A novel one-step synthesis of quinolinium salts and 4-quinolones from formanilides
作者:Otto Meth-Cohn、David L Taylor
DOI:10.1016/s0040-4039(00)73654-9
日期:1993.5
N-Methylformanilide in POCl3 reacts readily at 80°C with alkanoamides(RCH2CONR'2) to give 3-R-4-chloroquinolinium salts in good yields. The arylamide reacts as its Vilsmeier salt and the alkanoamide as an α-chloroenamine. High yields of 4-quinolones are easily obtained by base treatment.
N-甲基甲酰苯胺在将POCl 3下进行反应容易地在80℃下用alkanoamides(RCH 2 CONR” 2),得到良好的收率3-R-4-chloroquinolinium盐。芳基酰胺以其维斯迈尔盐形式反应,而链烷酰胺以α-氯烯胺形式反应。通过碱处理容易获得高产率的4-喹诺酮。