Synthesis of Chloro(phenyl)trifluoromethyliodane and Catalyst-Free Electrophilic Trifluoromethylations
作者:Cong Xu、Xiaoning Song、Jia Guo、Sibao Chen、Jie Gao、Jing Jiang、Fengyun Gao、Yuxin Li、Mang Wang
DOI:10.1021/acs.orglett.8b01510
日期:2018.7.6
present work deals with a challenge in the synthesis of aryltrifluoromethyliodanes (ArICF3X) and develops a direct route to PhICF3Cl via a simple ligand-exchange reaction of PhI(OCOCF3)2, Me3SiCF3, and NaCl for the first time. The I–Cl bond length in PhICF3Cl supports its iodonium character, which enables an enhanced CF3-transfer capability in electrophilic S-, O-, N-, and C-trifluoromethylations as
A mechanistically new strategy has been described for the simple, practical, and environmentally friendly preparation of 6-(trifluoromethyl)phenanthridine derivatives using ionic isocyanide insertion from biphenyl isocyanide derivatives and Umemoto’s reagent. These reactions were promoted only by inorganic base in good-to-excellent chemical yields without any external stoichiometric oxidants and radical
A palladium-catalyzed tandem Suzuki/C–H arylation reaction of N-aryltrifluoroacetimidoyl chlorides with arylboronic acids has been developed. A variety of 6-(trifluoromethyl)phenanthridines were prepared in moderate to excellent yields from N-(2-bromophenyl)trifluoroacetimidoyl chlorides which can be conveniently prepared from 2-bromoaniline derivatives.