Two Different Green Catalytic Systems for One-Pot Regioselective and Chemoselective Synthesis of Some Pyrimido[4,5-<i>d</i>]Pyrimidinone Derivatives in Water
作者:Mehdi Rimaz、Jabbar Khalafy、Hossein Mousavi、Sanaz Bohlooli、Behzad Khalili
DOI:10.1002/jhet.2932
日期:2017.11
syntheses of 5‐aryloyl‐1,3‐dimethyl‐7‐thioxo‐5,6,7,8‐tetrahydropyrimido[4,5‐d]pyrimidine‐2,4(1H,3H)‐dione and 5‐aryloyl‐1,3‐dimethyl‐2,7‐dithioxo‐2,3,5,6,7,8‐hexahydropyrimido[4,5‐d]pyrimidin‐4(1H)‐one derivatives via one‐pot three‐component Biginelli‐like condensation of arylglyoxal monohydrates, N,N‐dimethylbarbituric acid or N,N‐dimethyl‐2‐thiobarbituric acid, and thiourea in water at 50°C. The presence
在这项工作中,我们开发了绿色和高效的区域选择性和化学选择性的5-芳基-1,3-二甲基-7-硫代-5,6,7,8-四氢嘧啶基[4,5 - d ]嘧啶-2,4的区域选择性和化学选择性合成(1 H,3 H)-二酮和5-芳酰基-1,3-二甲基-2,7-二硫代-2-,3,5,6,7,8-六氢嘧啶基[4,5 - d ]嘧啶-4在50°C的水中通过一锅三组分Biginelli样缩合的芳基乙二醛一水合物,N,N-二甲基巴比妥酸或N,N-二甲基-2-硫代巴比妥酸和硫脲的1 H)-1衍生物。存在两种不同的绿色催化体系(ZrOCl 2 .8H 2O和DABCO)进行了有效的生产,以良好的产量提供了所需的产品。水性反应介质,高区域选择性和化学选择性,简单的操作和合适的产物收率是这些绿色方案的重要特征。