Reactivity of 7-(2-dimethylaminovinyl)pyrazolo[1,5-<i>a</i>]pyrimidines: Synthesis of pyrazolo[1,5-<i>a</i>]pyrido[3,4-<i>e</i>]pyrimidine derivatives as potential benzodiazepine receptor ligands.<b>1</b>
作者:Fabrizio Bruni、Silvia Selleri、Annarella Costanzo、Gabriella Guerrini、Maria Lucia Casilli
DOI:10.1002/jhet.5570310516
日期:1994.9
of 7-methylpyrazolo[1,5-a]pyrimidines were reacted with dimethylformamide dimethylacetal to give the corresponding dimethylaminovinyl derivatives. These were reacted with ammonium acetate affording, through a ring closure, a number of 6-methylpyrazolo[1,5-a]pyrido[3,4-e]pyrimidines bearing various substituents on the pyrazole ring. The 6-acetyl-2-hydroxy-7-methylpyrazolo[1,5-a]pyrimidine was used as
使一系列的7-甲基吡唑并[1,5- a ]嘧啶与二甲基甲酰胺二甲基乙缩醛反应,得到相应的二甲基氨基乙烯基衍生物。它们与乙酸铵反应,通过闭环反应,得到许多在吡唑环上带有各种取代基的6-甲基吡唑并[ 1,5- a ]吡啶基[3,4- e ]嘧啶。将6-乙酰基-2-羟基-7-甲基吡唑并[1,5- a ]嘧啶用作起始原料,以获得一些O-烷基衍生物。2-苄氧基-6-甲基吡唑并[ 1,5- a ]吡啶基[3,4- e ]嘧啶的催化转移氢化反应生成了2-羟基衍生物。