Mild Synthesis of Chalcones via Rhodium(III)-Catalyzed C–C Coupling of Arenes and Cyclopropenones
摘要:
A Rh(III)-catalyzed aryl C-H bond insertion into cyclopropenones via a C-H activation pathway has been reported. A series of arenes bearing directing groups such as 2-pyridyl, 2-pyrimidyl, N-pyrazyl, and oxime can be applicable, providing chalcones in excellent yields under mild conditions. Several possible Rh(III) intermediates in this reaction were investigated.
Three-component couplings have been realized for efficiently constructing various nitrogen-containing skeletons via C–H activation, where difluorocyclopropenes have been first identified as coupling partners. Many substrates including sp2 and sp3 C–H substrates were well tolerated, furnishing the corresponding products in good yields. Furthermore, a catalyst-dependent reaction was also developed, enabling
Mild Synthesis of Chalcones via Rhodium(III)-Catalyzed C–C Coupling of Arenes and Cyclopropenones
作者:Songjie Yu、Xingwei Li
DOI:10.1021/ol500140e
日期:2014.2.21
A Rh(III)-catalyzed aryl C-H bond insertion into cyclopropenones via a C-H activation pathway has been reported. A series of arenes bearing directing groups such as 2-pyridyl, 2-pyrimidyl, N-pyrazyl, and oxime can be applicable, providing chalcones in excellent yields under mild conditions. Several possible Rh(III) intermediates in this reaction were investigated.