Reactions of 1,2,4-triazines with nitromethide ion. A convenient method of preparation of 1,2,4-triazin-5-ylcarbaldehyde oximes and their synthetic applications
作者:Andrzej Rykowski、Danuta Branowska、Mieczyslaw Makosza、Phan Van Ly
DOI:10.1002/jhet.5570330603
日期:1996.11
An efficient procedure for the preparation of 1,2,4-triazin-5-ylcarbaldehyde oximes 2a-f from 1,2,4-triazines 1a-f and nitromethide ion is described. The oximes 2c-d were converted into corresponding 5-cyano-1,2,4-triazines 6c-d. The latter compounds react easily with various nucleophiles to afford 5-substituted 1,2,4-triazines 7a-i and with 1-pyrrolidino-1-cyclohexene to form cyano derivative of 5
描述了一种由1,2,4-三嗪1a-f和硝基甲烷离子制备1,2,4-三嗪-5-基甲醛甲醛肟2a-f的有效方法。肟2c-d被转化为相应的5-氰基-1,2,4-三嗪6c-d。后者化合物容易与各种亲核试剂反应,以提供5取代的1,2,4-三嗪7a-i和与1-吡咯烷-1-环己烯形成5,6,7,8-四氢异喹啉9的氰基衍生物。