Palladium-Catalyzed Intermolecular Coupling of 2-Silylaryl Bromides with Alkynes: Synthesis of Benzosiloles and Heteroarene-Fused Siloles by Catalytic Cleavage of the C(sp3)Si Bond
作者:Yun Liang、Weizhi Geng、Junnian Wei、Zhenfeng Xi
DOI:10.1002/anie.201108154
日期:2012.2.20
Unusual split: A wide variety of benzosiloles and derivatives are obtained by the Pd‐catalyzed intermolecularcoupling of 2‐silylaryl bromides and alkynes and the accompanying selective cleavage of the C(sp3)Si bonds as a key step (see scheme). The product spectrum includes benzosiloles, benzothiophene‐fused siloles, ladder‐type π‐conjugated benzosiloles, and thiophene‐bridged 2,5‐bisbenzosiloles