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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 41, 2011 - Issue 18
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Original Articles

Simple Strategy for Sulfonyl Ethynylogs of Coumarins

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Pages 2693-2700 | Received 01 Apr 2010, Published online: 29 Jun 2011
 

Abstract

Synthesis of 3-(2-(phenylsulfonyl) ethynyl)-2H-chromen-2-one is described. Reaction of β-ketosulfones with semicarbazide hydrochloride in ethanol at reflux temperature gave the corresponding semicarbazones, which on oxidative cyclization with selenium dioxide resulted in the formation of the corresponding 1,2,3-selenodiazole derivatives. These on pyrolysis gave the titled compounds.

Graphical Abstract

ACKNOWLEDGMENT

Financial support from the Council of Scientific and Industrial Research, New Delhi, for the project (No. 01 (2062) 06/EMR-II) is gratefully acknowledged.

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