反应详情

To a stirred suspension of dimethyl-7-chloro-4-hydroxyquinoline-2,3-dicarboxylate (3.90 g, 13.3 mM) and 4-methylphenylhydrazine hydrochloride (14.8 g, 93.2 mM) in ethanol (140 mL) was added triethylamine (14.8 mL, 106.4 mM). The resulting brown solution was refluxed for 16 hours during which time a precipitate formed. The resulting suspension was cooled to room temperature and filtered to give the 4-methylphenylhydrazine salt of the title compound as a grey powder (2.30 g). This material was refluxed in glacial acetic acid (45 mL) for 2 hours and cooled to room temperature. The resulting brown suspension was filtered to give the title compound (1.60 g, 34%) as a tan powder, mp 380-382° C.; MS(CI): 354 (M+H).

1. temperatureThe resulting brown solution was refluxed for 16 hours during which time a precipitate
2. customformed
3. filtrationfiltered