Synthesis of 7-substituted pyrazolo[1,5-a]pyrimidine-3-carboxamides as potential non benzodiazepine hypnotics
作者:Haider Behbehani、Hamada M. Ibrahim、Saad Makhseed
DOI:10.3998/ark.5550190.0011.222
日期:——
A variety of new pyrazolo[1,5-a]pyrimidines has been prepared as potential drugs for the treatment of insomnia. The general synthetic route used for this purpose involves the condensation of substituted cyanoacetamides 5a-c, prepared by reaction of cyanoacetic acid with amines in presence of acetic anhydride, with dimethylformamide dimethylacetal and subsequent treatment of the formed enamines 6 with
多种新型吡唑并[1,5-a]嘧啶已被制备为治疗失眠的潜在药物。用于此目的的一般合成路线包括取代的氰基乙酰胺 5a-c 的缩合反应,通过氰基乙酸与胺在乙酸酐的存在下与二甲基甲酰胺二甲基乙缩醛反应制备,随后用水合肼处理形成的烯胺 6。该过程提供相应的氨基吡唑甲酰胺 9,其与烯氨基腈 12 反应生成目标。通过使用光谱方法,包括 N HMBC 和 NOE 差异实验以及 X 射线晶体学分析,确定了在这些序列中制备的物质的结构。