Palladium-Catalyzed α-Arylation of Carboxylic Acids and Secondary Amides via a Traceless Protecting Strategy
作者:Zhi-Tao He、John F. Hartwig
DOI:10.1021/jacs.9b03291
日期:2019.7.31
for the long-standing challenge of conducting the palladium-catalyzed α-arylation of carboxylic aids and secondary amides with aryl halides. Both of the presented coupling processes occur with a variety of carboxylic acids and amides and with a variety of aryl bromides containing a broad range of functional groups, including base-sensitive functionality like acyl, alkoxycarbonyl, nitro, cyano, and even
针对钯催化羧酸助剂和仲酰胺与芳基卤化物的 α-芳基化这一长期存在的挑战,提出了一种新颖的无痕保护策略。所提出的两种偶联过程均与各种羧酸和酰胺以及各种含有多种官能团的芳基溴发生,包括碱敏感官能团,如酰基、烷氧基羰基、硝基、氰基,甚至羟基。通过该方法一步制备了5种商品化药物,收率81-96%。低钯负载量药物萘普生和氟比洛芬的克级合成进一步凸显了该方法的实用价值。