Phosphane-Catalyzed [3+2] Annulation of Allenoates with Aldehydes: A Simple and Efficient Synthesis of 2-Alkylidenetetrahydrofurans
作者:Silong Xu、Lili Zhou、Renqin Ma、Haibin Song、Zhengjie He
DOI:10.1002/chem.200901276
日期:2009.9.7
Ylide is the key: The phosphane‐catalyzed [3+2] annulation of 2 a with aromatic aldehydes 1 to form tetrahydrofurans 3 in moderate to excellent yields is described (see scheme). This reaction represents an efficient and convergent one‐step route toward the construction of tetrahydrofurans and demonstrates a distinctive reactivity pattern of γ‐substituted allenoates with aldehydes.