Rhodium(III)-Catalyzed Oxidative <i>ortho</i>-Olefination of Phenyl Carbamates with Alkenes: Elucidation of Acceleration Mechanisms by Using an Unsubstituted Cyclopentadienyl Ligand
作者:Jin Tanaka、Yuki Nagashima、Ken Tanaka
DOI:10.1021/acs.orglett.0c02499
日期:2020.9.18
It has been established that an unsubstituted cyclopentadienyl (Cp) Rh(III) complex is an effective catalyst for the oxidative ortho-olefination of phenyl carbamates with both acrylates and styrenes under mild conditions. In addition, diolefination of a protected BINOL (1,1′-binaphthalene-2,2′-diol) proceeded in high yields and disubstituted acrylates could participate in this catalysis. Experimental
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.
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.