Preparation and Properties of Trifluoromethylated Aryl Derivatives of Germanium, Tin, and Lead. High-Yield Syntheses of Trifluoromethylbenzene
作者:John K. Galiotos、John A. Morrison
DOI:10.1021/om000023m
日期:2000.6.1
With an excess of trifluoromethylating agent and relatively lengthy reaction times, complete displacement of the halides or halide equivalents from the group 14 centers was observed, and the new compounds PbPh(CF3)3, 51%, PbPh2(CF3)2, 61%, PbPh3CF3, 81%, SnPh2(CF3)2, 55%, SnPh3CF3, 80%, and GePh3CF3, 72%, were isolated and characterized. With shorter reaction times and/or with the trifluoromethylating
在THF或CHCl 3中研究了Cd(CF 3)2甘醇二甲醚与许多含芳基的Pb,Sn和Ge卤化物,乙酸盐和硫醚的配体交换反应。与过量的三氟甲基化试剂和相对较长的反应时间,从该组的卤化物或卤化物当量的完整位移观察到14个中心,而新的化合物PbPh(CF 3)3,51%,PbPh 2(CF 3)2, 61%,PbPh 3 CF 3,81%,SnPh 2(CF 3)2,55%,SnPh 3 CF 3,80%,和GePh分离并表征了3 CF 3(72%)。在较短的反应时间和/或以三氟甲基化试剂作为限制反应剂的情况下,部分取代占主导地位,新物种PbPh 2(Cl)CF 3占78%,PbPh 2(O 2 CCH 3)CF 3占89%,PbPh (O 2 CCH 3)2 CF 3,63%,和PbPh(O 2 CCH 3)(CF 3)2,64%被分开了。此外,对芳基-IVA化合物的反应性进行了两项初步研究。首先,研究了PbPh