PEG-400 mediated an efficient eco-friendly synthesis of new isoxazolyl pyrido[2,3-<i>d</i>]pyrimidines and their anti-inflammatory and analgesic activity
作者:Srinivasa Rao Dasari、Subbaiah Tondepu、Lakshmana Rao Vadali、Nareshvarma Seelam
DOI:10.1080/00397911.2020.1787449
日期:2020.10.1
pyrido[2,3-d]pyrimidines 11 in good to excellent yields. The newly synthesized compounds 10 and 11 were characterized by IR, 1H NMR, 13C NMR, and HRMS analysis. The target compounds 11a-x was screened for their anti-inflammatory and analgesic activities. Among the tested compounds, the compounds 11s, 11t, 11u, 11v, 11w, and 11x showed significant anti-inflammatory and potent analgesic activities as that
摘要 聚乙二醇-400 (PEG-400) 已被开发为一种高效、环保的反应介质,用于从异恶唑基氰基乙酰胺合成子 7 合成新的异恶唑基吡啶并[2,3-d]嘧啶衍生物 11。化合物 7 与在三乙胺 (Et3N) 存在下,各种芳香醛 8 和丙二腈 9 得到相应的 (E)-6-amino-1-(3-methyl-5-styrylisoxazol-4-yl)-2-oxo-4-phenyl -1,2-dihydro-pyridine-3,5-dicarbonitrile 10 在室温下使用 PEG-400 作为溶剂介质和催化剂。中间体 10 在 PEG-400 存在下在 90°C 下用硫脲处理,得到目标化合物异恶唑基吡啶并 [2,3-d] 嘧啶 11,收率良好至极好。新合成的化合物10和11通过IR、1H NMR、13C NMR和HRMS分析表征。筛选了目标化合物 11a-x 的抗炎和镇痛活性。在受试