Organocatalytic enantioselective conjugate addition of nitroalkanes to trifluoromethylated 3-methyleneoxindoles
作者:Wen-Bing Qin、Qinxin Lou、Wei Xiong、Guo-Kai Liu
DOI:10.1016/j.tetlet.2020.152443
日期:2020.10
A bifunctional squaramide catalyzed asymmetric conjugate addition of nitroalkanes to trifluoromethylated 3-methyleneoxindoles was developed, and a range of trifluoromethyl containing oxindole derivatives were obtained with generally high yields and enantioselectivities. The nitro functionality and oxindole scaffold in the corresponding products are versatile buildingblocks that readily enable many
A new synthetic approach to oxindoles (1,3-dihydro-2H-indol-2-ones) by reductive dephosphorylation with hydroiodic acid of 3-(diethylphosphoryloxy)- oxindoles, derived from isatins (1H-Indole-2,3-diones)