Partially fluorinated heterocyclic compounds. Part IV. The preparation of 4,5,6,7-tetrafluoroindole by a new cyclisation reaction
作者:G. M. Brooke、R. J. D. Rutherford
DOI:10.1039/j39670001189
日期:——
Treatment of the sodium salt of pentafluoroaniline with diethyl acetylenedicarboxylate in tetrahydrofuran gave a stable secondary vinylamine, diethyl N-(2,3,4,5,6-pentafluorophenyl)aminofumarate which with sodium hydride in NN-dimethylformamide gave 2,3-diethoxycarbonyl-4,5,6,7-tetrafluoroindole. Hydrolysis of this indole and decarboxylation of the 2-carboxylic acid gave 4,5,6,7-tetrafluoroindole which
的
五氟苯胺与
丁炔二酸二甲酯在
四氢呋喃中的钠盐的处理,得到一个稳定的二级
乙烯胺,
二乙基ñ - (2,3,4,5,6-
五氟苯基)aminofumarate,其与在氢化
钠NN二甲基甲酰胺,得到2,3-diethoxycarbonyl-
4,5,6,7-四氟吲哚。该
吲哚的
水解和2-
羧酸的脱羧得到
4,5,6,7-四氟吲哚,其与
喹啉形成1:1的分子加成络合物。