Ethyl 1-cyanocyclohexane-1-carboxylate → Ethyl 1-[(benzoylamino)methyl]cyclohexanecarboxylate

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Reaction Steps

A solution of ethyl 1-cyanocyclohexanecarboxylate (10.0 g, 55.1 mmol) in ethanol (200 ml) was stirred at 40° C. for 12 hrs., in the presence of Raney-nickel (10 g), under a hydrogen atmosphere (4 atm). The catalyst was filtered off, and the filtrate was concentrated under reduced pressure. Ethyl acetate (300 ml) and 10% aqueous sodium carbonate solution (150 ml) were added to the residue, benzoyl chloride (6.34 ml, 55.1 ml) was added dropwise at 0° C., and the mixture was stirred at room temperature for 6 hrs. The organic layer was separated, and the aqueous layer was extracted with ethyl acetate. The organic layers were combined and dried over anhydrous MgSO4. After concentration under reduced pressure, the residue was subjected to silica gel column chromatography and eluted with hexane-ethyl acetate (3:1-1:1, v/v) to give the title compound (10.2 g, 63%) as a colorless oil.

Provenance & Evidence