Three-Component Site-Selective Synthesis of Highly Substituted 5<i>H</i>-Chromeno-[4,3-<i>b</i>]pyridines
作者:Cong-Hai Zhang、Rong Huang、Xing-Mei Hu、Jun Lin、Sheng-Jiao Yan
DOI:10.1021/acs.joc.8b00099
日期:2018.5.4
3-formylchromones 1 and different types of 1,1-enediamines (EDAMs) 2 with different alcohols or amines 3 by a site-selective synthesis of 5H-chromeno[4,3-b]pyridines in an environmentally friendly solvent. This protocol is especially suitable for the efficient and rapid parallel synthesis of 5H-chromeno[4,3-b]pyridine compounds. It also has some advantages, such as convenience of operation, short reaction
一种有效的,简洁的单罐方法被开发基于3- formylchromones级联反应1 1,1- enediamines(艾迪)以及不同类型2用不同的醇或胺3通过5的位点选择性合成ħ -chromeno [4,3- b ]吡啶在环境友好的溶剂中。该方案特别适合于5 H -chromeno [4,3- b ]吡啶化合物的高效,快速平行合成。它还具有一些优点,例如操作方便,反应时间短,使用绿色溶剂以及易于通过用乙醇洗涤粗产物进行纯化。