Synthesis and Antimicrobial Activity of Some New Pyrazole, Fused Pyrazolo[3,4-d]-pyrimidine and Pyrazolo[4,3-e][1,2,4]- triazolo[1,5-c]pyrimidine Derivatives
作者:Nada Abunada、Hamdi Hassaneen、Nadia Kandile、Omar Miqdad
DOI:10.3390/molecules13071501
日期:——
4,5-tetrasubstituted pyrazole derivatives 5-12a,b. Reaction of 12a,b with formamide, formic acid and triethyl orthoformate give the pyrazolo[3,4-d]pyrimidine, pyrazolo[3,4-d]pyrimidin-4(3H)one and 5-ethoxymethylene-aminopyrazole-4-carbo-nitrile derivatives 13-15a,b, respectively. Compounds 15a,b reacted with benzhydrazide and hydrazine hydrate to afford pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidine
腙溴化物 2a、b 与活性亚甲基化合物(二苯甲酰甲烷、乙酰丙酮、乙酰乙酸乙酯、苯甲酰氰、乙酰乙酰苯胺、氰乙酸乙酯、氰基乙酰胺和丙二腈)反应,得到相应的 1,3,4,5-四取代吡唑衍生物 5-12a . 12a,b 与甲酰胺、甲酸和原甲酸三乙酯反应得到吡唑并[3,4-d]嘧啶、吡唑并[3,4-d]嘧啶-4(3H)酮和5-乙氧基亚甲基-氨基吡唑-4-碳-腈衍生物分别为 13-15a,b。化合物15a、b与苯甲酰肼和水合肼反应得到吡唑并[4,3-e][1,2,4]三唑并[1,5-c]嘧啶和[4-亚氨基吡唑并-[3,4-d]嘧啶-5-基]胺衍生物16a,b和17a,b。化合物 17a,b 与原甲酸三乙酯和二硫化碳反应得到相应的吡唑并[4,3-e]-[1,2,4]三唑并[1,