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Synlett 2007(7): 1016-1025
DOI: 10.1055/s-2007-973894
DOI: 10.1055/s-2007-973894
ACCOUNT
© Georg Thieme Verlag Stuttgart · New York
Domino Reactions of 1,3-Bis(silyl enol ethers) with 4-(Trialkylsilyloxy)benzopyrylium Triflates
Weitere Informationen
Received
15 October 2006
Publikationsdatum:
13. April 2007 (online)
Publikationsverlauf
Publikationsdatum:
13. April 2007 (online)
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Abstract
4-(Silyloxy)benzopyrylium triflates can be readily generated in situ by reaction of chromones with trialkylsilyl-trifluoromethanesulfonate. Domino reactions of silyl enol ethers with benzopyrylium triflates - derived from chromones, 3-cyanochromones and 3-formylchromones - allow an efficient synthesis of a variety of carba- and heterocycles.
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1 Introduction
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2 Reaction of 1,3-Bis(silyl enol ethers) with Chromones
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3 Reaction of 1,3-Bis(silyl enol ethers) with 3-Cyanochromones
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4 Reaction of 1,3-Bis(silyl enol ethers) with 3-Formylchromones
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5 Conclusions
Keywords
cyclizations - domino reactions - heterocycles - pyrylium salts - silyl enol ethers
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