Catalyst-dependent chemoselective insertion of diazoalkanes into the N–H/C–H/O–H/C–O bonds of 2-hydroxybenzothiazoles
作者:Lvnan Jin、Xuan Zhou、Yunbo Zhao、Jing Guo、Douglas W. Stephan
DOI:10.1039/d2ob01048h
日期:——
The control of chemoselective insertions of diazoalkanes into 2-hydroxybenzothiazoles is challenging. Herein, the chemoselective N–H, O–H, C–O or C–H bond insertions of diazoalkanes into 2-hydroxybenzothiazoles are achieved using B(C6F5)3, Rh2(OAc)4 or TfOH as the catalyst. This affords routes to 54 benzothiazole derivatives. These protocols are scalable and demonstrate the complementary nature of
重氮烷烃化学选择性插入 2-羟基苯并噻唑的控制具有挑战性。在此,使用 B(C 6 F 5 ) 3、Rh 2 (OAc) 4或 TfOH 作为催化剂,实现了重氮烷烃向 2-羟基苯并噻唑的化学选择性 N-H、O-H、C-O 或 C-H 键插入. 这提供了生成 54 种苯并噻唑衍生物的途径。这些协议是可扩展的,并展示了路易斯酸、过渡金属和布朗斯台德酸催化剂的互补性。