Catalytic Action of Azolium Salts. IX. Synthesis of 6-Aroyl-9H-purines and Their Analogues by Nucleophilic Aroylation Catalyzed by Imidazolium or Benzimidazolium Salt.
A silver catalyzed cyclization of acetylene amine was developed to synthesize 4,6-substituted pyrrolo[3,2-d]pyrimidine, a bioactive isosteric scaffold of purine. Starting from simple commercially available acetylenes and pyrimidines, the method was found to be compatible with wide chemical functionalities, leading to a series of pyrrolo[3,2-d]pyrimidines in 84–91% yields.
开发了银催化的乙炔胺环化反应,以合成4,6-取代的吡咯并[3,2- d ]嘧啶,一种嘌呤的生物活性等排骨架。从简单的市售乙炔和嘧啶开始,发现该方法与广泛的化学功能兼容,从而导致一系列吡咯并[3,2- d ]嘧啶,收率84-91%。