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Hydrazine → N-cyclopentyl-4-[2-(4-fluorophenyl)-7-hydrazinopyrazolo[1,5-a]pyridin-3-yl]-6-methyl-2-pyrimidinamine

HRID 1373795
Notes
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Reaction equation

HRID 1373795 reaction equation
Cl[C:2]1[N:7]2[N:8]=[C:9]([C:24]3[CH:29]=[CH:28][C:27]([F:30])=[CH:26][CH:25]=3)[C:10]([C:11]3[CH:16]=[C:15]([CH3:17])[N:14]=[C:13]([NH:18][CH:19]4[CH2:23][CH2:22][CH2:21][CH2:20]4)[N:12]=3)=[C:6]2[CH:5]=[CH:4][CH:3]=1.[NH2:31][NH2:32]>C(O)C.C(OCC)(=O)C>[CH:19]1([NH:18][C:13]2[N:12]=[C:11]([C:10]3[C:9]([C:24]4[CH:29]=[CH:28][C:27]([F:30])=[CH:26][CH:25]=4)=[N:8][N:7]4[C:2]([NH:31][NH2:32])=[CH:3][CH:4]=[CH:5][C:6]=34)[CH:16]=[C:15]([CH3:17])[N:14]=2)[CH2:23][CH2:22][CH2:21][CH2:20]1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 2

HCID 9321HydrazineHCID 102957644-[7-chloro-2-(4-fluorophenyl)pyrazolo[1,5-a]pyridin-3-yl]-N-cyclopentyl-6-methyl-2-pyrimidinamine

Product 1

HCID 10202082N-cyclopentyl-4-[2-(4-fluorophenyl)-7-hydrazinopyrazolo[1,5-a]pyridin-3-yl]-6-methyl-2-pyrimidinamineYield 46%

Reagents, catalysts & solvents 2

HCID 702EthanolSolvent
HCID 8857
Ethyl Acetate
Solvent

Conditions

Temperature
90 °C

Procedure

To a solution of 4-[7-chloro-2-(4-fluorophenyl)pyrazolo[1,5-α]pyridin-3-yl]-N-cyclopentyl-6-methyl-2-pyrimidinamine (100 mg, 0.237 mmol) in ethanol (1 mL) was added hydrazine (500 uL, 15.9 mmol). The reaction mixture was heated in a sealed tube at 90° C. for 72 hours. The mixture was cooled and diluted with ethyl acetate and washed with saturated aqueous sodium bicarbonate, water and brine. The combined organics were dried over magnesium sulfate. Filtration and concentration followed by flash chromatography (38:2 dichloromethane-methanol) provided N-cyclopentyl-4-[2-(4-fluorophenyl)-7-hydrazinopyrazolo[1,5-α]pyridin-3-yl]-6-methyl-2-pyrimidinamine (45 mg, 46%) as a yellow solid. Rf 0.43 (38:2 CH2Cl2-MeOH); 1H NMR (CDCl3) δ 7.78 (1H), 7.62 (2H), 7.35 (1H), 7.20 (1H), 7.12 (2H), 6.45 (1H), 6.24 (1H), 5.03 (1H), 4.35 (1H), 3.85 (2H), 2.18 (3H), 2.02 (2H), 1.62 (6H); MS m/z 418 (M+1).

Workup

  1. temperatureThe mixture was cooled
  2. washwashed with saturated aqueous sodium bicarbonate, water and brine
  3. dry with materialThe combined organics were dried over magnesium sulfate
  4. filtrationFiltration and concentration

Sources & evidence

ORD record
ord-3973ba1c19b24b729ead74990c190b1c
Source dataset
uspto-grants-2007_01
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07163940B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes