Enantioselective Synthesis of Fluoro–Dihydroquinazolones and −Benzooxazinones by Fluorination-Initiated Asymmetric Cyclization Reactions
作者:Kenichi Hiramatsu、Takashi Honjo、Vivek Rauniyar、F. Dean Toste
DOI:10.1021/acscatal.5b02182
日期:2016.1.4
Stereoselective synthesis of two fluorine-bearing drug-like scaffolds, dihydroquinazolone and benzooxazinone, has been accomplished through asymmetric fluorocyclization reactions initiated by the fluorination process. The reaction employs double axially chiral anionic phase-transfer catalysts to achieve high diastereo- and enantioselectivities, and a wide range of fluorine-containing dihydroquinazolones were obtained (>20:1 dr, up to 98% ee).