反应详情

A solution of methyl 1,2,3,4-tetrahydroquinoline-4-carboxylate (51.0 g) in tetrahydrofuran (THF, 200 ml) was heated under refluxing and a solution of oxalyl chloride (30 ml) in dry THF was added thereto. The mixture was refluxed for 4 hours, then cooled and concentrated. The residue was dissolved in carbon disulfide (800 ml) and aluminum chloride (66.7 g) was added portionwise. The mixture was refluxed for 4 hours, and then allowed to stand overnight. The solvent was eliminated by decantation and to the residue was added ice-water (1 litter). The mixture was extracted with chloroform. The chloroform layer was washed well with water, dried over anhydrous sodium sulfate and concentrated to give the title compound (55.15 g, 83.3%) which was recrystallized from acetonitrile to dark red crystals, mp 135° C.-136° C.

1. temperatureunder refluxing
2. temperatureThe mixture was refluxed for 4 hours
3. temperaturecooled
4. concentrationconcentrated
5. dissolutionThe residue was dissolved in carbon disulfide (800 ml)
6. additionaluminum chloride (66.7 g) was added portionwise
7. temperatureThe mixture was refluxed for 4 hours
8. additionwas added ice-water (1 litter)
9. extractionThe mixture was extracted with chloroform
10. washThe chloroform layer was washed well with water
11. dry with materialdried over anhydrous sodium sulfate
12. concentrationconcentrated