Acetonitrile → tert-Butyl 4-(6-(5-(cyanomethyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazolo[3,4-c]pyridin-3-yl)pyridin-2-yl)piperazine-1-carboxylate

HRID 1775049Notes

Reaction equation

HRID 1775049 reaction equation
C([Li])CCC.[C:6](#[N:8])[CH3:7].[C:9]([O:13][C:14]([N:16]1[CH2:21][CH2:20][N:19]([C:22]2[CH:27]=[CH:26][CH:25]=[C:24]([C:28]3[C:36]4[C:31](=[CH:32][N:33]=[C:34](Br)[CH:35]=4)[N:30]([CH:38]4[CH2:43][CH2:42][CH2:41][CH2:40][O:39]4)[N:29]=3)[N:23]=2)[CH2:18][CH2:17]1)=[O:15])([CH3:12])([CH3:11])[CH3:10].[NH4+].[Cl-]>CCCCCC.O1CCCC1>[C:6]([CH2:7][C:34]1[CH:35]=[C:36]2[C:28]([C:24]3[N:23]=[C:22]([N:19]4[CH2:20][CH2:21][N:16]([C:14]([O:13][C:9]([CH3:12])([CH3:10])[CH3:11])=[O:15])[CH2:17][CH2:18]4)[CH:27]=[CH:26][CH:25]=3)=[N:29][N:30]([CH:38]3[CH2:43][CH2:42][CH2:41][CH2:40][O:39]3)[C:31]2=[CH:32][N:33]=1)#[N:8]

Participants

7

Reactant 4

HCID 6342AcetonitrileHCID 25517Ammonium ChlorideHCID 866766914-{6-[5-bromo-1-(tetrahydro-pyran-2-yl)-1H-pyrazolo[3,4-c]pyridin-3-yl]-pyridin-2-yl}-piperazine-1-carboxylic acid tert-butyl esterHCID 178418339Butyllithium

Product 1

HCID 71261625tert-Butyl 4-(6-(5-(cyanomethyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazolo[3,4-c]pyridin-3-yl)pyridin-2-yl)piperazine-1-carboxylateYield 17.5%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8058HexaneSolvent

Procedure

A solution of 0.940 mL of 1.6 M of n-Butyllithium in hexane was added dropwise to a solution of 0.102 mL, (1.95 mmol) of acetonitrile in tetrahydrofuran at −78° C. The mixture was stirred for 30 min and a solution of 272 mg (0.500 mmol) of 4-{6-[5-bromo-1-(tetrahydro-pyran-2-yl)-1H-pyrazolo[3,4-c]pyridin-3-yl]-pyridin-2-yl}-piperazine-1-carboxylic acid tert-butyl ester was added. The brown mixture was stirred for 30 min at −50° C. and 2 ml of saturated aqueous NH4Cl was added. The mixture was allowed to warm to room temperature and extracted with ethyl acetate. The organic extracts were washed with water, brine, dried over MgSO4 and concentrated. The residue was purified via silica gel chromatography using a gradient of ethyl acetate in heptane to afford 44 mg (17%) of tert-Butyl 4-(6-(5-(cyanomethyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazolo[3,4-c]pyridin-3-yl)pyridin-2-yl)piperazine-1-carboxylate. ESI MS m/z 504.2 (M+1).

Workup

  1. stirringThe brown mixture was stirred for 30 min at −50° C.
  2. extractionextracted with ethyl acetate
  3. washThe organic extracts were washed with water, brine
  4. dry with materialdried over MgSO4
  5. concentrationconcentrated
  6. customThe residue was purified via silica gel chromatography

Sources & evidence

ORD record
ord-f89f4c16c6e542ea8e1e6a2093ea6be7
Source dataset
uspto-grants-2016_02
Patent number
US09260425B2

Reaction notes

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