Synthesis and Antimicrobial Activity of Some New 1,3-Diphenylpyrazoles Bearing Pyrimidine, Pyrimidinethione, Thiazolopyrimidine, Triazolopyrimidine, Thio-and Alkylthiotriazolop-Yrimidinone Moieties at the 4-Position
作者:T. I. El-Emary、Sh. A. Abdel-Mohsen
DOI:10.1080/10426500600754695
日期:2006.11.1
mixture. The hydrazino derivative 9 was prepared either by boiling 2 and/or 3a with hydrazine. The reaction of 9 with nitrous acid, acetylacetone, triethyl orthoformate, acetic anhydride, and carbon disulfide gave 10–14. The alkylation of 14 with ethyl iodide, phenacyl bromide, and ethyl chloroacetate afforded the alkythiotriazolo pyrimidinone derivatives 15a–c. The dialkyl derivative 16 was produced upon
1,3-二苯基-1H-吡唑-4-甲醛 (1) 与氰乙酸乙酯和硫脲反应得到嘧啶硫酮衍生物 2。2 与一些烷基化剂反应得到相应的硫醚 3a-e 和 7。硫酮 2 是分别与氯乙酸和苯甲醛反应后环化为 5 和 6。硫醚3c在乙醇中与乙酸钠一起沸腾时环化为4,并且7在乙酸酐-吡啶混合物中沸腾时环化为8。肼衍生物9通过用肼煮沸2和/或3a来制备。9与亚硝酸、乙酰丙酮、原甲酸三乙酯、乙酸酐和二硫化碳反应得到10-14。用碘乙烷、苯甲酰溴和氯乙酸乙酯对 14 进行烷基化,得到烷硫基三唑并嘧啶酮衍生物 15a-c。二烷基衍生物16是在用2当量的碘乙烷处理2后产生的。用肼煮沸 16 得到肼基 17。 17 与亚硝酸、二硫化碳、氰乙酸乙酯、乙酰乙酸乙酯和苯甲酰溴反应分别得到 18-22。测试了一些新获得的化合物的抗菌和抗真菌活性。