A general method has been developed for the asymmetric synthesis of 3-vinylidene tetrahydropyrans and 3-vinylidene oxepanes based on the Lewis acid-catalyzed intramolecular reactions of oxocarbenium ions with propargylsilanes. The observed excellent diastereoselectivity and a high asymmetric induction offer a new synthetic method with a wide scope and generality. (c) 2008 Elsevier Ltd. All rights reserved.
HIEMSTRA, H.;FORTGENS, H. P.;STEGENGA, S.;SPECKAMP, W. N., TETRAHEDRON LETT., 1985, 26, N 26, 3151-3154
作者:HIEMSTRA, H.、FORTGENS, H. P.、STEGENGA, S.、SPECKAMP, W. N.