Oxidative Addition of Aryl and Benzyl Trifluoroacetates to Zerovalent Palladium Complexes with Two Modes of C–O Bond Cleavage Processes
作者:Kazuhiro Nagayama、Isao Shimizu、Akio Yamamoto
DOI:10.1246/bcsj.72.799
日期:1999.4
The aryl trifluoroacetates oxidatively added to a zerovalent palladium complex 2a with acyl-O bondcleavage under mild conditions to give the corresponding trans-(aryloxo)(trifluoroacetyl)palladium complexes 3a—3c. But 4-nitrophenyl trifluoroacetate reacted with 2a to yield cis-[Pd(OC6H4-4-NO2)2(PMe3)2] 3d, which was produced with C–O bond activation followed by disproportionation reaction. In contrast
O‐Trifluoromethylation of Carboxylic Acids via the Formation and Activation of Acyloxy(phenyl)trifluoromethyl‐λ<sup>3</sup>‐Iodanes
作者:Hongye Zhu、Chi Gao、Ting Yu、Cong Xu、Mang Wang
DOI:10.1002/anie.202400449
日期:2024.4.15
various potentially valuable and hitherto elusive trifluoromethyl carboxylic esters through the challenging O-trifluoromethylation of carboxylic acids is reported. The activation effect of ZnCl2 on acyloxy(phenyltrifluoromethyl-λ3-iodanes has been studied by DFT calculations and control experiments. The reaction can be used for late-stage modification of drugs and bioactive carboxylic acids as well.
Trifluoromethylhypofluorite reacts with N-substituted aziridines with ring opening and 1, 3-addition of F on nitrogen and OCF3 on carbon. Three R substituents are discussed. With R benzenesulfonyl or chlorine one mole of CF3OF is added and N-fluorobenzenesulfonamides and N-chloro, N-fluoroamine are obtained. With R 4-nitrobenzoyl two moles of CF3OF are added and a N, N-difluoroamine is isolated.