Hydrazine hydrate (1:1) → HCID 22258870, compound

HRID 1611176Notes

Reaction equation

HRID 1611176 reaction equation
[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][C:10]=1[C:15]1[N:20]=[C:19](Br)[C:18]([CH:22]=O)=[C:17]([CH:24]2[CH2:29][CH2:28][CH2:27][N:26]([C:30]([O:32][C:33]([CH3:36])([CH3:35])[CH3:34])=[O:31])[CH2:25]2)[CH:16]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.O.[NH2:38][NH2:39]>O1CCOCC1>[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][CH:12]=[CH:11][C:10]=1[C:15]1[N:20]=[C:19]2[NH:38][N:39]=[CH:22][C:18]2=[C:17]([CH:24]2[CH2:29][CH2:28][CH2:27][N:26]([C:30]([O:32][C:33]([CH3:34])([CH3:35])[CH3:36])=[O:31])[CH2:25]2)[CH:16]=1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

4

Reactant 2

HCID 24654Hydrazine hydrate (1:1)HCID 22258965HCID 22258965, compound

Product 1

HCID 22258870HCID 22258870, compoundYield 23%

Reagents, catalysts & solvents 1

HCID 312751,4-DioxaneSolvent

Conditions

Temperature
90 °C

Procedure

To a stirred solution of tert-butyl 3-{6-[2-(benzyloxy)phenyl]-2-bromo-3-formyl-4-pyridinyl}-1-piperidinecarboxylate (0.150 g, 0.272 mmol) in 1,4-dioxane (1 mL) was added hydrazine monohydrate (0.5 mL). The reaction mixture was stirred at 90° C. for 15 hrs. After cooled to room temperature, the reaction was quenched with water and extracted with ethyl acetate. The organic phase was dried over sodium sulfate, filtered and concentrated under reduced pressure. The residue was recrystallized from diethyl ether to give tert-butyl 3-{6-[2-(benzyloxy)phenyl]-1H-pyrazolo[3,4-b]pyridin-4-yl}-1-piperidinecarboxylate as a white solid (0.030 g, 23%). Then tert-butyl 3-{6-[2-(benzyloxy)phenyl]-1H-pyrazolo[3,4-b]pyridin-4-yl}-1-piperidinecarboxylate was treated in a similar manner as that of the step (2) of Example 1-1 and then the step (3) of Example 1-1 to obtain 2-(4-Piperidin-3-yl-1H-pyrazolo[3,4-b]pyridin-6-yl)-phenol hydrochloride.

Workup

  1. temperatureAfter cooled to room temperature
  2. customthe reaction was quenched with water
  3. extractionextracted with ethyl acetate
  4. dry with materialThe organic phase was dried over sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was recrystallized from diethyl ether

Sources & evidence

ORD record
ord-d9c08e0d1b2640bbb17a1b267bf159a5
Source dataset
uspto-grants-2006_01
Patent number
US06984649B1

Reaction notes

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