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Letters in Organic Chemistry

Editor-in-Chief

ISSN (Print): 1570-1786
ISSN (Online): 1875-6255

Metal Free One Pot Approach Towards the Synthesis of Hantzsch Esters and their Application as the Hydrogen Source for the Reduction of Activated Olefins Catalysed by Bromo Dimethyl Sulfonium Bromide (BDMS)

Author(s): Papori Goswami, Shahzad Ali, Md. M. Khan and Babulal Das

Volume 5, Issue 8, 2008

Page: [659 - 664] Pages: 6

DOI: 10.2174/157017808786857507

Price: $65

Abstract

An environmentally benign one pot synthesis of dihydropyridines and its use as hydrogen source in the reduction of α,β-unsaturated aldehydes and ketones using catalytic amount of BDMS at room temperature is described. An extensive study on the role of substituents on aldehyde for the formation of Hantzsch esters, reveals that presence of more than one electron donating substituents, hinders the formation of dihydropyridine derivative.

Keywords: Hantzsch esters, metal free catalyst, β-ketoester, reducing agents, dihydropyridines, substituent effects


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