1-(Diphenylmethyl)azetidin-3-ol → 1-(Diphenylmethyl)azetidin-3-one

Participants

Reaction Conditions

Reaction Steps

The title compound was prepared as described in WO2010079443A1. To a solution of compound 1-benzhydrylazetidin-3-ol (20 g, 28.4 mmol) in the triethyl amine (60 mL) was added a solution of sulfur trioxide pyridine complex (SO3.Py) (40 g, 251.6 mmol) in dimethylsulfoxide (260 mL) under a nitrogen atmosphere at 25° C. The reaction was stirred at 50° C. for 2 h. Then the reaction mixture was cooled back to 25° C., diluted with water (500 mL), and extracted with ethyl acetate (2×500 mL). Organic part was dried over sodium sulfate, filtered, and concentrated under a vacuum to give a crude compound which was further purified by column chromatography using silica gel (100 to 200 mesh) eluting with 0% to 20% ethyl acetate in hexanes to provide 1-benzhydrylazetidin-3-one (11.7 g) as a white solid. MS (ESI, positive ion) m/z (M+1): 238.30. 1H NMR (400 MHz, DMSO) δ 7.50 (d, J=7.5 Hz, 4H), 7.30 (t, J=7.5 Hz, 4H), 7.20 (t, J=7.3 Hz, 2H), 4.82 (s, 1H), 4.00 (s, 4H).

Provenance & Evidence