Fellow, Indian National Science Academy (FNA), President-INSA (1999 - 2001).

Fellow of the Royal Society (FRS), London, UK.

Foreign Member, Russian Academy of Sciences (RAS), Moscow, Russia.

Fellow, Indian Academy of Sciences (FASc), Vice-President (1991 - 94).

Fellow, National Academy of Sciences (FNASc).

Fellow, Third World Academy of Sciences (TWAS), Trieste, Italy.

Fellow and Honorary Member of the World innovation Foundation (WIF).

Corresponding Member, Academie Royale des Sciences d'Outre-Mer, Belgium.

Fellow, Royal Society of Chemistry (C. Chem., FRSC), UK.

Fellow, International Union of Pure and Applied Chemistry (IUPAC).

Fellow, Indian Chemical Society.

Fellow, Andhra Pradesh Academy of Sciences.

Founding Member of Society for Scientific Values.

Shanti Swarup Bhatnagar Prize (Chemical Sciences) awarded by CSIR, 1978.

Basudev Bannerji Medal and Prize, Indian Chemical Society, 1979.

Science and Technology Award of Rajasthan Government, 1980.

Professor R. D. Desai Medal and Prize, Indian Chemical Society, 1982.

FICCI Award for outstanding work in Physical Sciences, 1983.

Indian National Science Academy - Golden Jubilee Commemoration Medal (Chem. Sc.), 1989.

Jawaharlal Nehru Birth Centenary Lectureship, INSA, 1990.

G. D. Birla Award for Excellence in Science, 1992.

Indian National Science Academy - Srinivasa Ramanujan Research Professorship, 1992 - 97.

Goyal Prize in Chemical Sciences, 1994.

Pandit Jawaharlal Nehru National Award for Excellences in Science (M. P. Gov.), 1994.

Alexander von Humboldt Research Award, Germany, 1995 (1^st award in India).

Acharya P. C. Ray Medal, Indian Chemical Society, 1995.

Doctor of Science (Honoris Causa), University d'Aix-Marseille, Marseille, France, 1996.

Dr. Y. Nayudamma Gold Medal, Andhra Pradesh Academy of Sciences, 1998.

Officer dans l'ordre des Palmes Academiques, awarded by the President of France, 1999.

P. C. Ray Memorial Award, Indian Science Congress Association, 2000.

Silver Medal, Chemical Research Society of India (CRSI), 2000.

Third World Academy of Sciences (TWAS) Medal (Chemical Sciences), 2000.

Doctor of Science (Honoris Causa), Bundelkhand University, Jhansi, 2001.

Padma Sri, Civilian Honor awarded by the President of the Republic of India, 2001.

New Millennium Plaque of Honor (Ch. Sc.), Indian Science Congress Association, 2002.

C. V. Raman Medal, Indian National Science Academy, 2003.

Mercator Professorship, Deutche Forschungsgemeinschaft (DFG), Germany, 2003 (1^st award in India).

Doctor of Science (Honoris Causa), University of Paris (VII), France, 2003.

Medal and Award in Natural Products Chemistry, Royal Society of Chemistry, London, 2003.

Lifetime Achievement Award, Indian Chemical Society, 2003.

Centenary Medal and Lectureship, Royal Society of Chemistry, London, 2005 - 2006.

Awarded "Chevalier de la Legion d'Honneur" by the President of France, 2004.

Rajyotsava Award, Government of Karnataka, 2004.

Centenary Medal and Lecturership, Royal Society of Chemistry, London, 2005.

Doctor of Science (Honoris Causa), University of Joseph Fourier, Grenoble, France, 2005.

Excellence in Science and Technology Award, Indian Science Congress Association, 2006.

Honorary Fellowship (HonFRSC), The Royal Society of Chemistry, UK, 2006.

Doctor of Science (Honoris Causa), CSJM University, Kanpur, 2007.

Trieste Science Prize in Chemical Sciences, awarded by TWAS, 2007.

G. M. Modi Innovative Science and Technology Award, 2007.

Doctor of Science (Honoris Causa), Sri Venkateswara University, Tirupati, 2007.

Board of Consulting Editors, Tetrahedron and Tetrahedron Letters, UK, 1996 -

Regional Advisory Board, Chemical Communications, Royal Society of Chemistry, 1990 - 96.

Editorial Advisory Board, Perkin Transactions 1, Royal Society of Chemistry, 1992 - 2002.

International Advisory Board, Contemporary Organic Synthesis, Royal Society of Chemistry, 1994 - 97.

Honorary Advisory Board, Synlett, VCH Publishers, 1991 -

International Advisory Board, Dictionary of Organic Compounds, 6^th Ed., Chapman and Hall, 1993 -

Editorial Board, Methods in Stereochemical Analysis (MSA), VCH Publishers, 1985 - 90.

