描述了2-氨基嘧啶,醛和异腈之间MCR的可靠便捷方法。基于机理推理,选择甲苯作为反应溶剂。发现产物混合物在每种情况下均包含单个咪唑并[1,2- a ]嘧啶产物,将其分离并通过沉淀和结晶纯化。从滤液中进行色谱回收,使总收率提高到49-66%。该方法为迄今报道的观察到多种产物形成的方法提供了一种实用的替代方法。
描述了2-氨基嘧啶,醛和异腈之间MCR的可靠便捷方法。基于机理推理,选择甲苯作为反应溶剂。发现产物混合物在每种情况下均包含单个咪唑并[1,2- a ]嘧啶产物,将其分离并通过沉淀和结晶纯化。从滤液中进行色谱回收,使总收率提高到49-66%。该方法为迄今报道的观察到多种产物形成的方法提供了一种实用的替代方法。
Multi-component reactions between 2-aminopyrimidine, aldehydes and isonitriles: the use of a nonpolar solvent suppresses formation of multiple products
作者:Vladislav Z. Parchinsky、Olga Shuvalova、Olga Ushakova、Dmitry V. Kravchenko、Mikhail Krasavin
DOI:10.1016/j.tetlet.2005.11.152
日期:2006.2
A reliable and convenient protocol for MCRs between 2-aminopyrimidine, aldehydes and isonitriles is described. Toluene was chosen as the reaction solvent based on mechanistic reasoning. The product mixtures were found to contain a single imidazo[1,2-a]pyrimidine product in each case, which were isolated and purified by precipitation and crystallization. Chromatographic recovery from filtrates raised
描述了2-氨基嘧啶,醛和异腈之间MCR的可靠便捷方法。基于机理推理,选择甲苯作为反应溶剂。发现产物混合物在每种情况下均包含单个咪唑并[1,2- a ]嘧啶产物,将其分离并通过沉淀和结晶纯化。从滤液中进行色谱回收,使总收率提高到49-66%。该方法为迄今报道的观察到多种产物形成的方法提供了一种实用的替代方法。