Regioselective Synthesis of Functionalized Furans by Cyclization of 1,3-Bis-Silyl Enol Ethers with 1-Chloro-2,2-dimethoxyethane
作者:Esen Bellur、Helmar Görls、Peter Langer
DOI:10.1002/ejoc.200400805
日期:2005.5
Cyclization of 1,3-bis-silylenolethers with 1-chloro-2,2-dimethoxyethane allowed an efficient, regio- and diastereoselective synthesis of a variety of 2-alkylidene-4-methoxytetrahydrofurans. The TFA-mediated elimination of methanol resulted in the formation of functionalizedfurans. Similarly, 2,3,3a,4,5,6-hexahydro-2,3-benzofurans were prepared and transformed into 4,5,6,7-tetrahydro-2,3-benzofurans