Regioselective Amine–Borane Cyclization: Towards the Synthesis of 1,2‐BN‐3‐Cyclohexene by Copper‐Assisted Triazole/Gold Catalysis
作者:Stephen E. Motika、Qiaoyi Wang、Novruz G. Akhmedov、Lukasz Wojtas、Xiaodong Shi
DOI:10.1002/anie.201604986
日期:2016.9.12
as the optimal catalytic system for promoting intramolecular hydroboration for the synthesis of a six‐membered cyclic amine–borane. Excellent yields (up to 95 %) and regioselectivities (5‐exo vs. 6‐endo) were achieved through catalyst control and sequential dilution. Good functional‐group tolerance was attained, thus allowing the preparation of highly functionalized cyclic amine–borane substrates,
三唑/金(TA-Au)和Cu(OTf)2的组合被认为是促进分子内氢硼化合成六元环胺-硼烷的最佳催化体系。通过催化剂控制和顺序稀释,获得了极高的收率(高达95%)和区域选择性(5-exo vs. 6-endo)。获得了良好的官能团耐受性,因此可以制备高度官能化的环胺-硼烷底物,而这是其他方法无法实现的。氘标记研究支持在金活化炔烃中加入氢化物并随后形成C-B键。