Sodium cyanoborohydride → HCID 68648374, compound

Participants

Reaction Steps

Add Preparation 10 (5.25 g) to a suspension of imidazolocyclohexy-3-amine hydrochloride (2 gm) (Preparation 8) in methanol (30 mL). Stir the mixture at room temperature for 30 min. Add sodium cyanoborohydride (1 g) and stir the mixture for 2 h. Heat the reaction mixture at 50° C. for 2 h. Dilute the reaction mixture with ethyl acetate (50 mL) and wash the mixture with water (50 mL). Dry ethyl acetate layer over sodium sulfate and concentrate on rotary evaporator to give a crude. Purify the crude by silica flash chromatography eluting with a gradient of 0-5% methanol in DCM to give the product as a mixture of diastereomers, 3-(4-benzyloxy-2,6-dichloro-benzyl)-1-(4,5,6,7-tetrahydro-3H-benzimidazole-3-yl)-pyrrolidin-2-one (4.5 gm). MS: m/z=470 (M+1).

Provenance & Evidence