Reaction of hexafluorothioacetone dimer with ketene dimethylacetal and dimethyl thioacetal
作者:Viacheslav A. Petrov、Will Marshall
DOI:10.1016/j.jfluchem.2012.06.031
日期:2012.11
It was demonstrated that the fluoride anion catalyzed reaction of 2,2,4,4-terakis(trifluoromethyl)dithienane-1,3 (1, cyclic dimer of hexafluorothioacetone) with ketene dimethylacetal (2, 1,1-dimethoxy ethylene) leads to the formation of 2,2-bis(trifluoromethyl)-3,3-bis(methoxy)thietane (3), rather than expected 2,2-bis(trifluoromethyl)-4,4-bis(methoxy)thietane isomer (4). Compound 3 is a kinetic product
已证实的2,2,4,4- terakis(三氟甲基)dithienane -1,3(氟化物阴离子催化反应1,hexafluorothioacetone的环状二聚物)与乙烯酮二甲基乙缩醛(2,1,1-二甲氧基乙烯)通向的2,2-双(三氟甲基)-3,3-双(甲氧基)硫杂环丁烷(形成3),而不是预期的2,2-双(三氟甲基)-4,4-双(甲氧基)硫杂环丁烷异构体(4) 。化合物3是动力学产物和一旦在环境温度下存储经历定量异构化为4。异构化通过形成游离的六氟硫丙酮进行,该六氟硫丙酮被四环烷作为环加合物捕获。还证明的是,乙烯2在不存在催化剂的情况下能够与二聚体1反应。该反应导致异常的开环过程,产生(2,2-二甲氧基乙烯基)(1,1,1,3,3,3-六氟-2-(1,1,1,3,3,3-六氟丙烷-2-乙)硫基)丙-2-基)硫烷(11)。