Acryloyl chloride → N-{5-[(5-Cyano-4-pyrazolo[1,5-a]pyridin-3-ylpyrimidin-2-yl)amino]-2-[2-dimethylaminoethyl-methylamino]-4-methoxyphenyl}prop-2-enamide

Participants

Reaction Conditions

Reaction Steps

A solution of acryloyl chloride (0.087 mL, 1M, THF, 0.09 mmol) was added dropwise to a mixture of 2-{[5-amino-4-(2-dimethylaminoethyl-methylamino)-2-methoxyphenyl]-amino}-4-pyrazolo[1,5-a]pyridin-3-ylpyrimidine-5-carbonitrile (Intermediate 121, 0.036 g, 0.08 mmol) and DIPEA (0.017 mL, 0.09 mmol) in THF (5 mL) which was cooled to 0° C. The mixture was stirred at 0° C. for 3 h, then concentrated in vacuo. Purification by FCC, eluting with 0-20% CH3OH in CH2Cl2 have crude product which appeared to contain the hydrochloride salt of DIPEA. The material was dissolved in CH2Cl2 (10 mL) and stirred with sat. NaHCO3 solution (10 mL). The phases were separated and the organic solution was concentrated in vacuo to give the title compound (24 mg, 60%) as a yellow gum; 1H NMR: (CDCl3) 2.22 (6H, s), 2.26 (2H, dd), 2.67 (3H, d), 2.77-2.86 (2H, m), 3.81 (3H, s), 5.61 (1H, dd), 6.16-6.35 (2H, m), 6.76 (1H, s), 6.88 (1H, d), 7.23 (1H, s), 7.65 (1H, s), 8.50 (2H, dd), 8.59 (1H, s), 9.02 (1H, s), 9.28 (1H, s), 10.08 (1H, s); m/z: ES+ MH+ 512.29.

Provenance & Evidence