Preparation of Phenanthridines from <i>o</i>-Cyanobiaryls via Addition of Organic Lithiums to Nitriles and Imino Radical Cyclization with Iodine
作者:Atsushi Kishi、Katsuhiko Moriyama、Hideo Togo
DOI:10.1021/acs.joc.8b01688
日期:2018.9.21
methyllithium, ethylmagnesium bromide, butyllithium, phenyllithium, p-methylphenyllithium, etc., followed by the reaction with water and then with molecular iodine at 60 °C provided efficiently 6-methyl-, 6-ethyl-, 6-butyl-, 6-phenyl, 6-(p-methylphenyl)phenanthridines, etc., in good yields, respectively. Here, imines formed through the addition of carbanion onto the nitriles reacted with molecular iodine
用甲基锂,乙基溴化镁,丁基锂,苯基锂,对甲基苯基锂等对2-氰基联芳基进行简单处理,然后与水反应,然后在60°C下与分子碘反应,可有效提供6-甲基-,6-乙基-,分别以良好的收率得到6-丁基-,6-苯基,6-(对甲基苯基)菲啶等。在这里,通过在腈上加碳负离子而形成的亚胺与分子碘反应,平稳地形成N-碘亚胺,并且它们的加温处理诱导了亚胺基的形成,该亚胺基顺利地环化到芳基上,得到6烷基和6芳基菲啶。