Chairman, Editorial Board, Indian Journal Chemistry (B), 1978 -

International Editorial Board, Heterocyclic Communications, Freund Publishing, UK, 1995 -

 Editorial Board, Iranian Journal of Chemistry, Iran Chemical Society, Iran, 2001 -

 Advisory Board, Chemistry Letters, Chemical Society of Japan, Japan, 2005.

Editorial Board, Topics in Heterocyclic Chemistry, Springer-Verlag, GmbH, Germany, 2005.

Editorial Board, Central European Journal of Chemistry (CEJC), Ingenta, 2005.

Editorial Board, European Journal of Organic Chemistry, VCH Publishers, 2006.

International Advisory Board, Chemistry - An Asian Journal, Wiley-VCH, 2006 -

 Editorial Board, Mendeleev Communications, Russian Academy of Sciences - Elsevier, 2007 -

Honorary Advisory Board, ARKIVOC, Arkat Inc., USA, 2007 -

Professor R. H. Sahasrabudhey Lectures, Nagpur University, 1980.

Professor R. Venkataraman Endowment Lecture, Bombay University, 1983.

UGC National Lectures, 1984 - 85.

Professor Sukh Dev Endowment Lecture, National Chemical Laboratory, 1986.

Professor N. Venkatasubramanian Endowment Lecture, Madras University, 1986.

Professor A. B. Kulkarni Endowment Lecture, Bombay University, 1987.

CSYR Distinguished Lectures, 1989.

Bawa Kartar Singh Memorial Lecture, Punjab University, 1989.

Sir Morris Travers Memorial Lecture (1^st award), Indian Institute of Science, Bangalore, 1980.

Professor S. M. Sethna Memorial Lecture, M. S. University, Baroda, 1990.

DAE - Sir C. V. Raman Lectures, Indian Physics Association, 1992.

Sir J. C. Ghosh Memorial Lecture, Indian Institute of Technology, Kharagpur, 1993.

Dr. Y. Nayudamma Science Foundation Lecture, Central Leather Research Institute, Madras, 1994.

T. R. Seshadri Memorial Lecture, University of Delhi, Delhi. 1994.

Coochbehar Professorship Lectures, Indian Association for the Cultivation of Science, 1994.

Platinum Jubilee Lecture, Indian Science Congress, Calcutta, 1995.

S. Bhagawantam Memorial Lecture, A. P. Academy of Sciences, 1996.

Dow - Elanco Lecture, The Ohio State University, Columbus, USA, 1996.

Shanti Swaroop Bhatnagar Memorial Lecture, IICT, Hyderabad, 1998.

 Professor P. C. Dutta Memorial Lecture (1^st award), IACS, Calcutta, 2000.

Hallim Distinguished Lecture, Korean Academy of Science and Technology, Seoul, Korea, 2000.

A. V. Rama Rao Foundation Lecture, JNCASR, Bangalore, 2001.

Dr. G. S. Sidhu Memorial Lecture, Indian Institute of Chemical Technology, Hyderabad, 2002.

Betz - Dearborn - Professor C.N.R. Rao Medal Lecture, Institute of Chemical Engineers. 2002.

Professor Gurbaksh Singh Memorial Lecture, ACBR, Delhi University, 2003.

Professor K. Venkataraman Memorial Lecture, National Chemical LAboratory, Pune, 2003.

Professor K. K. Balasubramanian Endowment Lecture, Indian Institute of Technology, Madras, 2003.

Professor Y. Nayudamma Memorial Lecture, Chennai, 2003.

Sir Edward Mellanby Memorial Oration, Central Drug Research Institute, Lucknow, 2004.

Professor T. R. Govindachari Memorial Lecture (first), Madras Science Foundation, Chennai, 2004.

Acharya J. C. Bose Memorial Lecture, N. S. C. B. Open University, Kolkata, 2005.

Dr. A. V. Rama Rao Foundation Award and Lecture, Hyderabad, 2006.

Royal Society of Canada - Indian National Science Academy Lecture (first award), Canada, 2006.

Distinguished Lecture, Indian Institute of Technology, Kanpur, 2006.

Professor U. R. Ghatak Memorial Lecture Award and Medal (first award), IACS, Kolkata, 2006.

Dr. S. Radhakrishnan Memorial Lecture (11th), Indian Institute of Advanced Studies, Shimla, 2006.

'Creativity in Chemical Synthesis', Lecture Series and Prize, FUNDP, Namur, Belgium, 2007.

Oppolzer Lecture, University of Geneva, Switzerland, 2007.

Foundation Day Lectures and Convocation addresses at several CSIR laboratories, universities and national institutes, 1980-