反应详情

The boronic acid (231 mg, 1.5 mmol), prepared in example 210A, 2-(2,2,2-trifluoroethyl)-4-chloro-5-[4-(methylsulfonyl)phenyl]-3(2H)-pyridazinone (500 mg, 1.36 mmol), tetrakis-(triphenylphosphine)-palladium(0) (47 mg, 0.041 mmol), and CsF (413 mg, 2.72 mmol) were stirred at reflux in DME (20 mL) under N2 for 5 hours. TLC (1:1 hexanes/ethyl acetate) indicated that all the starting material was consumed. Volatiles were removed in vacuo. The residue was partitioned between water and ethyl acetate. The organic layer was washed with brine, dried over MgSO4, and filtered. The filtrate was concentrated in vacuo. An off white powder was obtained (yield: 275 mg, 46%). mp 88-91° C.; 1H NMR (300 MHz, CDCl3, a mixture of rotamers) δ 2.2, 2.25 (2d, J=1.5 Hz, 3H) 3.05, 3.09 (2 s, 3H) 4.78-4.92 (m, 2H) 6.61-6.8 (m, 1H) 6.82-6.98 (m, 1H) 7.35 (d, J=9 Hz, 1H) 7.78 (d, J=9 Hz, 1H) 7.86-8.09 (m, 4H). MS (DCI/NH3), m/z 441 (M+H)+. Anal. calc. for C20H16F4N2O3S.0.5 H2O: C, 53.45; H, 3.81; N, 6.23. Found C, 53.17; H, 3.65; N, 5.88.

1. customwas consumed
2. customVolatiles were removed in vacuo
3. customThe residue was partitioned between water and ethyl acetate
4. washThe organic layer was washed with brine
5. dry with materialdried over MgSO4
6. filtrationfiltered
7. concentrationThe filtrate was concentrated in vacuo
8. customAn off white powder was obtained (yield: 275 mg, 46%)