Sulphonated graphene oxide catalyzed continuous flow synthesis of pyrazolo pyrimidinones, sildenafil and other PDE-5 inhibitors
作者:Vinay Kumar Sthalam、Bhushan Mahajan、Purushotham Reddy Karra、Ajay K. Singh、Srihari Pabbaraja
DOI:10.1039/d1ra08220e
日期:——
Sulphonated graphene oxide was used for cascade condensation and cyclization reactions towards accessing substituted pyrazolo pyrimidinones. Further, sulphonation and amination reactions were integrated through continuous flow chemistry to access PDE-5 inhibitors. Herein, we report a simple continuous synthetic platform that reduce tedious manual operations and accelerate the synthesis of several potent
磺化氧化石墨烯用于获得取代的吡唑并嘧啶酮的级联缩合和环化反应。此外,通过连续流动化学整合磺化和胺化反应以获得 PDE-5 抑制剂。在此,我们报告了一个简单的连续合成平台,可减少繁琐的手动操作并加速几种有效的 5 型磷酸二酯酶抑制剂的合成。开发的平台使我们能够在 32.3 分钟的反应时间内执行单流程多步骤、多操作过程来合成 PDE-5 抑制剂,如西地那非及其类似物,而人为干预最少,使用单一溶剂。