Ethanol → 4-(Piperidin-4-ylideneaminooxy)-piperidine-1-carboxylic acid tert-butyl ester

Participants

Reaction Steps

To a solution of 4-piperidinone (2.5 mmol) in 25 mL of DCM, was added 69b (0.43 g, 2 mmol). The mixture was stirred at room temperature for 2 h. NaOAc (0.27 g, 2 mmol) and ethanol (10 mL) were added and the reaction mixture was heated at 70° C. for 2 h. The solution was allowed to cool down to room temperature and the ethanol was evaporated. The residue was extracted with ethyl acetate, washed with water, dried and concentrated to give 0.59 g of 69c.

Provenance & Evidence