فهرست نشریات علمی دسترسی آزاد ایران

In this work, efficient and high-yielding green synthesis of 3,4‐dihydropyrimidin‐2‐(1 H )‐ones and 3,4‐dihydropyrimidin‐2‐(1 H )‐thiones was achieved by a one-pot three-component reaction between aldehydes, ethyl acetoacetate, and urea/thiourea, using a recyclable mesoporous nanocatalyst entitled nano- N , N , N' , N' -tetramethyl- N -(silica-n-propyl)- N' -sulfo-ethane-1,2-diaminium chloride (nano-[TSPSED][Cl] 2 ). High yields, short reaction times, solvent-free conditions, easy purification of the products, compliance with green chemistry protocols and recyclability of the catalyst are the benefits of this work. The products were obtained in 80-98 % yields and in 10-45 min.