Synthesis of New Imidazolidine and Tetrahydropyrimidine Derivatives

Abstract

Synthesis of new imidazolidine and tetrahydropyrimidine derivatives 3a, b and 4a-c as cyclic 1,3-diamines under two reaction conditions (A and B) is described. Under reaction conditions-A, a suspension of (E)-2-cyano-2-(oxazolidin-2-ylidene)ethanethioamide 1 (1 eq.) and diaminoalkanes 2a-e (2 eq.) in absolute ethanol is heated under reflux for 16-22 h to afford 3a, b and 4a-c. Alternatively, under reaction conditions-B, a solution of thioamide 1 (1 eq.) in diaminoalkanes 2a-e (3 eq.) is stirred under solvent-free conditions at room temperature for 3 days to give desired products. Reaction conditions-A for having higher yields, shorter reaction times, and required less diamines is more effective than reaction conditions-B. Oxazolidine ring opening is observed by reacting compound 1 with all of the diamines 2a-e, but the thioamide group only reacts with nonbulky diamines 2a, b. The chemical structures of novel compounds were confirmed by 1 H NMR, 13 C NMR, elemental analysis, and FT-IR spectrometry.

Microwave Assisted Synthesis of Tetrahydropyrmidine and in Silico Screening of Antidiabetic Drug

“…Tetrahydropyrimidine derivative synthesis based on the bignelli condensation prepared on microwave assistant [6]. Tetrahydropyrimidine derivatives can act as anthelmintics [7], antiparasitic [8], antibacterial [9] and show muscarinic activity [10]. The concept of green synthesis principle have made more attention of fine chemicals and pharmaceutical industries on preparation of organic products.…”