Mannich Reaction as a New Route for the Synthesis of Tetrahydro Pyrimido Benzimidazolyl Coumarins
作者:Madhura V.、Manohar V. Kulkarni、Amol Shah、Kallanagouda R. Alagawadi
DOI:10.1002/jhet.1832
日期:2014.11
Condensation of coumarin‐4‐acetic acids (1) with ortho‐phenylenediamine (2) in anhydrous phosphoric acid afforded 4‐((1H‐benzo[d]imidazol‐2‐yl)methyl)‐2H‐chromen‐2‐ones (3). Attempted Mannich reaction of 3 with formalin and primary amines resulted in 4‐(2‐phenyl‐1,2,3,4‐tetrahydrobenzo[4,5]imidazo[1,2‐c]pyrimidin‐4‐yl)‐2H‐chromen‐2‐ones (6). The structures of synthesized compounds were elucidated by
香豆素-4-乙酸(1)与邻苯二胺(2)在无水磷酸中的缩合得到4-((1 H-苯并[ d ]咪唑-2-基)甲基)-2- H-铬-2-一个(3)。尝试的3与福尔马林和伯胺的曼尼希反应导致4-(2-苯基-1,2,3,4-四氢苯并[4,5]咪唑[1,2 - c ]嘧啶-4-基)-2- H -chromen-2-ones(6)。通过包括2D HETCOR和DEPT实验在内的分析阐明了合成化合物的结构。合成的化合物具有抗炎活性。化合物6j 具有良好的抗炎活性。