反应详情

In a microwave vial was placed ((R)-1-{4-[(2-bromo-5-tert-butoxycarbonylamino-thiazole-4-carbonyl)-amino]-2-methyl-2H-pyrazol-3-yl}-perhydro-azepin-4-yl)-carbamic acid benzyl ester (78.2 mg, 0.12 mmol), 2-(2,4-difluorophenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (101.3 mg, 0.42 mmol, 3.5 eq.), cesium carbonate (196.4 mg, 0.60 mmol, 5.0 eq), [1,1′-bis(diphenylphosphino)ferrocene]-dichloropalladium(II), complexed with dichloromethane (1:1) (29.5 mg, 0.036 mmol, 0.30 eq), and anhydrous N,N-dimethylformamide (3.5 mL). The reaction mixture was degassed with N2 for 10 minutes and then subjected to microwave irradiation at 100° C. for 30 minutes. The reaction mixture was diluted with ethyl acetate (50 mL) and then filtered through a pad of Celite. The filtrate was washed with 50% brine/water, water and brine, dried over Na2SO4, filtered, and concentrated under reduced pressure. The crude was purified via flash column chromatography eluted with 40 to 100% ethyl acetate/heptane to give 46.4 mg (56.5%) of desired product as a white solid. 1H NMR (400 MHz, CDCl3) δ 10.35 (s, 1H), 8.63 (s, 1H), 8.14-8.04 (m, 1H), 7.82 (s, 1H), 7.31 (s, 5H), 7.03-6.87 (m, 2H), 5.11-5.00 (s, 2H), 4.84-4.74 (m, 1H), 3.95-3.85 (m, 1H), 3.74 (s, 3H), 3.35-3.24 (m, 2H), 3.23-3.11 (m, 2H), 2.18-2.03 (m, 2H), 1.97-1.65 (m, 4H), 1.53 (s, 9H); MS (ESI) m/z: 682.6 [M+H]+.

1. customThe reaction mixture was degassed with N2 for 10 minutes
2. customirradiation at 100° C. for 30 minutes
3. additionThe reaction mixture was diluted with ethyl acetate (50 mL)
4. filtrationfiltered through a pad of Celite
5. washThe filtrate was washed with 50% brine/water, water and brine
6. dry with materialdried over Na2SO4
7. filtrationfiltered
8. concentrationconcentrated under reduced pressure
9. customThe crude was purified via flash column chromatography
10. washeluted with 40 to 100% ethyl acetate/heptane