Base-mediated one-pot synthesis of 3,4,5,6-tetrahydro-4-substituted benzo[<i>h</i>]quinazoline-2(1<i>H</i>)-thione derivatives and evaluation of their antioxidant activity
ABSTRACT One-pot three-component Beginelli-like reactions of a ketone 1, an aryl aldehyde 2, and thiourea 3 in the presence of sodium hydroxide are described. In this reaction, 3,4,5,6-tertrahydro-4-substituted quinazoline-2(1H)-thionederivatives 4a–h were obtained in good yields (73–85%). The compound 4a has been characterized by single crystal X-ray analysis. All the synthesized compounds 4a–h and
A novel and efficient one-pot method to Biginelli-like scaffolds
作者:M. Mirza-Aghayan、A. Moradi、M. Bolourtchian
DOI:10.1007/bf03245888
日期:2010.3
A novel and efficient one-pot method for the preparation of fused ring 3,4-dihydropyrimidin-2(1H)-ones and thiones from cyclocondensation of aldehydes, cyclic ketones and urea or thiourea using a catalytic amount of cupric chloride under mild conditions reaction is described. This new method has the advantage to give high yields, to be completed in short reaction times and simple product isolation
FeCl3∙6H2O/TMSBr-Catalyzed Rapid Synthesis of Dihydropyrimidinones and Dihydropyrimidinethiones under Microwave Irradiation
作者:Fei Zhao、Xiuwen Jia、Pinyi Li、Jingwei Zhao、Jun Huang、Honglian Li、Lin Li
DOI:10.3390/molecules22091503
日期:——
dihydropyrimidinethiones through FeCl3∙6H2O/TMSBr-catalyzed three-component cyclocondensation undermicrowaveirradiation. This approach features high yields, broad substrate scope, short reaction time, mild reaction conditions, operational simplicity and easy work-up, thus affording a versatile method for the synthesis of dihydropyrimidinones and dihydropyrimidinethiones.