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 intermolecular coupling 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
不寻常的分裂:通过Pd催化2-甲硅烷基芳基溴化物和炔烃的分子间偶联以及伴随的C(sp 3)Si键的选择性裂解作为关键步骤(参见方案),可以得到各种各样的苯并甲硅烷基及其衍生物。产品范围包括苯并甲硅烷,苯并噻吩稠合的甲硅烷,梯型π共轭苯并甲硅烷和噻吩桥联的2,5-双苯并甲硅烷。