Microwave assisted synthesis of β-keto thioethers and furan derivatives by thiol directed multicomponent reactions
作者:Asim Jana、Prabhas Bhaumick、Lokman H. Choudhury
DOI:10.1039/d0nj00587h
日期:——
instead of the corresponding β-keto thioethers 4. We also have developed an FeCl3 catalyzed cyclization reaction of β-keto thioethers (4) for the synthesis of fused furans (7) under microwave heating conditions. The present work demonstrates how the substituents of thiols and arylglyoxals influence the results of the three-component reaction of arylglyoxal, thiol and cyclic 1,3-dicarbonyls under acidic
通过芳基乙二醛,环状1,3-二碳基和硫醇在乙酸介质中,微波加热条件下的快速三组分反应,制备了一系列与环1,3-二羰基连接的β-酮硫醚(4)。有趣的是,在相似的反应条件下,苯乙二醛水合物,4-羟基香豆素与一些硫醇如4-甲氧基硫代苯酚,2-巯基苯并噻唑和2-羟基硫代苯酚的反应提供了蝴蝶状的四取代呋喃(5),而不是相应的β-酮硫醚4。我们还开发了FeCl 3催化的β-酮硫醚的环化反应(4)用于合成呋喃(7))在微波加热条件下。本工作证明了在酸性条件下硫醇和芳基乙二醛的取代基如何影响芳基乙二醛,硫醇和环状1,3-二羰基的三组分反应的结果。