Acetonitrile → N-(2-{(3R)-3-Dimethylaminopyrrolidin-1-yl}-4-methoxy-5-{[4-(4,5,6,7-tetrahydropyrazolo[1,5-a]pyridin-3-yl)pyrimidin-2-yl]amino}phenyl)prop-2-enamide

Participants

Reaction Steps

A solution of acryloyl chloride (32 mg, 0.36 mmol) in CH2Cl2 (1 mL) was added dropwise to a stirred solution of 4-[(3R)-3-dimethylaminopyrrolidin-1-yl]-6-methoxy-N-[4-(4,5,6,7-tetrahydropyrazolo[1,5-a]pyridin-3-yl)pyrimidin-2-yl]benzene-1,3-diamine (Intermediate 134, 152 mg, 0.34 mmol) in CH2Cl2 (15 mL), which was cooled in an ice/water bath. The solution was stirred for 10 minutes while cooled by the ice bath, and was then allowed to warm to r.t. then stirred for 1 h. The mixture was then diluted with CH2Cl2 and washed with sat. NaHCO3 and then brine. The organic solution was then dried (MgSO4) and concentrated in vacuo. Purification by FCC, eluting with 0-5% 7N methanolic ammonia in CH2Cl2 gave crude product (100 mg) as a beige solid after trituration with diethyl ether. CH3CN (˜3 mL) was then added to the crude product and the resulting slurry was stirred at 50° C. for 4 h. After cooling to r.t. the suspended solid was collected by filtration, washed with CH3CN and dried at 45° C. overnight to give the title compound (72 mg, 42%) as a yellow solid; 1H NMR: 1.68-1.81 (3H, m), 1.89-1.98 (2H, m), 2.03-2.11 (1H, m), 2.17 (6H, s), 2.66-2.74 (1H, m), 3.00-3.05 (2H, m), 3.13-3.21 (3H, m), 3.31-3.38 (1H, m), 3.86 (3H, s), 4.09 (2H, t), 5.70 (1H, dd), 6.21 (1H, dd), 6.48-6.56 (2H, m), 6.96 (1H, d), 7.72 (1H, s), 8.03 (2H, d), 8.27 (1H, d), 9.30 (1H, s); m/z: ES+ MH+ 503.67.

Provenance & Evidence