Reactions of N-polyfluorophenylcarbonimidoyl dichlorides with primary and secondary amines. Kinetics and mechanism. Synthesis of polyfluorinated carbodiimides, chloroformamidines, guamidines and benzimidazoles.
作者:I.V. Kolesnikova、T.D. Petrova、V.E. Platonov、V.A. Mikhailow、A.A. Popov、V.A. Savelova
DOI:10.1016/s0022-1139(00)83067-5
日期:1988.8
N-polyfluorophenylcarbonimidoyl dichlorides with primary and secondary aliphatic and aromatic amines have been studied. With primary aliphatic amines, the reactions led to carbodiimides or guanidines, depending on the amount of amine. The carbodiimides obtained reacted with amines to form guanidines. The reactions with primary aromatic amines produced only triarylguanidines. N-Pentafluorophenyllcarbonimidoyl
已经研究了N-多氟苯基碳亚氨基二氯化物与伯和仲脂族和芳族胺的反应。对于伯脂族胺,取决于胺的量,反应导致碳二亚胺或胍。所获得的碳二亚胺与胺反应形成胍。与伯芳族胺的反应仅产生三芳基胍。N-五氟苯基碳亚氨基二氯(I)与四氟邻苯二胺反应,得到2-五氟苯胺基-4,5,6,7-四氟苯并咪唑。多氟苯并咪唑衍生物也通过多氟三芳基胍的热解而制得。N 1,N 2,N 3-三(五氟苯基)胍与K 2 CO的加热3在二甲基甲酰胺中生成1,2,3,4,7,8,9,10-八氟-5-五氟苯基-5H-苯并咪唑[1,2-a]苯并咪唑。N-多氟苯基碳亚氨基二氯化物已经在室温下与各种仲胺反应,以高收率得到N-多氟苯基氯甲form。升高的温度和延长的反应时间导致形成N-多氟苯基胍。研究了N-多氟苯基碳亚氨基二氯化物与伯胺和仲胺在25°C乙腈中反应的动力学和机理。已经发现反应是通过四面体中间体通过双分子亲核加成-消除机理进行的。根据