Highly Diastereo- and Enantioselective Organocatalytic One-Pot Sequential 1,4-Addition/Dearomative-Fluorination Transformation
作者:Feng Li、Long Sun、Yuou Teng、Peng Yu、John Cong-Gui Zhao、Jun-An Ma
DOI:10.1002/chem.201202636
日期:2012.11.5
Fluorination: A wide range of nitroolefins and pyrazol‐5‐ones undergo a sequential 1,4‐addition/dearomative‐fluorination transformation when treated with a catalytic amount of a tertiary‐amine—thiourea compound and the terminal electrophile, N‐fluorobenzenesulfonimide, to give fluorinated products in 72–95 % yield with up to 99:1 d.r. and 98 % ee. Notably, these products contain adjacent tertiary and