反应详情

To a crude solution of (S)-4-nitrophenyl 1-(5-chloropyridin-2-yl)-1-(3-fluoro-5-(trifluoromethyl)phenyl)-2-phenylethylcarbamate in DCE (1 mL) (67 mg, 0.13 mmol) was added 3,3-difluoropyrrolidine hydrobromide (24 mg, 0. 12 mmol). The reaction mixture was stirred at room temperature for 2 h and the solution turned yellow. The solution was concentrated, dissolved in MeOH (1.5 mL), filtered and purified by reverse phase prep. HPLC YMC ODSA 30×100 mm, 20-100% MeOH/H2O (0.1% TFA) gradient over 10 mins at 20 mL/min flow rate. (S)-N-(1-(5-chloropyridin-2-yl)-1-(3-fluoro-5-(trifluoromethyl)phenyl)-2-phenylethyl)-3,3-difluoropyrrolidine-1-carboxamide (0.011 g, 17% yield) eluted at a retention time of 11.2 mins and was isolated as colorless oil. LCMS: 2.15 min [M+1] 528.2 (2 min gradient, MeOH/H2O 0.1% TFA) 1H NMR (CDCl3, 400 MHz): 8.20 (d, J=2.0 Hz, 1H), 7.60 (dd, J=2 Hz, J=8 Hz, 1H), 7.46 (s, 1H), 7.30 (d, J=8 Hz, 1H), 7.15 (m, 2H), 7.05 (m, 1H), 7.03 (m, 3H), 6.44, (d, J=8 Hz, 1H), 4.37, (d, J=12 Hz, 1H), 3.74, (q, J=12 Hz, 1H), 3.54, (m, 1H), 3.44, (m, 2H), 3.32, (q, J=8 Hz, 1H), 2.32, (m, 2H).

1. concentrationThe solution was concentrated
2. dissolutiondissolved in MeOH (1.5 mL)
3. filtrationfiltered
4. custompurified by reverse phase prep
5. waitHPLC YMC ODSA 30×100 mm, 20-100% MeOH/H2O (0.1% TFA) gradient over 10 mins at 20 mL/min flow rate