Ethyl isocyanate → 7-(2-(2,5-difluorophenyl)-5-methylpyridin-4-ylamino)-N-ethyl-1H-pyrazolo[4,3-b]pyridine-1-carboxamide

HRID 1522641Notes

Reaction equation

[F:1][C:2]1[CH:7]=[CH:6][C:5]([F:8])=[CH:4][C:3]=1[C:9]1[CH:14]=[C:13]([NH:15][C:16]2[CH:21]=[CH:20][N:19]=[C:18]3[CH:22]=[N:23][NH:24][C:17]=23)[C:12]([CH3:25])=[CH:11][N:10]=1.[N:26]([CH2:29][CH3:30])=[C:27]=[O:28]>C(#N)C.N1C=CC=CC=1>[F:1][C:2]1[CH:7]=[CH:6][C:5]([F:8])=[CH:4][C:3]=1[C:9]1[CH:14]=[C:13]([NH:15][C:16]2[CH:21]=[CH:20][N:19]=[C:18]3[CH:22]=[N:23][N:24]([C:27]([NH:26][CH2:29][CH3:30])=[O:28])[C:17]=23)[C:12]([CH3:25])=[CH:11][N:10]=1

Participants

Conditions

Temperature: 75 °C

Procedure

N-(2-(2,5-Difluorophenyl)-5-methylpyridin-4-yl)-1H-pyrazolo[4,3-b]pyridin-7-amine (106 mg, 0.314 mmol) was suspended in acetonitrile (3.1 mL). Isocyanatoethane (30.8 μl, 0.393 mmol) and 1 drop of pyridine were added and the mixture was heated at 75° C. for 2 hours. The mixture was cooled to give a solid which was collected by filtration to give the title compound. 1H NMR (400 MHz, DMSO-d6) δ ppm 1.20 (3H, t, J=7.07 Hz) 2.38 (3H, s) 3.34-3.45 (2H, m) 7.25-7.42 (3H, m) 7.76 (1H, ddd, J=9.47, 6.06, 3.16 Hz) 7.93 (1H, s) 8.41 (1H, d, J=5.30 Hz) 8.54 (1H, s) 8.60 (1H, s) 9.09 (1H, t, J=5.81 Hz) 11.05 (1H, s). MS [M+H] found 409.4.

Workup

temperatureThe mixture was cooled
customto give a solid which
filtrationwas collected by filtration

Sources & evidence

ORD record: ord-cd5307cc0ebb40c1809e143a41f374e0
Source dataset: uspto-grants-2015_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09073918B2

Reaction notes

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