Synthesis of β,β-disubstituted-α-methylene-γ-butyrolactones via the regioselective oxidation of exo-methylenetetrahydrofurans
摘要:
The synthesis of various beta,beta-disubstituted-alpha-methylene-gamma-butyrolactones was carried out from the corresponding methylenetetrahydrofuran derivatives by using PCC/Ac2O or Jones oxidation conditions. (c) 2006 Elsevier Ltd. All rights reserved.
Sequential Michael Addition-Carbocyclization Reactions: A Palladium-Mediated Approach to Highly Functionalized 3-Methylenetetrahydrofurans
作者:Xavier Marat、Nuno Monteiro、Geneviève Balme
DOI:10.1055/s-1997-5755
日期:1997.7
A one-pot procedure for the preparation of highly functionalized 3-methylenetetrahydrofurans is described. The methodology is based on an oxygen nucleophile initiated Michael addition of propargyl alcohols to alkylidene or arylidenemalonates followed in situ by a palladium-mediated exo-dig cyclization.