A novel synthesis of the pyrazolo[1,5-a]quinoline ring system. New N1-C2 bridged DNA gyrase inhibitors via a novel tandem 1,4-conjugate addition-Michael [3+2] annulation process
作者:David Barrett、Hiroshi Sasaki、Takayoshi Kinoshita、Akihiko Fujikawa、Kazuo Sakane
DOI:10.1016/0040-4020(96)00415-2
日期:1996.6
A novel tandem 1,4-conjugate addition-intramolecular Michael addition [3+2] annulation process for synthesis of the pyrazolo[1,5-a]quinoline ring system is described. Reaction of N-methylaminoquinolones with various acrylate derivatives in the presence of NaH leads to pyrazolo[1,5-a]quinolines in excellent yield. Transformation of the adducts into novel N1-C2 bridged tricyclic DNA gyrase inhibitors
描述了一种新颖的串联1,4-共轭加成-分子内迈克尔加成[3 + 2]环化法合成吡唑并[1,5- a ]喹啉环系。N-甲基氨基喹诺酮类与各种丙烯酸酯衍生物在NaH存在下的反应可极好地生成吡唑并[1,5- a ]喹啉。还描述了将加合物转化为新型的N1-C2桥联的三环DNA促旋酶抑制剂。