Catalyst-Free Multicomponent Formation of Novel Acylpyrrole-Containing 6-Iminohexahydro-1H-pyrido[1,2-a]pyrimidine Derivatives
摘要:
A simple and green synthesis of acylpyrrole-containing 6-iminohexahydro-1H-pyrido[1,2-a]pyrimidine derivatives were successfully prepared via four-component reaction of 1,1-bis(methylthio)-2-nitroethene, propane-1,3-dianiine, 3-(1-methyl-1H-pyrrol-2-yl)-3-oxopropanenitrile and aromatic aldehydes in ethanol under microwave irradiation. This method offers several significant advantages, including green solvent, avoidance of catalysts, high-speed reaction, outstanding selectivity, tremendous substrate diversity and no column chromatographic purification.