Copper Catalyzed N-Arylation of Amidines with Aryl Boronic Acids and One-Pot Synthesis of Benzimidazoles by a Chan–Lam–Evans N-Arylation and C–H Activation/C–N Bond Forming Process
Mono-N-arylation of benzamidines 1 with aryl boronic acids 2 was effectively achieved in the presence of a catalytic amount of Cu(OAc)(2) and NaOPiv under mild aerobic conditions. Combining this step with an intramolecular direct C-H bond functionalization, catalyzed by the same catalytic system but under oxygen at 120 degrees C, afforded benzimidazoles 3 in good to excellent yields.
Rao; Ratnam, Proceedings - Indian Academy of Sciences, Section A, 1958, # 48, p. 256,258, 260
作者:Rao、Ratnam
DOI:——
日期:——
BENZIMIDAZOLES USEFUL AS MODULATORS OF ION CHANNELS
申请人:Wilson Dean M.
公开号:US20080306129A1
公开(公告)日:2008-12-11
The present invention relates to compounds of Formula I:
or a pharmaceutically acceptable salt thereof, wherein the R
1
, Z, Y, R
A
, and W groups of formula I are as defined herein. The invention also provides pharmaceutically acceptable compositions and methods of using the compositions in the treatment of various disorders.