p-Toluenesulfonic acid monohydrate → HCID 86601088, compound

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Reaction Steps

A solution of 2-[(S)-N-Boc-pyrrolidin-3-yloxy]-fluoren-9-one (315 mg, 0.863 mmol; Example 4A) and p-toluenesulfonic acid monohydrate (165 mg, 0.868 mmol; Aldrich) in EtOAc (15 mL) was heated to reflux. A precipitate began to form after about 30 min of heating. After 18 h, the mixture was cooled to room temperature and the yellow crystals were collected by filtration to afford the title compound (334 mg, 0.763 mmol; 88% yield): 1H NMR (300 MHz, CD3OD) δ ppm 7.67-7.73 (m, J=8 Hz, 2H), 7.55-7.63 (m, 3H), 7.52 (dt, J=7, 1 Hz, 1H), 7.27 (dt, J=7, 1 Hz, 1H), 7.20-7.24 (m, J=5, 3 Hz, 3H), 7.14 (dd, J=8, 3 Hz, 1H), 5.24-5.30 (m, 1H), 3.44-3.63 (m, 4H), 2.29-2.39 (m, 5H); MS (DCl/NH3) m/z 266 (M+H)+; Anal. C17H15NO2.C7H8O3S: C, H, N.

Provenance & Evidence