Preparation of 2’-O-methyl ethers of adenosine and uridine using 2’,3’- (dibutylstannylene)-nucleosides and diazomethane . A paper presented at the Second International Conference on Synthetic Oligonucleotides in Molecular biology held in Uppsala, Sweden, August 18-24, 1985.

Nucleic acids as targets for drug design. A lecture delivered at the conference on Rational Drug Design held at National Chemical Laboratory, Pune, September 29-30, 1993.

Synthesis of specially functionalised modified nucleosides: building blocks for the preparation of non-phosphate linked antisense oligonucleot(s)ides . A lecture delivered at the Fifth National Symposium on Bioorganic Chemistry held in Kolhapur, India, February 24-25, 1995.

Modified nucleosides: potential antivirals and building blocks for the preparation of non-phosphate linked antisense oligonucleot(s)ides. A lecture delivered at the Department of Bioorganic Chemistry, Biomedical Centre, Uppsala University, Sweden, August 22, 1997.

N- and S- modified nucleosides: potential antivirals and building blocks for the preparation of non-phosphate linked antisense oligonucleot(s)ides. A lecture delivered at the Department of Bioorganic Chemistry, University of Montpellier, France, November 21, 1997.

Vinyl sulfone modified carbohydrates and nucleosides . A lecture delivered at the Seventh NOST (National Organic Symposium Trust) Symposium held in Visakhapatnam, India, September 10-13, 1998.

Nitrogen and sulfur containing nucleosides as potential antivirals. A lecture delivered at the National Symposium on “Recent Advances in Structure, Synthesis and Function of Biomolecules” held in Bose Institute, Calcutta, India, February 4-6, 1999.

Vinylsulfone-modified carbohydrates: synthesis and properties. A lecture delivered at the XIV Carbohydrate Conference held in the Department of Chemistry, Indian Institute of Technology ( Madras), Chennai, India, December 16-17, 1999.

Vinylsulfone-modified carbohydrates:synthesis and properties. A. Sanki, B. Ravindran, T. Pathak. A poster presented at the “Symposium on Emerging Trends in Organic Chemistry” held in the Department of Organic Chemistry, Indian Association for the Cultivation of Science, Calcutta, India, January 13-14, 2000.

N-Oxide mediated functionalisation of nucleosides and carbohydrates. B. Ravindran, S. Bera, T. Pathak. A poster presented at the “Symposium on Emerging Trends in Organic Chemistry” held in the Department of Organic Chemistry, Indian Association for the Cultivation of Science, Calcutta, India, January 13-14, 2000.

New aminonucleosides: synthesis and properties. A lecture delivered at the Fifth IUPAC International Symposium on Bioorganic Chemistry (ISBOC 5) held in the National Chemical Laboratory, Pune, India, January 30-February 4, 2000.

Vinylsulfone-modified carbohydrates and nucleosides: useful synthetic intermediates and potential enzyme inhibitors. A lecture delivered at the “Symposium on Bioorganic Chemsitry” held in the Indian Institute of Science, Bangalore, India, February 7-8, 2000.

Biologically relevant N-modified carbohydrates and nucleosides. A lecture delivered at the “International Symposium on Challenges in Drug Discovery and Development in the Twenty First Century” organized by Chembiotek Research International and held at Taj Bengal, Kolkata, India, March 25-26, 2002.

Syntheses and Reactions of Vinyl Sulfone-Modified Hex-2-enopyranosides and Pent-2-enofuranosides . A lecture delivered at the “National Symposium on Organic Chemistry” held in Jadavpur University, Kolkata, India, April 17, 2002.

Medicinal chemistry: An introduction. A lecture delivered at the “Refresher’s Course on Basic Aspects of Chemistry: Theories and Application” conducted by UGC-academic Staff College at Jadavpur University, Kolkata, India, January 11, 2003.

AIDS, antisense and angiogenesis driven modification of nucleosides. A lecture delivered at the “First Scientific Meeting” of the Chemical Research Society of India (Kolkata Chapter) held in Inidan Association for the Cultivation of Science, Jadavpur, Kolkata, August 1, 2003.

Vinyl Sulfone-Modified carbohydrates: recent developments. I. Das, T. Kumar Pal, T. Pathak. A poster presented at the “National Symposium on Organic Chemistry-II (NSOC-II)” held in Jadavpur University, Kolkata, India, December 17, 2003.

Studies on the structure, conformation and anomeric effects of vinyl sulfone-modified carbohydrates with added groups at C-2 position. C. G. Suresh, A. K. Sanki, T. Pathak. A poster presented in the “XXXIII National Seminar on Crystallography” held in NCL, Pune, India, January 8-10, 2004.

Towards the Design of Nucleoside-based Ribonuclease Inhibitors. T. K. Maiti, S. De, S. Dasgupta, T. Pathak. A poster presented in the “Fourth National Symposium in Chemistry” held in IIT Kharagpur, India, January 17, 2004.

Synthesis of New Vinyl Sulfone-Modified Carbohydrates and Their Reactions with N-Nucleophiles . I. Das, A. Patra, T. Pathak. A poster presented in the “Fourth National Symposium in Chemistry” held in IIT Kharagpur, India, January 17, 2004.

