反应详情

A mixture of benzotriazol-1-yloxytris(dimethylamino)phosphonium hexafluorophosphate (60.0 mg, 0.14 mmol), 5-{3-(cyanomethyl)-3-[4-(7-{[2-(trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]azetidin-1-yl}pyridine-2-carboxylic acid (48.4 mg, 0.0913 mmol), 3,3-difluorocyclobutanamine hydrochloride (20. mg, 0.14 mmol, Molbridge: Cat. #MB00001399) and N,N-diisopropylethylamine (64 μL, 0.36 mmol) in methylene chloride (2 mL) was stirred at room temperature overnight. The reaction mixture was worked up with aqueous NaHCO3, and extracted with dichloromethylene (2×2 mL). The combined organic layers were washed with water (1 mL), concentrated and dried under reduced pressure. The residue was dissolved in dichloromethylene (1 mL) and trifluoroacetic acid (0.5 mL). The mixture was stirred at room temperature for 1.5 hours, and concentrated under reduced pressure. The residue was dissolved in methanol (2.5 mL). Ethylenediamine (0.21 mL, 3.2 mmol) were added. The reaction mixture was stirred at room temperature for 2 hours, and purified by RP-HPLC (pH=10) to afford the desired product. LCMS (M+H)+: m/z=490.1. 1H NMR (300 MHz, DMSO-d6): δ 12.50 (br, 1H), 9.01 (s, 1H), 8.93 (d, J=7.8 Hz, 1H), 8.76 (s, 1H), 8.50 (s, 1H), 7.89 (d, J=2.7 Hz, 1H), 7.81 (d, J=8.6 Hz, 1H), 7.70 (dd, J=3.4, 2.5 Hz, 1H), 7.15 (dd, J=3.5, 1.5 Hz, 1H), 7.04 (dd, J=8.6, 2.8 Hz, 1H), 4.63 (d, J=9.0 Hz, 2H), 4.36 (d, J=8.9 Hz, 2H), 4.23 (m, 1H), 3.73 (s, 2H), 2.80 (m, 4H).

1. extractionextracted with dichloromethylene (2×2 mL)
2. washThe combined organic layers were washed with water (1 mL)
3. concentrationconcentrated
4. customdried under reduced pressure
5. dissolutionThe residue was dissolved in dichloromethylene (1 mL)
6. stirringThe mixture was stirred at room temperature for 1.5 hours
7. concentrationconcentrated under reduced pressure
8. dissolutionThe residue was dissolved in methanol (2.5 mL)
9. stirringThe reaction mixture was stirred at room temperature for 2 hours
10. custompurified by RP-HPLC (pH=10)