Selective Amination of Polyhalopyridines Catalyzed by a Palladium−Xantphos Complex
摘要:
Amination of 5-bromo-2-chloropyridine (1a) catalyzed by a palladium-Xantphos complex predominately gives 5-amino-2-chloropyridine product 3a in 96% isolated yield and excellent chemoselectivity (3a/4a = 97:3). Amination of 2,5-dibromopyridine (11) under the same conditions exclusively affords 2-amino-5-bromopyridine 4a.
Selective Amination of Polyhalopyridines Catalyzed by a Palladium−Xantphos Complex
作者:Jianguo Ji、Tao Li、William H. Bunnelle
DOI:10.1021/ol0357696
日期:2003.11.1
Amination of 5-bromo-2-chloropyridine (1a) catalyzed by a palladium-Xantphos complex predominately gives 5-amino-2-chloropyridine product 3a in 96% isolated yield and excellent chemoselectivity (3a/4a = 97:3). Amination of 2,5-dibromopyridine (11) under the same conditions exclusively affords 2-amino-5-bromopyridine 4a.