Experimental and Computational Studies on the Directing Ability of Chalcogenoethers in Palladium‐Catalyzed Atroposelective C−H Olefination and Allylation
作者:Gang Liao、Tao Zhang、Liang Jin、Bing‐Jie Wang、Cheng‐Kai Xu、Yu Lan、Yu Zhao、Bing‐Feng Shi
DOI:10.1002/anie.202115221
日期:2022.3
of chalcogenoether motifs in Pd-catalyzed atroposelective C−Holefination and allylation are presented. The thioether motif was found to be a superior directing group compared to the corresponding ether (−OR) and selenoether in terms of reactivity and enantiocontrol. The selenoether unit (−SeMe) was used for the first time as a suitable directing group in asymmetric C−H activation.
Copper-Mediated Radical Cross-Coupling Reaction of 2,2-Dichloro-1,1,1-trifluoroethane (HCFC-123) with Phenols or Thiophenols
作者:Xiao-Jun Tang、Qing-Yun Chen
DOI:10.1021/ol302962p
日期:2012.12.21
A copper-mediated cross-coupling reaction between HCFC-123 and phenols or thiophenols has been achieved. It is found that diethyl amine, which serves as both the activator and ligand of copper, plays a key role in this reaction. Two possible radical involved processes are proposed for the reaction mechanism.