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
作者:Matam Sivakumar、Kaliyan Prabakaran、Muthu Seenivasa Perumal
DOI:10.1080/00397911.2017.1393688
日期:2018.1.17
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)-thione derivatives 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
摘要描述了酮 1、芳基醛 2 和硫脲 3 在氢氧化钠存在下的一锅三组分类 Beginelli 反应。在该反应中,3,4,5,6-四氢-4-取代的喹唑啉-2(1H)-硫酮衍生物4a-h 以良好的产率(73-85%)获得。化合物 4a 已通过单晶 X 射线分析表征。筛选了所有合成的化合物 4a-h 和 5a-b 的体外抗氧化活性。化合物4c、4e和4h表现出优于标准抗坏血酸。化合物 4d、4f 和 4g 也显示出良好的活性。其余化合物显示中等抗氧化活性。图形概要