6-Trifluoromethyl-Phenanthridines through Radical Trifluoromethylation of Isonitriles
作者:Bo Zhang、Christian Mück-Lichtenfeld、Constantin Gabriel Daniliuc、Armido Studer
DOI:10.1002/anie.201306082
日期:2013.10.4
A radical approach toward 6‐perfluoroalkylphenanthridines employs the Togni reagent or derivatives thereof as radical precursors and occurs in the absence of a transition metal. Bu4NI is applied as radical initiator and phenanthridines are formed in good to excellent yields. In contrast to the currently intensively investigated trifluoromethylation of arenes, the arene core is formed during the trifluoromethylation
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.