Abstract
The reaction of 6-(2-methylpropyl or 2-phenylpropyl)-2-thiouracil-5-carbonitriles (4a,b) with various arylmethyl halides, 2-bromoethyl methyl ether, benzyl chloromethyl ether, and 2-bromomethyl-5-nitrofuran in N,N-dimethylformamide or acetone yielded the corresponding substituted thio-3,4-dihydro-4-oxopyrimidine-5-carbonitrile analogues 5a–h, 6a,b, 7, and 8a,b, respectively. Treatment of 5c with phosphorus oxychloride and N,N-dimethylaniline yielded the 4-chloropyrimidine derivative 9, which was allowed to react with various arylthiols, arylamines, and 1-substituted piperazines to yield the respective 4-arylthio 10a–d, 4-arylamino 11a–d, and 4-piperazino 12a,b derivatives. The newly synthesized compounds were tested for in vitro activities against a panel of Gram-positive and Gram-negative bacteria and the yeast-like pathogenic fungus Candida albicans. Compounds 5e, 5f, 5g,h, 7, 8a,b, and 12a display marked antibacterial activity, particularly against the Gram-positive bacteria. None of these compounds are active against C. albicans.
摘要:6-(2-甲基丙基或2-苯基丙基)-2-硫代尿嘧啶-5-碳腈(4a,b)与各种芳基甲基卤化物、2-溴乙基甲醚、苄氯甲基醚和2-溴甲基-5-硝基呋喃在N,N-二甲基甲酰胺或丙酮中反应,产生相应的取代硫代-3,4-二氢-4-氧基嘧啶-5-碳腈类似物5a-h,6a,b,7和8a,b。将5c与氯化磷酸和N,N-二甲基苯胺处理,得到4-氯嘧啶衍生物9,然后与各种芳基硫醇、芳基胺和1-取代哌嗪反应,得到相应的4-芳基硫10a-d,4-芳基胺11a-d和4-哌嗪12a,b衍生物。新合成的化合物被用于对一系列革兰氏阳性和阴性细菌以及类似酵母病原真菌白色念珠菌的体外活性进行测试。化合物5e,5f,5g,h,7,8a,b和12a表现出明显的抗菌活性,特别是对革兰氏阳性细菌。这些化合物中没有一个对白色念珠菌具有活性。