An Efficient and Concise Synthesis of N-3-Substituted 9-Methoxy-4H-[1]-benzopyrano[2,3-d]pyrimidine-4(5H)-imines and Formamidine Derivatives from Methyl N-(3-Cyano-8-methoxy-4H-[1]-benzopyran-2-yl)methanimidate
作者:Houcine Ammar、Jean-Pierre Bazureau、Ali Bouattour、Mehdi Fakhfakh、Souhir Abid、Ludovic Paquin
DOI:10.1055/s-0036-1588825
日期:2017.8
A four-step microwave-assisted reaction of N-3-susbstituted 4H-[1]-benzopyrano[2,3-d]pyrimidine-4(5H)-imines and formamidine derivatives was successfully developed from primary amines, cyclic secondary amines, and methyl N-(3-cyano-8-methoxy-4H-[1]-benzopyran-2-yl)methanimidate as key intermediate. The simplicity of the microwave protocols gave facile possibilities of isolation of the desired products
摘要 由伯胺,环状仲胺成功开发了N-3-取代的4 H- [1]-苯并吡喃并[2,3 - d ]嘧啶-4(5 H)-亚胺与甲am衍生物的四步微波辅助反应胺和N-(3-氰基-8-甲氧基-4 H- [1]-苯并吡喃-2-基)甲基亚氨基甲酸甲酯作为关键中间体。微波协议的简单性提供了通过简单过滤分离所需产物的简便可能性。以高收率和纯度获得合成的化合物,并通过1 H,13 C NMR,IR和HRMS分析对其进行表征。 由伯胺,环状仲胺成功开发了N-3-取代的4 H- [1]-苯并吡喃并[2,3 - d ]嘧啶-4(5 H)-亚胺与甲am衍生物的四步微波辅助反应胺和N-(3-氰基-8-甲氧基-4 H- [1]-苯并吡喃-2-基)甲基亚氨基甲酸甲酯作为关键中间体。微波协议的简单性提供了通过简单过滤分离所需产物的简便可能性。以高收率和纯度获得合成的化合物,并通过1 H,13 C NMR,IR和HRMS分析对其进行表征。