Nano-N,N,N',N'-tetramethyl-N-(silica-n-propyl)-N'-sulfo-ethane-1,2-diaminium chloride as an efficient and recyclable catalyst for the green synthesis of 3,4‐dihydropyrimidin‐2‐(1H)‐ones/thiones
Journal: Asian Journal of Green Chemistry (Vol.5, No. 1)Publication Date: 2021-01-01
Authors : Roghayyeh Khanivar; Abdolkarim Zare; Masoud Sadeghi-Takallo;
Page : 1-11
Keywords : Nanocatalyst Nano-N; N; N'; N'-tetramethyl-N-(silica-n-propyl)-N'-sulfo-ethane-1; 2-diaminium chloride (nano-[TSPSED][Cl]2) 3; 4‐Dihydropyrimidin‐2‐(1H)‐one 3; 4‐Dihydropyrimidin‐2‐(1H)‐thione; Solvent-free;
Abstract
In this work, efficient and high-yielding green synthesis of 3,4‐dihydropyrimidin‐2‐(1H)‐ones and 3,4‐dihydropyrimidin‐2‐(1H)‐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.
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