Water → 1-{2-[4-(4-Chloro-3-methoxy-phenyl)-piperazin-1-yl]-2-oxo-ethyl}-1H-pyrazolo[3,4-b]pyridine-3-carbonitrile

HRID 503904Notes

Reaction equation

HRID 503904 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([N:8]2[CH2:13][CH2:12][N:11]([C:14](=[O:26])[CH2:15][N:16]3[C:20]4=[N:21][CH:22]=[CH:23][CH:24]=[C:19]4[C:18](I)=[N:17]3)[CH2:10][CH2:9]2)=[CH:4][C:3]=1[O:27][CH3:28].[CH3:29][N:30](C=O)C.O>CCOC(C)=O.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.[Fe+2].[C-]#N.[C-]#N.[Zn+2].C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([N:8]2[CH2:13][CH2:12][N:11]([C:14](=[O:26])[CH2:15][N:16]3[C:20]4=[N:21][CH:22]=[CH:23][CH:24]=[C:19]4[C:18]([C:29]#[N:30])=[N:17]3)[CH2:10][CH2:9]2)=[CH:4][C:3]=1[O:27][CH3:28]

Participants

8

Reactant 3

HCID 962WaterHCID 6228DimethylformamideHCID 160060311-[4-(4-Chloro-3-methoxy-phenyl)-piperazin-1-yl]-2-(3-iodo-pyrazolo[3,4-b]pyridin-1-yl)-ethanone

Product 1

HCID 160055291-{2-[4-(4-Chloro-3-methoxy-phenyl)-piperazin-1-yl]-2-oxo-ethyl}-1H-pyrazolo[3,4-b]pyridine-3-carbonitrileYield 93%

Reagents, catalysts & solvents 4

HCID 11186Zinc cyanide (Zn(CN)2)CatalystHCID 635956Ferrocene-1,1'-bis-(diphenylphosphine)CatalystHCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
90 °C

Procedure

To a 2000 mL flask was charged with 1-[4-(4-Chloro-3-methoxy-phenyl)-piperazin-1-yl]-2-(3-iodo-pyrazolo[3,4-b]pyridin-1-yl)-ethanone (40 g, 78.1 Mmol), dppf (3.86 g, 6.96 mmol), Zn(CN)2 (9.6 g, 81.6 Mmol), DMF (360 mL) and H2O (20 mL). The resulting suspension was degassed using N2 for 5 min, followed by addition of Pd2(dba)3 (4.24 g, 4.64 mmol). The reaction mixture was heated under N2 at 90° C. for 2 h (monitor by TLC and LC-MS). After cooling to room temperature, diluted with EtOAc (1500 mL), filtered to remove the precipitate and washed with H2O (1000×2 mL), saturated EDTA.4Na (800 mL×2), brine and dried over Na2SO4. After evaporation of the solvent, ether (150 mL) was added and stirred for 2 h. The resulting solid was filtered to give the desired product 30 g (93%) as light yellow powder. Recrystallization from refluxing CH3CN (160 mL) afforded 26 g (80%) light yellow crystals: mp 183-185° C.; Rt=2.38 min; MS (ES) M+H expect 411.1, found 411.1.

Workup

  1. customThe resulting suspension was degassed
  2. customfor 5 min
  3. temperatureAfter cooling to room temperature
  4. filtrationfiltered
  5. customto remove the precipitate
  6. washwashed with H2O (1000×2 mL), saturated EDTA
  7. dry with material4Na (800 mL×2), brine and dried over Na2SO4
  8. customAfter evaporation of the solvent, ether (150 mL)
  9. additionwas added
  10. filtrationThe resulting solid was filtered

Sources & evidence

ORD record
ord-7ae77380ef0741a3bb6583bd1b305b1d
Source dataset
uspto-grants-2010_08
Patent number
US07777035B2

Reaction notes

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