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Synlett 2005(15): 2317-2320
DOI: 10.1055/s-2005-872656
DOI: 10.1055/s-2005-872656
LETTER
© Georg Thieme Verlag Stuttgart · New York
An Efficient and Improved Method for the Synthesis of Bis(arylmethylidene)thiopyranones
Further Information
Received
27 April 2005
Publication Date:
05 August 2005 (online)
Publication History
Publication Date:
05 August 2005 (online)
Abstract
Double crossed aldol condensation of a variety of aromatic aldehydes with tetrahydrothiopyran-4-one in the presence of N-(trimethylsilyl)diethylamine and 5 M lithium perchlorate in diethyl ether at room temperature is described. Excellent yields of 3,5-bis(arylmethylidene)thiopyranones are achieved in a facile one-pot general procedure.
Key words
3,5-bis(arylmethylidene)thiopyranones - thiopyrans - lithium perchlorate - crossed aldol condensation
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