Sodium Hydroxide → 6-bromo-N-((4,6-dimethyl-2-oxo-1,2-dihydropyridin-3-yl)methyl)-1H-pyrazolo[3,4-b]pyridine-4-carboxamide

HRID 1854059Notes

Reaction equation

HRID 1854059 reaction equation
[OH-].[Na+].[Br:3][C:4]1[CH:5]=[C:6]([C:13]([O:15]CC)=O)[C:7]2[CH:12]=[N:11][NH:10][C:8]=2[N:9]=1.[NH2:18][CH2:19][C:20]1[C:21](=[O:28])[NH:22][C:23]([CH3:27])=[CH:24][C:25]=1[CH3:26].C1CN([P+](ON2N=NC3C=CC=CC2=3)(N2CCCC2)N2CCCC2)CC1.F[P-](F)(F)(F)(F)F>CCO.CS(C)=O>[Br:3][C:4]1[CH:5]=[C:6]([C:13]([NH:18][CH2:19][C:20]2[C:21](=[O:28])[NH:22][C:23]([CH3:27])=[CH:24][C:25]=2[CH3:26])=[O:15])[C:7]2[CH:12]=[N:11][NH:10][C:8]=2[N:9]=1

Participants

7

Reactant 4

HCID 14798Sodium HydroxideHCID 2724699PyBOPHCID 70638443-(Aminomethyl)-4,6-dimethyl-1,2-dihydropyridin-2-oneHCID 59766670ethyl 6-bromo-1H-pyrazolo[3,4-b]pyridine-4-carboxylate

Product 1

HCID 867034116-bromo-N-((4,6-dimethyl-2-oxo-1,2-dihydropyridin-3-yl)methyl)-1H-pyrazolo[3,4-b]pyridine-4-carboxamideYield 58.47%

Reagents, catalysts & solvents 2

HCID 679Dimethyl SulfoxideSolventHCID 702EthanolSolvent2×

Conditions

Temperature
60 °C

Procedure

Aqueous NaOH (1.1 g, 27.88 mmol) was added to a solution of ethyl 6-bromo-1H-pyrazolo[3,4-b]pyridine-4-carboxylate (5 g, 18.6 mmol) in EtOH (50 mL) and stirred at 60° C. for 1 h. After completion of the reaction, ethanol was removed under reduced pressure and it was acidified using 10% citric acid solution. Solid obtained was filtered and dried under reduced pressure. The crude acid (4.4 g, 18.3 mmol) was then dissolved in DMSO (20 mL) and 3-(aminomethyl)-4,6-dimethylpyridin-2(1H)-one (5.55 g, 36.51 mmol) was added to it. The reaction mixture was stirred at room temperature for 15 min before PYBOP (14.24 g, 27.38 mmol) was added to it and stirring was continued overnight. After completion of the reaction, reaction mass was poured into ice to obtain solid, which was filtered and washed with acetonitrile followed by ether to provide the desired intermediate (4 g, 58.47%).

Workup

  1. customwas removed under reduced pressure and it
  2. customSolid obtained
  3. filtrationwas filtered
  4. customdried under reduced pressure
  5. additionwas added to it
  6. stirringstirring
  7. waitwas continued overnight
  8. customAfter completion of the reaction, reaction mass
  9. additionwas poured into ice
  10. customto obtain solid, which
  11. filtrationwas filtered
  12. washwashed with acetonitrile

Sources & evidence

ORD record
ord-f0ae081fea524770a3dc1efc3c7698c8
Source dataset
uspto-grants-2015_02
Patent number
US08962620B2

Reaction notes

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