Heteroannulated Coumarins and Chromones from Chemical Transformations of 6,8‐Dimethylchromone‐3‐carbonitrile
作者:Magdy A. Ibrahim、Al‐Shimaa Badran、Salsabeel H. Hashiem
DOI:10.1002/jhet.3354
日期:2018.12
fused coumarins and chromones were efficiently synthesized from chemical transformations of 6,8‐dimethylchromone‐3‐carbonitrile (1) with a variety of carbon nucleophilic reagents. Ring opening ring closure reactions of carbonitrile 1 with cyanoacetohydrazide, malononitrile dimer (2‐aminoprop‐1‐ene‐1,1,3‐tricarbonitrile), and isomeric cyclohexanediones led to a diversity of coumarins and chromones fused
通过将6,8-二甲基色酮-3-腈(1)与多种碳亲核试剂进行化学转化,可以有效地合成一系列融合了香豆素和色酮的杂环系统。腈1与氰基乙酰肼,丙二腈(2-氨基丙-1-烯-1,1,3-三腈)和异构体环己二酮的开环闭环反应导致了多种香豆素和色酮稠合的氮杂环系统。另外,1-乙基-4-羟基喹啉-2(1 H)-one(13)和6-乙基-4-羟基吡喃[3,2 - c ]喹啉-2,5(6 H)-二酮(14)是相当于腈1的化学当量生成苯并[ h ] chromeno [2,3- b ] [1,6]萘啶衍生物15。根据新合成产物的分析和光谱数据推导其结构。