A facile, regioselective synthesis of pyrazolo[1, 5-a]pyrimidine analogs in the presence of KHSO4 in aqueous media assisted by ultrasound and their anti-inflammatory and anti-cancer activities
作者:Shunan Kaping、Utpalparna Kalita、Melboureen Sunn、Laishram Indira Singha、Jai Narain Vishwakarma
DOI:10.1007/s00706-015-1638-x
日期:2016.7
5-a]pyrimidine derivatives under ultrasound irradiation assisted by KHSO4 in aqueous medium. 3-(4-Methoxyphenyl)-3-oxopropanenitrile reacted with hydrazine hydrate in refluxing ethanol to give 5-(4-methoxyphenyl)-1H-pyrazol-3-amine. Condensation of 3-aminopyrazoles with formylated active proton compounds furnished pyrazolopyrimidines in high to excellent yield. The chemical structure and regioselectivity
摘要描述了一种环境友好,简单,有效和方便的方法,该方法用于在水性介质中在KHSO 4辅助的超声辐射下合成新型吡唑并[1,5- a ]嘧啶衍生物。3-(4-甲氧基苯基)-3-氧代丙烷腈与水合肼在回流的乙醇中反应,得到5-(4-甲氧基苯基)-1 H-吡唑-3-胺。3-氨基吡唑与甲酰化的活性质子化合物的缩合以高至优异的产率提供了吡唑并嘧啶。通过IR,1 H NMR,13确认合成的化合物的化学结构和区域选择性1 H NMR和质谱数据。对所选化合物进行了X射线晶体学研究。此外,筛选了这些合成的化合物的抗炎和抗癌活性,结果令人鼓舞。该方案的主要优点是收率高,操作简单,反应时间短,并且没有苛刻的反应条件。 图形概要