Ethanethiol → HCID 178517708, compound

Participants

Reaction Steps

To a dimethylformamide solution (3.5 mL) of sodium hydride (60% in mineral oil, 58 mg, 1.46 mmol, 2.5 eq) under nitrogen was added ethanethiol (0.108 mL, 1.46 mmol, 2.5 eq) via gas tight syringe. Once gas evolution had ceased, a solution of 1-(9,10-dihydro-9,10-methanoanthracen-9-ylmethyl)-4-(2-methoxy-3-pyridyl)piperidin-4-ol (described in example 32) (240 mg, 0.58 mmol) in dimethylformamide (2.0 mL) was added in a single portion. After the reaction had refluxed for 2 h, it was cooled to room temperature and diluted with water (25 mL). The resulting precipitate was filtered and purified by flash chromatography over silica gel (140 mL, eluent: 15% methanol in methylene chloride) to yield 190 mg (83%) of the title compound as a white solid. TLC analysis (Rf 0.10, 15% methanol in methylene chloride). 1H NMR (CDCl3, 300 MHz) 7.36 (dd, J=2.0, 7.2 Hz, 1H), 7.23 (m, 5H), 6.94 (m,4H), 6.31 (dd, J=6.7, 6.8 Hz, 1H), 5.82 (s, 1H), 4.27 (s, 1H), 3.48 (s, 2H), 2.84 (m, 2H), 2.61 (d, J=1.4 Hz, 1H), 2.00 (m, 2H), 1.89 (m, 2H) MS (CI, CH4) m/z 399 (M+1,100), 427 (M+29,7), 381 (18). The free base was dissolved in methanol/methylene chloride, acidified with ethereal HCl and the hydrochloride salt was precipitated by ether dilution. The salt was filtered, rinsed with fresh diethyl ether, and dried in vacuo (50° C., 75 pascal, 18 h) to yield a white solid, up 195°-199° C.

Provenance & Evidence