Balance between Allylic C−H Activation and Cyclopropanation in the Reactions of Donor/Acceptor-Substituted Rhodium Carbenoids with <i>trans</i>-Alkenes
作者:Huw M. L. Davies、Michael G. Coleman、Dominic L. Ventura
DOI:10.1021/ol702218w
日期:2007.11.1
Rhodium(II)-catalyzed reactions of aryldiazoacetates with (E)-aryl-substituted alkenes generate C-H insertion products and/or cyclopropanes. The product distribution is influenced by the nature of the donor group on the carbenold, the structure of the (E)-aryl-substituted alkenes, and the rhodium catalyst.
Role of Sterically Demanding Chiral Dirhodium Catalysts in Site-Selective C–H Functionalization of Activated Primary C–H Bonds
作者:Changming Qin、Huw M. L. Davies
DOI:10.1021/ja504797x
日期:2014.7.9
sterically demanding dirhodium tetracarboxylate catalysts on the site selectivity of C-H functionalization by means of rhodium carbene-induced C-Hinsertion is described. The established dirhodium tetraprolinate-catalyzed reactions of aryldiazoacetates cause preferential C-H functionalization of secondary C-H bonds as a result of competing steric and electronic effects. The sterically more demanding dirhodium