Ortho- and Para-Selective Ruthenium-Catalyzed C(sp2)–H Oxygenations of Phenol Derivatives
摘要:
Versatile ruthenium catalysts allowed for efficient direct oxygenations of aryl carbamates under remarkably mild reaction conditions. In addition to chelation-assisted C-H activation, the optimized ruthenium catalyst proved amenable to para-selective hydroxylations of anisoles without Lewis basic directing groups.
Ruthenium-catalyzed highly regio- and stereoselective hydroarylation of aryl carbamates with alkynesvia C–H bond activation
作者:Mallu Chenna Reddy、Masilamani Jeganmohan
DOI:10.1039/c2cc37758f
日期:——
Chelation-assisted alkenylation of ortho CâH bond of aryl carbamates with alkynes in the presence of a ruthenium catalyst, AgSbF6 and pivalic acid gives highly substituted alkene derivatives in good to excellent yields in a highly regio- and stereoselective manner.
Ruthenium-Catalyzed Selective Aerobic Oxidative<i>ortho</i>-Alkenylation of Substituted Phenols with Alkenes through C-H Bond Activation
作者:Mallu Chenna Reddy、Masilamani Jeganmohan
DOI:10.1002/ejoc.201201463
日期:2013.2
The oxidative coupling of phenyl carbamates and acetates with alkenes in the presence of a catalytic amount of [RuCl2(p-cymene)]2, AgSbF6, and Cu(OAc)2·H2O under air provided substituted alkene derivatives in a highly regio- and stereoselective manner. The catalytic reaction was compatible with various alkenes such as acrylates, vinyl sulfones, acrylonitrile, and substituted styrenes. The present catalytic