反应详情

To a solution of 3-(5-methylpyridin-2-yl)-5-(5-oxa-6-azaspiro[3.4]oct-6-en-7-yl)benzoic acid (0.20 g, 0.56 mmol) in N,N-dimethylformamide (2.5 mL) were added (1R)-1-(3,5-difluoropyridin-2-yl)ethanamine hydrochloride salt (0.13 g, 0.67 mmol), EDC (0.16 g, 0.70 mmol), HOAT (0.5 M in DMF; 0.56 mL, 0.28 mmol) and diisopropylethylamine (0.09 mL, 0.56 mmol). The reaction mixture was at ambient temperature and solid was filtered off. Purification by reverse phase HPLC(C-18, 95% water/acetonitrile 5% water/acetonitrile with 0.1% trifluoroacetic acid). Clean fractions were combined and saturated aqueous NaHCO3 was added and the mixture was extracted with ethyl acetate (3×). The combined organic extracts were washed with water (3×), brine, dried over sodium sulfate, filtered and concentrated gave the title compound (150 mg). HRMS 463.1948 (M+1). 1H NMR (400 MHz, CDCl3): δ 8.51 (s, 1H); 8.44 (t, J=1.7 Hz, 1H); 8.38 (t, J=1.6 Hz, 1H); 8.29 (d, J=2.4 Hz, 1H); 8.14 (t, J=1.6 Hz, 1H); 7.71 (d, J=8.1 Hz, 1H); 7.63 (d, J=7.6 Hz, 1H); 7.58 (dd, J=8.1, 2.2 Hz, 1H); 7.24-7.16 (m, 1H); 5.71-5.61 (m, 1H); 3.51 (s, 2H); 2.62-2.50 (m, 2H); 2.37 (s, 3H); 2.26-2.18 (m, 2H); 1.90-1.79 (m, 1H); 1.68-161 (m, 1H); 1.54 (d, J=6.7 Hz, 3H).

1. customwas at ambient temperature
2. filtrationsolid was filtered off
3. customPurification by reverse phase HPLC(C-18, 95% water/acetonitrile 5% water/acetonitrile with 0.1% trifluoroacetic acid)
4. additionsaturated aqueous NaHCO3 was added
5. extractionthe mixture was extracted with ethyl acetate (3×)
6. washThe combined organic extracts were washed with water (3×), brine
7. dry with materialdried over sodium sulfate
8. filtrationfiltered
9. concentrationconcentrated