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Efficient synthesis of benzopyrano[2,3-b]pyridines by sequential reactions of 1,3-bis-silyl enol ethers with 3-cyanobenzopyrylium triflates

✍ Scribed by Peter Langer; Bettina Appel

Publisher: Elsevier Science
Year: 2003
Tongue: French
Weight: 109 KB
Volume: 44
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(03)01030-x

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✦ Synopsis

Benzopyrano[2,3-b]pyridines were efficiently prepared by condensation of 1,3-bis-silyl enol ethers with 3-cyanobenzopyrylium triflates and subsequent domino 'retro-Michael-lactonization-aldol' reactions.

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