PEG-400 promoted a simple, efficient and eco-friendly synthesis of functionalized novel isoxazolyl pyrido[2,3-<i>d</i>]pyrimidines and their antimicrobial and anti-inflammatory activity
作者:Nallamothu Vanaja Rani、Ravindhranath Kunta
DOI:10.1080/00397911.2021.1871759
日期:——
condition afforded the target products isoxazolyl pyrido[2,3-d]pyrimidines 11 in good to excellent yields. The target compounds 11a-y was also evaluated for their antimicrobial and anti-inflammatory activities. Among the tested compounds, the compounds 11w, 11x, and 11y showed significant antimicrobial activity and potent anti-inflammatory activity as that of standard drugs. The superiority of this method
摘要 一个简单的,高效的,成本有效和新异恶唑基吡啶并环保合成[2,3- d ]嘧啶衍生物11已经从4-氨基-3-甲基-5- styrylisoxazoles开发7通过使用聚乙二醇-400(PEG -400)作为溶剂和催化剂。在PEG-400存在下,用-2-氯烟酸甲酯8处理化合物7,得到相应的(E)-甲基-2-(((3-甲基-5-styrylisoxazol-4-yl)氨基)烟酸酯9,该化合物在加热条件下,在PEG-400存在下,用不同的芳基异硫氰酸酯10进一步处理,得到目标产物异恶唑基吡啶基[2,3- d]嘧啶11的收率高至优异。还评估了目标化合物11a-y的抗微生物和抗炎活性。在测试的化合物中,化合物11w,11x和11y与标准药物相比具有显着的抗菌活性和有效的抗炎活性。该方法的优点是无催化剂,操作简便,环境安全。不含金属,底物范围广,易于纯化,高收率,并且可以回收和再利用PEG-400。