Multicomponent Synthesis of Novel Penta-Heterocyclic Ring Systems Incorporating a Benzopyranopyridine Scaffold
作者:Sayed Riyadh、Sobhi Gomha
DOI:10.1055/s-0033-1340085
日期:——
simple one-pot method is reported for the synthesis of several novel series of chromeno[4′,3′:4,5]pyrido[2,3-d][1,2,4]triazolo[4,3-a]pyrimidine-6,14-diones, chromeno[4′,3′:4,5]pyrido[2,3-d]thiazolo[3,2-a]pyrimidine-6,14-diones, and chrom-eno[4′′,3′′:4′,5′]pyrido[2′,3′:4,5]pyrimido[2,1-b][1,3]thiazine-6,15-dione by a multicomponent reaction of salicylaldehyde, ethyl acetoacetate, and the appropriate fused
摘要 报道了一种简单的一锅法,用于合成几个新系列的chromeno [4',3':4,5] pyrido [2,3- d ] [1,2,4] triazolo [4,3- a ] pyrimidine-6,14-diones,chromeno [4',3':4,5] pyrido [2,3- d ] thiazolo [3,2 - a ] pyrimidine-6,14-diones和chrom-eno [通过多组分反应4'',3'':4',5'] pyrido [2',3':4,5] pyrimido [2,1- b ] [1,3]噻嗪-6,15-二酮回流冰醋酸中的水杨醛,乙酰乙酸乙酯和适当的稠合杂环胺 通过光谱和元素分析确定了新合成化合物的结构。阐明了单步反应的机理。 报道了一种简单的一锅法,用于合成几个新系列的chromeno [4',3':4,5] pyrido [2,3- d ]