Vicarious Nucleophilic Substitutions of Hydrogen in 1,1,1-Trifluoro-<i>N</i>-[oxido(phenyl)(trifluoromethyl)-λ<sup>4</sup>-sulfanylidene]methanesulfonamide
作者:Tadeusz Lemek、Grażyna Groszek、Piotr Cmoch
DOI:10.1002/ejoc.200800390
日期:2008.8
1,1,1-Trifluoro-N-[oxido(phenyl)(trifluoromethyl)-λ4-sulfanylidene]methanesulfonamide reacts with carbanions bearing a leaving group to give vicarious nucleophilic substitution (VNS) of hydrogen products with moderate yields. This is the first example of the VNS process at a benzene ring activated by an electron-withdrawing group other than a nitro group. The orientation of the substitution is exclusively
1,1,1-三氟-N-[氧化(苯基)(三氟甲基)-λ4-亚硫基]甲磺酰胺与带有离去基团的碳负离子反应,以中等产率产生氢产物的替代亲核取代(VNS)。这是 VNS 过程的第一个例子,苯环被除硝基以外的吸电子基团激活。替换的方向完全是对的。这些发现为探索 VNS 反应范围对硫基吸电子基团活化的化合物提供了很大的可能性。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)