Electroreduction of 1-methyl 5-nitroindole, 5-nitrobenzofurane, and 5-nitrobenzothiophene in acidic and basic hydroorganic media: Generation and trapping of iminoquinone-type intermediates and electrosynthesis of ring-substituted amino derivatives
作者:Luc Bouchard、Ian Marcotte、Jean Marc Chapuzet、Jean Lessard
DOI:10.1139/v03-149
日期:2003.10.1
Preparative electrolysis of 1-methyl-5-nitroindole ( 1b ,X=N CH 3), 5-nitrobenzofurane (1c ,X=O ), and 5- nitrobenzothiophene (1d ,X=S ) at Hg, inacidic hydromethanolic media, leads to the formation of the corresponding 4-substituted amino derivatives 5, which result from the 100% regioselective addition to iminoquinone-type intermediate 4 of methanol or of any other good nucleophile present in the
1-甲基-5-硝基吲哚 (1b ,X=N CH 3)、5-硝基苯并呋喃 (1c ,X=O ) 和 5-硝基苯并噻吩 (1d ,X=S ) 在 Hg、无酸性氢甲醇介质、铅的制备电解形成相应的 4-取代氨基衍生物 5,这是由甲醇或电解溶液中存在的任何其他良好亲核试剂 100% 区域选择性加成到亚氨基醌型中间体 4 的结果。在酸性介质中,亚氨基喹啉中间体 4b 和 4c 被困在环加成反应中,环戊二烯被添加到电解介质中。根据 AM1 计算讨论了亲核加成的区域化学。