Diisopropylethylamine → 2-chloro-N-(5-cyclopropyl-1H-pyrazol-3-yl)-5-nitropyridin-4-amine

HRID 1092240Notes

Reaction equation

[Cl:1][C:2]1[CH:7]=[C:6](Cl)[C:5]([N+:9]([O-:11])=[O:10])=[CH:4][N:3]=1.CCN(C(C)C)C(C)C.[CH:21]1([C:24]2[NH:28][N:27]=[C:26]([NH2:29])[CH:25]=2)[CH2:23][CH2:22]1>C1COCC1>[Cl:1][C:2]1[CH:7]=[C:6]([NH:29][C:26]2[CH:25]=[C:24]([CH:21]3[CH2:23][CH2:22]3)[NH:28][N:27]=2)[C:5]([N+:9]([O-:11])=[O:10])=[CH:4][N:3]=1

Participants

Conditions

Temperature: 25 °C

Procedure

To a solution of 2,4-dichloro-5-nitropyridine (Method 91, 0.42 g, 2.18 mmol) and DIEA (0.46 ml, 2.61 mmol) in THF (10 ml) was added a 5-cyclopropyl-1H-pyrazol-3-amine (0.31 g, 2.50 mmol) solution in THF (5 ml) drop wise at 0° C. After addition, the reaction mixture was stirred at 25° C. for 17 hours. The solvent was removed under reduced pressure and the resulted residue was purified by column chromatography (hexane:EtOAc=3:1) to give the title compound as a yellow solid (0.54 g, 89%). 1H NMR (400 MHz) 12.55 (s, 1H), 9.95 (s, 1H), 8.97 (s, 1H), 8.09 (s, 1H), 6.02 (d, J=2.0 Hz, 1H), 1.93 (m, 1H), 0.97 (m, 2H), 0.71 (m, 2H). MS: Calcd.: 279; Found: [M+H]+ 280.

Workup

additionAfter addition
customThe solvent was removed under reduced pressure
customthe resulted residue was purified by column chromatography (hexane:EtOAc=3:1)

Sources & evidence

ORD record: ord-716ccbc3c591452a88a603c61dd47870
Source dataset: uspto-grants-2012_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08129403B2

Reaction notes

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