Diisopropylethylamine → N-[4-(3-dimethylaminoazetidin-1-yl)-2-methoxy-5-nitrophenyl]-4-pyrazolo[1,5-a]pyridin-3-ylpyrimidin-2-amine

Participants

Reaction Conditions

Reaction Steps

N,N-Dimethylazetidin-3-amine dihydrochloride (Intermediate 26, 227 mg, 1.31 mmol) was added to a suspension of N-(4-fluoro-2-methoxy-5-nitrophenyl)-4-pyrazolo[1,5-a]-pyridin-3-ylpyrimidin-2-amine (Intermediate 155, 415 mg, 1.09 mmol) and DIPEA (0.755 mL, 4.36 mmol) in DMA (3.2 mL) and the mixture was heated at 85° C. for 1 h. The mixture was part-purified by ion exchange chromatography, using an SCX column and eluting with 7M methanolic ammonia. Clean fractions were combined and concentrated in vacuo. Further purification by FCC, eluting with 0-7% CH3OH in CH2Cl2 gave the title compound (360 mg, 72%) as an orange solid; 1H NMR: 2.15 (6H, s), 3.12-3.19 (1H, m), 3.74-3.78 (2H, m), 3.95 (3H, s), 4.04-4.09 (2H, m), 6.29 (1H, s), 7.08 (1H, td), 7.28 (1H, d), 7.36-7.41 (1H, m), 8.26 (1H, s), 8.35 (1H, d), 8.45-8.49 (2H, m), 8.78 (1H, s), 8.80 (1H, d); m/z: ES+ MH+ 461.33.

Provenance & Evidence