Effects of Steric Bulk and Protecting Groups on the Diastereoselectivity of Addition of Nucleophiles to Vinyl Sulfone-modified Carbohydrates. R. Bhattacharya, T. Pathak. A poster presented in the “Fourth National Symposium in Chemistry” held in IIT Kharagpur, India, January 17, 2004.

Synthesis of New Hexopyranosyl and Pentofuranosyl Aminonucleosides. S. G. Deshpande, G. K. Mandal, T. Pathak. A poster presented in the “Fourth National Symposium in Chemistry” held in IIT Kharagpur, India, January 17, 2004.

Easy Access to Chirally Pure 5-Aminosugars from Vinyl Sulfone-Modified Carbohydrates: A New Route to 6-Deoxynojirimycin. I. Das, T. Pathak. A poster presented in the 7 th CRSI National Symposium in Chemistry held in Indian Association for the Cultivation of Science, Jadavpur, Kolkata, February 4-6, 2005.

Steric Bulk Attached to Anomeric Carbon and Ring Conformation Control the Pattern of Addition of Amines to Vinyl Sulfone-Modified Carbohydrates. R. Bhattacharya, T. Pathak. A poster presented in the 7 th CRSI National Symposium in Chemistry held in Inidan Association for the Cultivation of Science, Jadavpur, Kolkata, February 4-6, 2005.

A New Approach to the Synthesis of 3’-Exocyclic Unsaturated Thymidine Derivatives via so 2-Extrusion Reactions . T. K. Pal, T. Pathak. A poster presented in the 7 th CRSI National Symposium in Chemistry held in Indian Association for the Cultivation of Science, Jadavpur, Kolkata, February 4-6, 2005.

Inhibition of Ribonuclease A by Aminonucleosides. T. K. Maiti, S. De, S. Dasgupta, T. Pathak. A poster presented in the 7 th CRSI National Symposium in Chemistry held in Indian Association for the Cultivation of Science, Jadavpur, Kolkata, February 4-6, 2005.

Diastereoselective Addition of Amines to Vinyl Sulfone-modified Carbohydrates: A New Route to Aminosugars. A lecture delivered at the “1 st National Conference on Chitin & Chitosan” held at the department of chemistry, Motilal Nehru National Institute of Technology, Allahabad on May 24, 2005.

Vinyl Sulfone-Modified Carbohydrates: A Versatile Group of Intermediates for the Synthesis of Amino- and Branched-Chain Sugars . A lecture delivered at the “XX Carbohydrate Conference ” held at the department of chemistry, University of Lucknow, Lucknow, November 24-26, 2005.

Vinyl Sulfone-Modified Hex-5-enofuranosyl Carbohydrates: A Versatile Group of New Chirons. I. Das, T. Pathak. A poster presented at the “National Symposium on Organic Chemistry-III (NSOC-III)” held in Jadavpur University, Kolkata, India, February 22-23, 2006.

A General Route to Isonucleosides and their Analogues from Vinyl Sulfone-modified Carbohydrates . A. K. Sanki, R. Bhattacharya, A. K. Atta , T. Pathak. A poster presented in the “Fifth National Symposium in Chemistry” held at the Department of Chemistry, IIT Kharagpur, India, February 26, 2006.

Divinyl Sulfone-Modified Carbohydrates: Synthesis and Reactions. T. K. Pal, T. Pathak.A poster presented in the “Fifth National Symposium in Chemistry” held at the Department of Chemistry, IIT Kharagpur, India, February 26, 2006.

Vinyl Sulfone-modified Carbohydrates: An Unexplored Group of Chiral Building Blocks. A lecture delivered in the “Fifth National Symposium in Chemistry” held at the Department of Chemistry, IIT Kharagpur, India, February 26, 2006.

Michael Acceptors Derived from Carbohydrates: An Expedient Route to Chiral Building Blocks . A lecture delivered in the Conference on “Recent Developments in Carbohydrate Chemistry” (CARBO-XXI) held at the Department of Chemistry, University of Delhi, India, November 26-29, 2006.

Divinyl Sulfone-Modified Carbohydrates: A New Route to Functionalisation of Monosaccharides . T. K. Pal, T. Pathak.A poster presented in the “International Symposium on Current Perspectives in Organic Chemistry” held at the Department of Organic Chemistry, IACS Kolkata, India, December 7-9, 2006.

Synthetic Modification of Carbohydrates and Nucleosides. A lecture delivered in “1 st India-Taiwan Conference on Frontiers of Organic Chemistry” held at the National Tsing Hua University, Hsinchu, Taiwan, January 7-9, 2007.

Vinyl Sulfone-modified Carbohydrates: An Unexplored Group of Chiral Building Blocks. A lecture delivered in the Departement of Molecular Pharmacochemistry, CNRS/Universite Joseph Fourier-Grenoble 1, France on June 8, 2007.

Synthetic Modification of Carbohydrates and Nucleosides. A lecture delivered in the Department of Chemistry, Universite Claude Bernard Lyon 1, France on June 19, 2007.