Palladium-Catalyzed C–H Functionalization Using Guanidine as a Directing Group: Ortho Arylation and Olefination of Arylguanidines
摘要:
Palladium-catalyzed C-H functionalization using guanidine as the directing group was achieved under mild reaction conditions. Various guanidine derivatives were produced in moderate to good yields by using simple unactivated arenes or ethyl acrylate as the source of arylation or olefination, respectively.
Cleavage of 2-(Arylamino)-4,6-dimethoxypyrimidines To Yield Arylguanidines
作者:Julian W. Shaw、David H. Grayson、Isabel Rozas
DOI:10.1002/ejoc.201402179
日期:2014.6
A novel method for the synthesis of aryl-substituted guanidines in good overall yields is presented; it consists of the acidic cleavage of 2-(arylamino)-4,6-dimethoxypyrimidines, which were prepared by coupling aryl bromides with 2-amino-4,6-dimethoxypyrimidine. This methodology introduces a new means of protection for the guanidine functionality.