Acryloyl chloride → N-{5-[(5-Chloro-4-pyrazolo[1,5-a]pyridin-3-ylpyrimidin-2-yl)amino]-4-methoxy-2-[1-methyl-3,6-dihydro-2H-pyridin-4-yl]phenyl}prop-2-enamide

Participants

Reaction Steps

A solution of acryloyl chloride (0.026 mL, 0.32 mmol) in CH2Cl2 (1 mL) was added dropwise to a mixture of N′-(5-chloro-4-pyrazolo[1,5-a]pyridin-3-ylpyrimidin-2-yl)-4-methoxy-6-(1-methyl-3,6-dihydro-2H-pyridin-4-yl)benzene-1,3-diamine (Intermediate 55, 150 mg, 0.32 mmol) and DIPEA (0.062 mL, 0.36 mmol) in CH2Cl2 (5 mL), which was cooled in an ice/water bath. The mixture was stirred for 3 h and then washed with brine, dried (Na2SO4) and concentrated in vacuo. Purification by FCC, eluting with 2.5% 7N methanolic ammonia in CH2Cl2 gave the title compound (120 mg, 72%) as a yellow foam; 1H NMR: 2.28 (3H, s), 2.38 (2H, s), 2.54 (2H, t), 2.98 (2H, d), 3.81 (3H, s), 5.62-5.73 (2H, m), 6.14 (1H, dd), 6.43 (1H, dd), 6.88 (1H, s), 7.12 (1H, dt), 7.39-7.47 (1H, m), 7.83 (1H, s), 8.41-8.50 (2H, m), 8.63 (1H, s), 8.85 (1H, d), 8.95 (1H, s), 9.36 (1H, s); m/z: ES+ MH+ 516.25.

Provenance & Evidence