A facile synthetic method of α-quaternary-β,γ-unsaturated aldehydes via the stereoselective 1,4-elimination and α-regioselective Ferrier reaction
作者:Eiji Tayama、Ryo Hashimoto
DOI:10.1016/j.tetlet.2007.09.049
日期:2007.11
The 1,4-elimination reaction of 2-substituted-(2Z)-4-methoxy-O-alkenyl acetals with n-butyllithium is shown to afford the 2-substituted-(1Z,3E)-O-1,3-dienyl acetals in high stereoselectivities. The Ferrier reaction of the O-1,3-dienyl acetals thus obtained provides the corresponding alpha-quaternary-beta,gamma-unsaturated aldehydes in excellent yields with high alpha-regioselectivities. (c) 2007 Elsevier Ltd. All rights reserved.