Ethyl 4-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)benzoate → Ethyl 4-(4-oxopiperidin-1-yl)benzoate

Participants

Reaction Steps

A solution of Example 158A (6.31g, 21.7 mmol) and 30% aqueous acetic acid (100 mL) in TMF (50 mL) was stirred at 95° C. for 6 hours, cooled to room temperature, concentrated, treated with water, and extracted with dichloromethane. The combined extracts were washed with water and brine, dried (MgSO4), filtered, and concentrated to provide the desired product. MS (DCI) m/e 248 (M+H)+.

Provenance & Evidence