反应详情

A solution of 5,6-dimethyl-1-[1-(phenylmethyl)-1,2,3,6-tetrahydro-4-pyridinyl]-1,3-dihydro-2H-benzimidazol-2-one (D99) (1.05 mmol, 350 mg) in ethanol (10 mL) and acetic acid (2 mL) was treated with 10% palladium on charcoal (0.25 eq wt, 90 mg) then shaken under 50 PSI of hydrogen pressure for 24 h. The catalyst was filtered off and the filtrate was concentrated under reduced pressure to give the acetate salt of the title compound also containing some saturated analogue (reduction of the C═C double bond in the piperidine core) as a beige solid (1.2 mmol, 370 mg, >100% yield) M+H 246.2, M−H 242.3.

1. filtrationThe catalyst was filtered off
2. concentrationthe filtrate was concentrated under reduced pressure