An efficient four-component domino protocol for the rapid and green synthesis of functionalized benzo[a]pyrano[2,3-c]phenazine derivatives using caffeine as a homogeneous catalyst
作者:Afshin Yazdani Elah Abadi、Malek-Taher Maghsoodlou、Reza Heydari、Razieh Mohebat
DOI:10.1007/s11164-015-2083-5
日期:2016.2
A one-pot, two-step procedure has been used to synthesize functionalized benzo[a]pyrano[2,3-c]phenazine derivatives from a four-component condensation reaction of 2-hydroxynaphthalene-1,4-dione, o-phenylenediamine, aldehydes, and malononitrile in the presence of 1,3,7-trimethylpurine-2,6-dione (caffeine) as an expedient and reusable solid base catalyst. This new procedure has the following advantages: operational simplicity, short reaction times, environmentally friendly, easy work-up, and all the products were obtained in excellent yields.
一种一步锅、两步法已被用于合成功能化的苯并[a]吡喃[2,3-c]菲啶衍生物,其方法为:在1,3,7-三甲基嘌呤-2,6-二酮(咖啡因)作为方便易回收的固体碱催化剂存在下,通过2-羟基萘-1,4-二酮、邻苯二胺、醛和丙二腈的四组分缩合反应。该新方法具有以下优点:操作简便、反应时间短、环境友好、易于处理,且所得产物均以优异的产率获得。