Ruthenium-catalyzed oxidative C–H alkenylation of aryl carbamates
作者:Jie Li、Christoph Kornhaaß、Lutz Ackermann
DOI:10.1039/c2cc36196e
日期:——
A cationic ruthenium(II) catalyst enabled highly efficient oxidative alkenylations of electron-rich arenes bearing removable, weakly coordinating carbamates, and allowed for cross-dehydrogenative CâH bond functionalization in an aerobic manner.
Rhodium-Catalyzed Selective C–H Activation/Olefination of Phenol Carbamates
作者:Tian-Jun Gong、Bin Xiao、Zhao-Jing Liu、Jian Wan、Jun Xu、Dong-Fen Luo、Yao Fu、Lei Liu
DOI:10.1021/ol201140q
日期:2011.6.17
Rh(III)-catalyzed ortho C-H activation/olefination of phenol carbamates has been developed. High regioselectivity is observed with a range of phenol carbamates enabling efficient coupling with acrylates and styrenes. This reaction exhibits different reactivity as compared to the Pd-catalyzed ortho-arylation reaction of phenol esters and provides a new approach for the synthesis of ortho-substituted phenols.
Palladium-Catalyzed <i>Ortho</i>-Arylation of <i>O</i>-Phenylcarbamates with Simple Arenes and Sodium Persulfate
作者:Xiaodan Zhao、Charles S. Yeung、Vy M. Dong
DOI:10.1021/ja100783c
日期:2010.4.28
reactive C-H bonds are present on the O-phenylcarbamate, selective diarylation can be achieved via quadruple C-Hbond functionalization. This work represents a rare example of using O-carbamates as directing groups for catalytic C-Hbondactivation. Additionally, a palladacycle obtained from an O-phenylcarbamate was prepared and fully characterized. This trifluoroacetate-bridged bimetallic Pd complex