5-Bromo-6-fluoro-2-methylquinoline → 5-Bromo-6-fluoro-2-methyl-1,2,3,4-tetrahydroquinoline

Reaction equation

[Br:1][C:2]1[C:11]([F:12])=[CH:10][CH:9]=[C:8]2[C:3]=1[CH:4]=[CH:5][C:6]([CH3:13])=[N:7]2.[H][H]>C(O)(=O)C.[Pt]>[Br:1][C:2]1[C:11]([F:12])=[CH:10][CH:9]=[C:8]2[C:3]=1[CH2:4][CH2:5][CH:6]([CH3:13])[NH:7]2

Participants

Procedure

To a solution of 20 g of 5-bromo-6-fluoroquinaldine in 150 ml of glacial acetic acid was added 2.0 g of platinum on charcoal. The mixture was hydrogenated on a Paar apparatus at a temperature of about 20° C. until the theoretical amount of hydrogen was taken up. The mixture was then filtered through celite to provide a solution of 5-bromo-6-fluoro-1,2,3,4-tetrahydroquinaldine. Evaporation of the solvent provides the desired intermediate. This intermediate could be used directly in Part C below without purification.