反应详情

A suspension of 2-amino-5-bromo-N,N-diethylbenzamide (Compound 3D, 326 mg, 1.20 mmol), 3-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazol-1-yl]propan-1-ol (Compound 3E, 0.33 g, 1.32 mmol), [1,1′-bis(diphenylphosphino)ferrocene]dichloropalladium(II) complex with dichloromethane (1:1) (106.8 mg, 0.13 mmol) and potassium carbonate (0.50 g, 3.64 mmol) in 1,4-dioxane (4 mL, 50 mmol) to H2O (1 mL, 60 mmol) was evacuated and charged with argon (3×). The sample was irradiated in a microwave reactor for 30 min at 100° C. The crude product was concentrated in vacuo to a solid and purified using a Teledyne ISCO Combiflash® Rf system [0→5% MeOH in DCM] to yield the desired product (197 mg, 52%). 1H NMR (400 MHz, CD3OD) δ 7.86 (d, J=0.51 Hz, 1H), 7.71 (d, J=0.76 Hz, 1H), 7.36 (dd, J=2.02, 8.34 Hz, 1H), 7.22 (d, J=2.02 Hz, 1H), 6.81 (d, J=8.34 Hz, 1H), 4.24 (t, J=6.82 Hz, 2H), 3.33-3.60 (m, 6H), 2.05 (quin, J=6.57 Hz, 2H), 1.04-1.35 (m, 6H). MS (ESI): m/z 317.59 [M+H]+. UPLC: tR=0.74 min (UPLC-SQD: analytical—2 min).

1. customwas evacuated
2. additioncharged with argon (3×)
3. customThe sample was irradiated in a microwave reactor for 30 min at 100° C
4. concentrationThe crude product was concentrated in vacuo to a solid
5. custompurified