6-Chloro-1,2,3,4-tetrahydroquinoline → Methyl 3-(6-chloro-1,2,3,4-tetrahydroquinolin-1-yl)-2-oxo-1,2-dihydroquinoxaline-6-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a solution of methyl 3-chloro-2-oxo-1,2-dihydroquinoxaline-6-carboxylate (1.0 g, 4.19 mmol) in NMP (10.0 ml) was added 6-chloro-1,2,3,4-tetrahydroquinoline (1.20 g, 7.16 mmol) and the reaction was stirred for 1 h at 150° C. in an oil bath. The reaction mixture was cooled down to room temperature, precipitated with water (100 ml). The solids were collected by filtration and dried in an oven under reduced pressure to afford methyl 3-(6-chloro-1,2,3,4-tetrahydroquinolin-1-yl)-2-oxo-1,2-dihydroquinoxaline-6-carboxylate as a gray solid (1.0 g, crude).

Provenance & Evidence