HCID 59850190, compound → HCID 59850141, compound

Participants

Reaction Steps

A solution of 5,6-difluoro-1-[1-(phenylmethyl)-1,2,3,6-tetrahydro-4-pyridinyl]-1,3-dihydro-2H-benzimidazol-2-one (D88) (0.7 mmol, 240 mg) in ethanol (10 mL) and acetic acid (2 mL) was treated under argon with 10% palladium on charcoal (50 mg, ˜0.25 eq wt) and the mixture was stirred overnight under 25-30 PSI, then 8 h under 50 PSI of hydrogen at room temperature. The mixture was concentrated under reduced pressure to give a yellow/orange oil which crystallized with a touch of methanol (from evaporation of the methanol). The residue was dissolved again in 10 mL ethanol and 2 mL of acetic acid, then 50 mg of palladium on charcoal was added again under argon and the mixture was stirred under 50 PSI of hydrogen for 9 days, until completion of the reaction. The mixture was concentrated under reduced pressure to give the title compound as the acetate salt. M+H 254.2, M−H 252.2

Provenance & Evidence