracts of Zingiberacea species exclusively found in Manipur
    Duration : From 1/04/2004 to 31/03/2006
    Amount : Rs 21.23 lacs

  8. Funding Agency : ICMR, New Delhi
    Title of Project : Screening of plants of North-east India for Anti-cancer activities, isolation, characterization and evaluation
    Duration : From 01/03/2006 to 28/02/2009
    Amount : Rs 12.39 lacs

  9. Funding Agency : CSIR, New Delhi
    Title of Project : Isolation and characterization of certain medicinal plants of Manipur having anti-diabetic properties
    Duration : From 1/5/2007 to 30/4/2010
    Amount : Rs 13,00,000/-

  10. Funding Agency: DST, New Delhi
    Title of Project: Development and commercialization of traditional KUM as Hair Dye
    Duration: From 1/7/2009 to 30/6/2012
    Amount: Rs 17,61,600/-

  11. Funding Agency : DST, New Delhi
    Title of Project : Investigation on synthesis, development and applications of metal-proline complexes as organo-catalysts for organic reactions in aqueous media
    Duration : From 1/12/2009 to 30/11/2012
    Amount : Rs 19,76,000/-

  12. Funding Agency : CSIR, New Delhi
    Title of Project : Development of new Hexamine- and DABCO-based ionic liquids as green solvents for organic reactions
    Duration : From 1/6/2011 to 31/01/2015
    Amount : Rs 15,50,000/-

  13. Funding Agency : CSIR, New Delhi

    Title of Project : Investigation on the development of newer methods for the synthesis of biologically active heterocycles under solvent free conditions

    Duration : From 01/12/2017 to 30/11/2020

    Amount : Rs 16,80,000/-

OTHER INFORMATION

  1. Selected as a Commonwealth Fellow of Association of Commonwealth Universities, London, UK and visited the University of Manchester, UK from 1-10-1997 to 30-9-1998.

  2. Visited the Department of Chemistry, NEHU, Shillong as a UGC Visiting Fellow from 15-5-1999 to 15-7-1999 and from 01-6-2000 to 15-7-2000.

  3. Visited the Department of Chemistry, Assam University, Silchar as a UGC Visiting Fellow from 24-2-2000 to 15-3-2000.

  4. Visited the Indian Institute of Chemical Biology (IICB), Kolkata as a Visiting Scientist for the Research Collaboration under NER Programme from 14th December 2001 for a period of one month.

  5. Nominated as a Visiting Scientist by the Royal Society, London to visit UK for three months (from 31st January to 5th May 2006), and visited the University of Manchester, the University of Leeds and the University of Oxford, UK.

  6. Invited Lecture at the “Montreal International Biochemistry & Biophysics Forum”, University of Montreal, Quebec, Canada, 3-4 November, 2011.

  7. Invited Lecture at the “10th Indo-Italian Workshop on Chemistry and Biology of Antioxidants”, University of Rome, Rome, Italy, 9-13 November, 2011.

  8. Member of the Inspection Teams for inspecting various Colleges, involved in confidential works for examination duties, etc.

  9. Member of Governing bodies of Gour Govind College, Standard College, Regional College, Liberal College, etc.

  10. Member of Selection Committees for Science Departments for Manipur University and North Eastern Hill university (NEHU).

  11. Member of Facility Management Committee (FMC) for the Sophisticated Analytical Instrument Facility (SAIF), NEHU, Shillong.

  12. Life Member of Chemical Research Society of India (CRSI), Bangalore.

  13. Life Member of Indian Society of Chemists and Biologists, CDRI, Lucknow.

  14. Life Member of Indian Science Congress Association (No. F 1108)

  15. Member of Indian Chemical Society, Kolkata.

  16. Reviewer of various peer-reviewed Journals, such as, Indian Journal of Chemistry Section B, Natural products Research, Canadian Journal of Chemistry, Tetrahedron Letters, Journal of Natural Products, Steroids, etc.

CONFERENCES/SEMINARS/ WORKSHOPS ORGANIZED

  1. Organized a National Symposium on “Recent Trends in Organic Chemistry and Natural Product Chemistry” as Convener, sponsored by the CSIR, New Delhi and NEC, Shillong during 29-30 March, 2004.

  2. Organised the “International Year of Chemistry”, as Convener, sponsored by the Manipur University and the Department of Chemistry, M.U.

  3. Organised the “International Year of Chemistry”, as Convener, sponsored by the UGC, New Delhi.

  4. Organized a National Symposium on “Recent Trends in Natural Products and Other Frontiers in Chemistry” as Convener, sponsored by the DST, CSIR, and UGC, New Delhi during 15-16 March, 2011.

Misc. : 17 (seventeen) research scholars are awarded for Ph. D. Degrees and 8 (eight) students are currently working.

 

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