反应详情

A mixture of 2-(3,5-diisopropylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (288 mg, 1.00 mmol, 1.00 equiv), tert-butyl N-[2-([[3-iodo-1-(oxan-2-yl)-1H-pyrazol-4-yl]methyl](methyl)amino)ethyl]-N-methylcarbamate (479 mg, 1.00 mmol, 1.00 equiv), K3PO4 (636 mg, 3.00 mmol, 3.00 equiv) and [1,1′-bis(di-tert-butylphosphino)ferrocene]dichloropalladium (65 mg, 0.10 mmol, 0.10 equiv) in ethylene glycol dimethyl ether (5 mL) was stirred under nitrogen in a 10-mL sealed tube for 12 h at 85° C. The resulting mixture was cooled to room temperature and concentrated under vacuum. The residue was purified on a silica gel column eluted with dichloromethane/methanol (39:1 with 0.1% triethylamine) to obtain 100 mg (20%) of tert-butyl N-[2-[([3-[3,5-bis(propan-2-yl)phenyl]-1-(oxan-2-yl)-1H-pyrazol-4-yl]methyl)(methyl)amino]ethyl]-N-methylcarbamate as a black solid. 1H NMR (300 MHz, DMSO-d6): δ 7.83 (s, 1H), 7.49 (s, 2H), 7.07 (s, 1H), 5.45-5.35 (m, 1H), 4.01-3.88 (m, 1H), 3.71-3.60 (m, 1H), 3.40 (s, 2H), 3.24 (s, 2H), 3.00-2.80 (m, 2H), 2.68 (s, 3H), 2.49-2.40 (m, 2H), 2.23 (s, 3H), 2.15-1.85 (m, 3H), 1.80-1.60 (m, 1H), 1.31 (s, 9H), 1.23 (d, J=6.9 Hz, 12H) ppm. LCMS (method D, ESI): RT=1.41 min, m/z=513.5 [M+H]+.

1. customsealed tube for 12 h at 85° C
2. concentrationconcentrated under vacuum
3. customThe residue was purified on a silica gel column
4. washeluted with dichloromethane/methanol (39:1 with 0.1% triethylamine)