Biocatalytic one-pot three-component synthesis of 4H-chromene derivatives in non-aqueous medium
作者:Prabhakar Shrivas、Umesh Pratap
DOI:10.1007/s11696-018-00679-5
日期:2019.5
The baker’s yeast catalyzed one-pot three-component cyclocondensation of salicylaldehyde, malononitrile or ethyl cyanoacetate, and nitroalkanes for the synthesis of substituted 2-amino-4H-chromene derivatives is presented. The highlights of the protocol is a use of a biodegradable catalyst which is inexpensive, having simple reaction conditions, in other words, at room temperature and neutral pH, good-to-excellent
提出了面包酵母催化水杨醛,丙二腈或氰基乙酸乙酯与硝基烷烃的一锅三组分环缩合反应,以合成取代的2-氨基-4 H-亚甲基苯衍生物。该方案的重点是使用廉价的生物可降解催化剂,其具有简单的反应条件,换言之,在室温和中性pH下,良好至优异的产率,以及简单的后处理程序。 图形概要