Sulfonic acid functionalized Wang resin (Wang-OSO3H) as polymeric acidic catalyst for the eco-friendly synthesis of 2,3-dihydroquinazolin-4(1H)-ones
作者:A.V. Dhanunjaya Rao、B.P. Vykunteswararao、T. Bhaskarkumar、Nivrutti R. Jogdand、Dipak Kalita、Jaydeep Kumar D. Lilakar、Vidavalur Siddaiah、Paul Douglas Sanasi、Akula Raghunadh
DOI:10.1016/j.tetlet.2015.06.004
日期:2015.8
An efficient and green approach has been developed for the synthesis of 2-substituted 2,3-dihydroquinazolin-4(1H)-ones directly from corresponding substituted aromatic and aliphatic aldehyde and anthranilamide using recyclable polymer supported sulfonic acid catalyst under aqueous conditions. Environmental acceptability, operational simplicity, low cost, excellent functional group compatibility, and
'The anti-inflammatory activities of the 2,3-dihydroquinazolin-4(1H)-one derivatives along with results from our in silico predictions (this study) encouraged us to explore this class of compounds as potentialinhibitors of TNF-α. Among all the molecules assessed in silico the best ranked molecules were identified with the order as 3h > 3p > 3l based on the estimated total energy. The compound 3h participated
'2,3-二氢喹唑啉-4(1 H )-酮衍生物的抗炎活性以及我们的计算机预测结果(本研究)鼓励我们探索这类化合物作为 TNF-α 的潜在抑制剂。在计算机评估的所有分子中,根据估计的总能量,排名最好的分子被确定为3h > 3p > 3l的顺序。化合物3h通过其喹唑啉-4(1 H )-一个环的 C = O 基团与链 A 的 TYR151 参与氢键相互作用,此外还通过以下途径与所有关键 TYR 残基相互作用它的氯基。化合物3l和3p也获得了有趣的对接结果。为了获得这类稠合的N -杂芳烃,我们采用了β -环糊精 ( β -CD) 催化方法,涉及 2-氨基苯甲酰胺与醛/酮在纯水中的环缩合反应。各种芳香族、脂肪族和杂芳族醛(包括肉桂醛)与酮一起用于此目的,以良好至极佳的产率提供相应的产物。催化剂β的回收再利用-CD 成功。廉价和环保的性质以及简单的产品纯化和良好的产品收率是这种方法的主要优势。当在体外检查时,抑制
Efficient synthesis of 2,3-dihydroquinazolin-4(1H)-ones catalyzed by titanium silicon oxide nanopowder in aqueous media
作者:Ramamohan Mekala、M. V. Madhubabu、G. Dhanunjaya、Sridhar Regati、K. B. Chandrasekhar、Jayaprakash Sarva
DOI:10.1080/00397911.2016.1254801
日期:2017.1.17
ABSTRACT An efficientsynthesis of 2,3-dihydroquinazolin-4(1H)-one derivatives is accomplished in aqueousmedia by a three-component reaction of isatoic anhydride, primary amines or ammonium acetate, and aldehydes catalyzed by titanium silicon oxide nanopowder. A variety of 2,3-dihydroquinazolin-4(1H)-one derivatives were synthesized using this methodology in good to excellent yields. The catalyst