Chloroacetyl chloride → 2-Chloro-1-(3-hydroxyazetidin-1-yl)ethan-1-one

Participants

Reaction Steps

To a suspension of potassium carbonate (13.9 g, 100 mmol, 2.2 eq.) in water (33.5 mL) was added hydroxyazetidine hydrochloride (5 g, 45.6 mmol, 1 eq.). The reaction mixture was stirred at r.t. until complete dissolution, then diluted with 33.5 mL of DCM and cooled to 0° C. prior to the dropwise introduction of chloroacetyl chloride (4.4 mL, 54.8 mmol, 1.2 eq.) over 30 min After 2 h stirring at r.t., the reaction mixture was filtered, the organic layer was separated, and the aqueous phase was extracted with a mixture EtOAc/nBuOH 1:1 (6×16 mL). The combined organic layers were dried over Na2SO4, filtered and concentrated in vacuo. The residue was suspended in acetone (48 mL) and stirred vigorously for 20 min, filtered and the filtrate was concentrated in vacuo to afford Intermediate Gen-13-a.

Provenance & Evidence