Synthesis of 3-Alkoxymethylcoumarin from 3-Cyanochromene via a Novel Intermediate 2-Phenylimino-3-alkoxymethylchromene
作者:Jui-Chi Tsai、Sie-Rong Li、Michael Y. Chiang、Lian-Yeu Chen、Po-Yuan Chen、Yi-Fang Lo、Chen-Hao Wang、Chun-Nan Lin、Eng-Chi Wang
DOI:10.1021/jo9015634
日期:2009.11.20
method for the synthesis of 3-alkoxymethylcoumarin is described. From the reaction of 3-cyanochromene with an alkoxide and arylamine in THF, (Z)-2-phenylimino-3-alkoxymethylchromene was obtained as a novel intermediate via an isomerization of the double bond, a 1,2-addition of alkoxide, a Michael-type addition of aniline, an another isomerization of double bond and an elimination of ammonia. Subsequently
在本文中,描述了一种简明,有效且环境友好的合成3-烷氧基甲基香豆素的方法。由3- cyanochromene与在THF中的醇盐和芳基胺,(反应Ž)-2-苯基亚氨基-3- alkoxymethylchromene经由双键的异构化,1,2-加成醇盐中,获得作为新的中间体苯胺的迈克尔型加成,双键的另一种异构化和氨的消除。随后,通过用THF中的15%HCl处理,将中间体转化为所需的香豆素。