thietan-3-amine

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 2-methyl-4-{methylsulfanyl-[(Z)-trimethylsilanyl methylimino]methyl}-benzoic acid (Example I18) (107 mg) in dichloromethane (6 ml) was added thietan-3-ylamine (88 mg), Hünigs base (0.248 ml) and 2-bromo-1-ethyl-pyridinium tetrafluoroborate (169 mg). The reaction mixture was stirred at ambient temperature for 2 hours. Water was added and the mixture was extracted twice with dichloromethane. The combined organic phases were washed with brine, dried over sodium sulfate and concentrated. The residue was purified by chromatography on silica gel (eluent: ethyl acetate/heptanes 1:3) to give 3-methyl-4-(thietan-3-ylcarbamoyl)-N-trimethylsilanylmethyl-thiobenzimidic acid methyl ester (16 mg). 1H-NMR (400 MHz, CDCl3): 7.40-7.20 (m, 3H), 6.20 (d, 1H); 5.30 (m, 1H), 3.55 (s, 2H), 3.35 (m, 2H), 3.25 (m, 2H), 2.35 (s, 3H), 1.95 (s, 3H), 0.00 (s, 9H) ppm. the mixture was extracted twice with dichloromethane The combined organic phases were washed with brine dried over sodium sulfate concentrated The residue was purified by chromatography on silica gel (eluent: ethyl acetate/heptanes 1:3)

反応条件: temp:30.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 2-methyl-4-[(5S)-5-(3,4,5-trichlorophenyl)-5-(trifluoromethyl)-4H-isoxazol-3-yl]benzoic acid (28.72 mmol, 13 g) in dichloromethane (100 mL) and N,N-dimethylformamide (0.2867 mmol, 0.0210 g) was added oxalyl chloride (4.836 g) dropwise at room temperature and under argon (the liberated hydrochloric acid gas was scrubbed with a sodium hydroxide 0.5N solution). The mixture was stirred at room temperature for 1 h and at 30° C. for 20 min until the gas evolution ceased. The reaction mixture was concentrated to dryness and redissolved in dichloromethane (100 mL), triethylamine (71.81 mmol, 7.340 g) was added at 0-5° C. under argon followed by dropwise addition of thietan-3-amine (28.72 mmol, 2.561 g). The mixture was allowed to warm to room temperature and stirred for 16 h. The mixture was extracted with aqueous hydrochloric acid (0.5N), water, brine, dried over MgSO4, filtered and evaporated affording the crude product. Purification over silica gel (eluent: CH2Cl2/EtOAc) yielded the title compound. LCMS (Method GR) RT 1.25 min, [M+H]+ 523/525; 1H-NMR (CDCl3, 400 MHz): 2.45 (s, 3H), 3.35 (m, 2H), 3.50 (m, 2H), 3.60 (d, 1H), 74.10 (d, 1H), 5.40 (q, 1H), 6.20 (d, NH), 7.40 (s, 1H), 7.51 (d, 1H), 7.40 (s, 1H), 7.50 (s, 2H), 7.65 (s, 2H). 19F-NMR (CDCl3, 376 MHz): −79.43. The reaction mixture was concentrated to dryness redissolved in dichloromethane (100 mL) to warm to room temperature stirred for 16 h The mixture was extracted with aqueous hydrochloric acid (0.5N), water, brine dried over MgSO4 filtered evaporated affording the crude product Purification over silica gel (eluent: CH2Cl2/EtOAc)

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: An autoclave was charged with 3-pyridinium-thietane p-toluenesulfonate (1 g) and ammonia in methanol (7M, 20 ml). The apparatus was closed and placed in a pre-heated oil bath at 180° C. for 30 min (pressure 15 bar). The reaction mixture was cooled to room temperature then in ice bath. The yellow solution was concentrated under reduced pressure to afford the title product alongside ammonium tosylate (800 mg, NMR ratio 1:2 thietanamine:ammonium tosylate). 1H-NMR (400 MHz, DMSO-d6): 3.18 (dt, 2H), 3.36 (br s, 2H), 3.41 (dt, 2H), 4.50 (quint., 1H). The apparatus was closed The yellow solution was concentrated under reduced pressure