A simple base-mediated tandem SN2'/SNV reaction of readily available -trifluoromethyl-, -unsaturated carbonylcompounds with N-tosylated 2-aminomalonates was developed, which provide an efficient access to functionalized tetrasubstituted 2-fluoro-2-pyrrolines in good to...
A new route to α-trifluoromethyl-α,β-unsaturated esters
作者:Xingang Zhang、Feng-Ling Qing、Yonggang Yang、Jiang Yu、Xiang-Kai Fu
DOI:10.1016/s0040-4039(00)00279-3
日期:2000.4
The treatment of α-bromo-α,β-unsaturated esters with FSO2CF2CO2Me and CuI in DMF/HMPA constitutes a new synthetic scheme for the preparation of α-trifluoromethyl-α,β-unsaturated esters.
在DMF / HMPA中用FSO 2 CF 2 CO 2 Me和CuI处理α-溴-α,β-不饱和酯构成了制备α-三氟甲基-α,β-不饱和酯的新合成方案。
Copper(I)/Ming-Phos-Catalyzed Asymmetric Intermolecular [3 + 2] Cycloaddition of Azomethine Ylides with α-Trifluoromethyl α, β-Unsaturated Esters
α-trifluoromethyl α,β-unsaturated esters as dipolarophiles pose considerable challenge due to expeditious defluorination and intrinsic steric hindrance. The present work provides an efficient access to valuable pyrrolidines bearing a trifluoromethylated all-carbon quaternary stereocenter through copper/M7-catalyzed asymmetric dipolar cycloaddition of α-trifluoromethyl α,β-unsaturated esters with azomethine