Dr. Gautam Chattopadhyay, Reader
gch.chem@presidencycollegekolkata.ac.in
g_chattopadhyay2002@yahoo.co.in
Area of Specialisation: organic Chemistry 

Academic Profile
B.Sc(Calcutta), M.Sc(Calcutta), Ph.D (Calcutta)

Joined West Bengal Education Service in 1980.

Areas of Interest
• Synthetic methodology :
• Functional group interconversions.
• Heterocycles in organic synthesis-manifestation of masked    functionalisation.
• Vicarious nucleophilic substitution (VNS).
• Domino synthesis.

Research
• Ring Transformation in heterocycles : Synthetic studies on pyrazole, pyrazine, imidazo[1,5-a]pyrazines and thiazolo[ 5,4-d] pyrimidines.
• Application of ANRORC involving compounds related to aminoimidazolecarboxamide.

Research Group
Present Members
Mr. Debnath Saha

FormerMembers
Dr. Tapas Kr. Saha

Teaching
• Synthetic methodology :
• Functional group interconversions.
• Heterocycles in organic synthesis-manifestation of masked    functionalisation.
• Vicarious nucleophilic substitution (VNS).
• Domino synthesis.
• Heterocyclic Chemistry (synthesis, reactions and ring    transformations)
• Organic reaction mechanism
• Organic spectroscopy
• Modern reagents

List of Publications
A domino type one flask synthesis of 1-substituted-5-aminoimidazole-4-carboxamide and ring transformation to pyrazine under microwave through suitable aminoimidazoliumcarboxamide, G. Chattopadhyay and T.K. Saha, Indian Journal of Chemistry, 44B, 827, 2005.

Aminoimidazolium carboxamide with dimethyl formanide-dimethyl acetal : A Novel ANRORC towards rearranged imidazole anchored with one carbon fragment. G. Chattopadhyay and T.K. Saha, Indian Journal of Chemistry 43B,1558, 2004.

Exciplex emission of photoinduced energy transfer as a function of cavity dimension is naphthalene linked aza-crown ethers – M. Basu Roy, S. Samanta, G. Chattopadhyay and S. Ghosh, Journal of Luminescence, 106,141, 2004.

New Reactions of Oximinocyanoacetamides with benzylamine : A One-pot entry into isoxazole nucleus, G. Chattopadhyay and T.K. Saha; Indian Journal of Chemistry, 37B, 861, 1998.

Studies in catalytic dehydrogenation : Part X – Synthesis of alkyl-substituted spiro[4,6]undecanes and dehydrogenation of 1-ethyl-8,9-benzospiro[4,6]undecane, S. Lahiri, P. Pal, G. Chatterjee, B. Maity and P.K. Sen, Indian Journal of Chemistry, 37B, 768, 1998.

Synthesis of 2-(1,2-disubstituted)hydrazino-4-methylthiazole-5-carboxylic acids, G.Chattopadhyay and S. Lahiri; Journal of Indian Chemical Society, 75, 427, 1998.

An unexpected condensation of oximinonitriles with benzyl hydrazine-A facile route to a substituted 4,5-diaminopyrazolone, G. Chattopadhyay and T.K. Saha; Journal of Chemical Research (S)(Royal Society of Chemistry), 76, 1995.

An imidazolium azomethine ylide and an expeditions route to Imidazol(1,5-a)pyrazine, G. Chattopadhyay, S. Ray, Journal of Chemical Research (S)(Royal Society of Chemistry), 170, 1992.

Structure of 5-Amino-1-diphenylmethylimidazole-4-carboxamide, T. Banerjee, P. Roy Chowdhury, D. Chattopadhyay, S. Ray, G. Chatterjee, S. Kashino, M. Haisa, Acta Cryst. C47, 804, 1991.

An unusual imidazole to pyrazine transformation, G. Chattopadhyay and M. Chakraborty, Indian Journal of Chemistry, 28B, 1, 1990.

Studies on the effect of alkali on the compounds related to aminoimidazolium carboxamides, G. Chattopadhyay, Journal of Indian Chemical Society, 67, 509, 1990.

Oxidation of 10-methoxy-9-anthraldehyde with various oxidising agents in protic and aprotic media, P.K. Sen, S. Lahiri, G. Chattopadhyay, D. Mondal, Indian Journal of Chemistry, 28B, 978, 1989.

Synthesis of 4-hydroxy-2-methyl benzoic acid and its higher homologues, P.K. Sen, P. Pal, S. Goswami and G. Chattopadhyay, Indian Journal of Chemistry, 26B, 679, 1987.

Synthesis of thiazolo(5,4-d)pyrimidines, A.K. Sen and G. Chattopadhyay, Indian Journal of Chemistry, 18B, 307, 1979.

Synthesis of compounds related to 4(5)-aminoimidazoles-5(4)-carboxamides, A.K. Sen and G. Chattopadhyay, Indian Journal of Chemistry, 17B, 222, 1979.

Synthetic studies in the purine series : A new synthesis of theobromine and related compounds, A.K. Sen, S. Ray and G. Chattopadhyay, Indian Journal of Chemistry, 15B, 426, 1977.