Sodium Hydroxide → 4-(Morpholin-4-ylcarbonyl)-1-(propylsulfonyl)piperidine-4-carbonitrile

Participants

Reaction Steps

To a solution of 4-(morpholin-4-ylcarbonyl)piperidine-4-carbonitrile hydrochloride (I-3) (10.40 g, 40 mmole) in DIEA-DCM (1:4, 200 mL) was added n-C3H7SO2Cl (6.28 g, 44 mmole) at 0° C. The resultant mixture was stirred for 1 h at 0° C. After this time, LCMS indicated that the reaction was complete. 2N NaOH (60 mL) was added to the reaction. The resultant reaction mixture was stirred for 1 h at rt. After this time, the DCM layer was separated. The aqueous solution was extracted with DCM (3×150 mL). The combined DCM solution was washed with brine, dried over MgSO4, filtered, and concentrated to afford the title compound (I-4) which was pure enough for next step reaction. Analytical LCMS: single peak (214 nm), 2.406 min.

Provenance & Evidence