Efficient synthesis of benzopyrano[2,3-b]pyridines by sequential reactions of 1,3-bis-silyl enol ethers with 3-cyanobenzopyrylium triflates
作者:Peter Langer、Bettina Appel
DOI:10.1016/s0040-4039(03)01030-x
日期:2003.6
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. (C) 2003 Elsevier Science Ltd. All rights reserved.