Synthesis of 1,2,4-Triazol-3-ylmethyl-, 1,3,4-Oxa-, and -Thiadiazol-2-ylmethyl-1H-[1,2,3]-triazolo[4,5-d]pyrimidinediones
作者:Farag A. El-Essawy、Ahmed F. Khattab、Adel A.-H. Abdel-Rahman
DOI:10.1007/s00706-007-0649-7
日期:2007.8
with hydrazine hydrate to give the corresponding hydrazide. The latter hydrazide was treated either with phenylisothiocyanate or with carbon disulfide/alc. KOH to afford the corresponding thiosemicarbazide and oxadiazole derivatives. Alkylation of 2-mercapto-1,3,4-oxadiazole with dimethyl sulfate or ethyl chloroacetate gave the corresponding 2-methylthio-, and 2-ethylthioglycolate derivatives. Formation
合成了1-Carbethoxymethyl-4,6-methyldimethyl-1 H- [1,2,3] triazolo [4,5 - d ] pyrimidine-5,7(4 H ,6 H )-dione并用水合肼处理给出相应的酰肼。后者的酰肼用异硫氰酸苯酯或二硫化碳/ alc处理。用KOH得到相应的硫代氨基脲和恶二唑衍生物。将2-巯基-1,3,4-恶二唑与硫酸二甲酯或氯乙酸乙酯烷基化,得到相应的2-甲硫基和2-乙硫基乙醇酸酯衍生物。1,3,4-噻二唑,5-巯基-1,2,4-三唑和1,3,4-恶二唑的形成通过用浓硫酸处理后一种硫代氨基脲而进行。H 2 SO 4,NaOH / HCl和HgO。用氯乙酸乙酯处理5-巯基-1,2,4-三唑,得到巯基乙酸酯。后者用水合肼水解,得到酰肼衍生物。这些酰肼与单糖醛糖的缩合得到相应的糖。测试了新化合物对乙型肝炎病毒的抗病毒活性,并显示了中等活性。