In this report, a generalmethod for the preparation of 1,5-dicarbonyl compounds and six membered ring annelation is described. This method involves the reaction of hemiacetal vinylogs 1 with enol ethers 2 or 3 in the presence of a Lewis acid. This reaction was successfully applied to the enol ethers of α and α,α'-hindered ketones such as 2,2,6-trimethyl cyclohexanone. α-Cyperone and 6-epi-α-cyperone
An efficient asymmetric route to eudesmane acids. Total synthesis of (+)-12-hydroxy-α-cyperone, (+)-12-oxo-α-cyperone and (+)-3-oxoeudesma-4,11(13)-dien-12-oic acid
作者:Zhaoming Xiong、Jiong Yang、Yulin Li
DOI:10.1016/0957-4166(96)00335-7
日期:1996.9
DUHAMEL P.; HENNEQUIN L.; POIRIER J. M.; TAVEL G.; VOTTERO C., TETRAHEDRON, 42,(1986) N 17, 4777-4786
作者:DUHAMEL P.、 HENNEQUIN L.、 POIRIER J. M.、 TAVEL G.、 VOTTERO C.