Sodium hydride → 1-[(5-bromo-1H-pyrazolo[3,4-b]pyridin-3-yl)methyl]-4-(2,2-difluorovinyl)pyrrolidin-2-one

HRID 1924296Notes

Reaction equation

HRID 1924296 reaction equation
[F:1][C:2]([F:10])=[CH:3][CH:4]1[CH2:8][NH:7][C:6](=[O:9])[CH2:5]1.[H-].[Na+].[Br:13][C:14]1[CH:15]=[C:16]2[C:22]([CH2:23]Br)=[N:21][N:20](C(OC(C)(C)C)=O)[C:17]2=[N:18][CH:19]=1>CN(C=O)C.O>[Br:13][C:14]1[CH:15]=[C:16]2[C:22]([CH2:23][N:7]3[CH2:8][CH:4]([CH:3]=[C:2]([F:10])[F:1])[CH2:5][C:6]3=[O:9])=[N:21][NH:20][C:17]2=[N:18][CH:19]=1

Participants

6

Reactant 3

HCID 24758Sodium hydrideHCID 17948959HCID 17948959, compoundHCID 67085957tert-Butyl 5-bromo-3-(bromomethyl)-1H-pyrazolo[3,4-b]pyridine-1-carboxylate

Product 1

HCID 1785160371-[(5-bromo-1H-pyrazolo[3,4-b]pyridin-3-yl)methyl]-4-(2,2-difluorovinyl)pyrrolidin-2-oneYield 4.9%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent2×

Procedure

To a solution of 4-(2,2-difluorovinyl)pyrrolidin-2-one x98 (2.86 mmol, 2 eq, 0.42 g) in dry DMF (5 ml) maintained at 0° C. is added natrium hydride (60% dispersion in oil; 2.86 mmol, 2 eq, 0.114 g). The resulting mixture is stirred at room temperature for 0.5 hour and tert-butyl 5-bromo-3-(bromomethyl)-1H-pyrazolo[3,4-b]pyridine-1-carboxylate x155 (1.43 mmol, 1 eq, 0.56 g) dissolved in DMF (2 ml) is added. The resulting mixture is stirred overnight at room temperature. The mixture is poured in water and extracted with AcOEt. The cumulated organic layers are dried over MgSO4, filtered and evaporated under reduced pressure. The crude mixture is purified twice by chromatography on silicagel (CH2Cl2/MeOH/NH4OH 98/2/0.2) to afford pure 1-[(5-bromo-1H-pyrazolo[3,4-b]pyridin-3-yl)methyl]-4-(2,2-difluorovinyl)pyrrolidin-2-one 221 (0.025 g).

Workup

  1. additionis added
  2. stirringThe resulting mixture is stirred overnight at room temperature
  3. extractionextracted with AcOEt
  4. dry with materialThe cumulated organic layers are dried over MgSO4
  5. filtrationfiltered
  6. customevaporated under reduced pressure
  7. customThe crude mixture is purified twice by chromatography on silicagel (CH2Cl2/MeOH/NH4OH 98/2/0.2)

Sources & evidence

ORD record
ord-9a8fa9937c5447819317a400e3005649
Source dataset
uspto-grants-2012_05
Patent number
US08178533B2

Reaction notes

Loading…