Phosphine-Mediated Olefination between Aldehydes and Allenes: An Efficient Synthesis of Trisubstituted 1,3-Dienes with High <i>E</i>-Selectivity
作者:Silong Xu、Lili Zhou、San Zeng、Renqin Ma、Zhihong Wang、Zhengjie He
DOI:10.1021/ol901334c
日期:2009.8.6
The phosphine-mediated olefination of aldehydes with electron-deficient allenes to afford trisubstituted conjugated dienes in fair to excellent yields with high E-selectivity is described. The reaction represents a newreactivity pattern of allenes with aldehydes and also provides a highly stereoselective synthetic method for preparing conjugated dienes. In the reaction, the phosphine acts as a nucleophilic