Fluorine Effects on Group Migration via a Rhodium(V) Nitrenoid Intermediate
作者:Cheng-Qiang Wang、Yu Zhang、Chao Feng
DOI:10.1002/anie.201708505
日期:2017.11.20
alkynes with N-pivaloyloxy aryl amides enabled the efficient regiospecificsynthesis of difluorinated 2-alkenyl aniline derivatives (see scheme). The fluorine substituents in the alkyne substrates diverted the course of the reaction from the conventional annulation pathway to promote the hydroarylation process involving Lossen rearrangement.