Synthesis of N-tetra-O-acetyl-β-d-glucopyranosyl-N′-(4′,6′-diarylpyrimidin-2′-yl)thioureas
作者:Nguyen Dinh Thanh、Nguyen Thi Thanh Mai
DOI:10.1016/j.carres.2009.09.002
日期:2009.11
Some 2-amino-4,6-diarylpyrimidines 2 have been prepared from substituted benzylideneacetophenones and guanidine hydrochloride in the presence of alkali by conventional heating in alcoholic medium and microwave heating in solvent-free conditions. N-(2,3,4,6-Tetra-O-acetyl-beta-D-glucopyranosyl)-N'-(4',6'-diarylpyrimidin-2'-yl)thioureas 4 have been synthesized by reaction of per-O-acetylated glucopyranosyl isothiocyanate 1 and substituted 2-amino-4,6-diarylpyrimidines 2. Two different methods have been used, namely, refluxing in anhydrous dioxane and solvent-free microwave-assisted coupling. The second procedure afforded higher yields in much shorter reaction times. The compounds 2 and 4 were tested for their antibacterial and antifungal activities in vitro against Staphylococcus epidermidis, Enterobacter aerogenes and Candida albicans by disc diffusion method. (C) 2009 Elsevier Ltd. All rights reserved.
Reaction of<i>N</i>-(Per-<i>O</i>-acetyl-β-<i>D</i>-glucopyranosyl)-<i>N</i>ʼ-(4ʼ,6ʼ-diarylpyrimidine-2ʼ-yl)thioureas with Ethyl Bromoacetate
作者:Nguyen Dinh Thanh
DOI:10.1155/2011/348479
日期:——
Some new 2-iminothiazolidin-4-ones having pyrimidine ring have been synthesized by reaction of substitutedN-(per-O-acetyl-β-D-glucopyranosyl)-Nʼ-(4ʼ,6ʼ-diarylpyrimidine-2ʼ-yl)thioureas with ethyl bromoacetate. The structure of isomeric products has been confirmed by spectroscopic methods, such as IR,1H and13C NMR.