A Synthesis of 4-Quinolone-3-carboxylic Acids via Pyrolysis of N-Aryldioxopyrrolines
作者:Kunihiko Mohri、Akihiko Kanie、Yoshie Horiguchi、Kimiaki Isobe
DOI:10.3987/com-99-8629
日期:——
A synthesis of 4-quinolone-3-carboxylic acids (8) was achieved by pyrolysis of 4,5-dimethoxycarbonyl-1-aryl-1H-pyrrole-2,3-diones (3) followed by selective demethoxycarbonylation of the resulting 2,3-dimethoxycarbonyl-4-quinolones (4) in excellent overall yields.