Verjuice as a green and bio-degradable solvent/catalyst for facile and eco-friendly synthesis of 5-arylmethylenepyrimidine-2,4,6-trione, pyrano[2,3-d]pyrimidinone and pyrimido[4,5-d]pyrimidinone derivatives
作者:Niloufar Safari、Farhad Shirini、Hassan Tajik
DOI:10.1007/s13738-018-1565-y
日期:2019.4
of the synthesis of 5-arylmethylenepyrimidine-2,4,6-triones, via Knovenagel condensation reaction between barbituric or thiobarbituric acid and aldehydes. Verjuice is also employed for the effective synthesis of pyrano[2,3-d]pyrimidinone derivatives via a three-component reaction of barbituric acid or its thio analogue, aldehydes and malononitrile. In the same way, pyrimido[4,5-d]pyrimidinone derivatives
Verjuice(未成熟的葡萄汁)是一种有机酸的天然混合物,可通过pH值和TGA分析鉴定,可通过Knovenagel缩合有效地用于促进5-芳基亚甲基嘧啶-2,4,6-三酮的合成。巴比妥酸或硫代巴比妥酸与醛之间的反应。Verjuice还用于通过巴比妥酸或其硫代类似物,醛和丙二腈的三组分反应有效合成吡喃并[2,3- d ]嘧啶酮衍生物。同样,嘧啶基[4,5- d]嘧啶酮衍生物可简单地通过巴比妥酸,醛与脲或硫脲在果汁中的反应来制备。这种绿色方法学具有显着的优势,包括操作简单,可接受的反应时间,易于后处理,高收率,避免在反应和后处理过程中使用任何昂贵的起始原料,挥发性和有害有机溶剂以及使用天然,低成本,可重复使用且可生物降解的催化剂。