Ethyl Acetate → tert-butyl N-(7-bromo-2-methoxypyrazolo[1,5-a]pyridin-3-yl)-N-cyclopropylmethylcarbamate

HRID 2253377Notes

Reaction equation

HRID 2253377 reaction equation
[H-].[Na+].[Br:3][C:4]1[N:9]2[N:10]=[C:11]([O:21][CH3:22])[C:12]([NH:13][C:14](=[O:20])[O:15][C:16]([CH3:19])([CH3:18])[CH3:17])=[C:8]2[CH:7]=[CH:6][CH:5]=1.Br[CH2:24][CH:25]1[CH2:27][CH2:26]1.C(OCC)(=O)C>CN(C)C=O>[Br:3][C:4]1[N:9]2[N:10]=[C:11]([O:21][CH3:22])[C:12]([N:13]([CH2:24][CH:25]3[CH2:27][CH2:26]3)[C:14](=[O:20])[O:15][C:16]([CH3:17])([CH3:18])[CH3:19])=[C:8]2[CH:7]=[CH:6][CH:5]=1

Participants

6

Reactant 4

HCID 8857Ethyl AcetateHCID 24758Sodium hydrideHCID 81503BromomethylcyclopropaneHCID 21984642tert-butyl N-(7-bromo-2-methoxypyrazolo[1,5-a]pyridin-3-yl)carbamate

Product 1

HCID 21084188tert-butyl N-(7-bromo-2-methoxypyrazolo[1,5-a]pyridin-3-yl)-N-cyclopropylmethylcarbamate

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

Sodium hydride (60% in oil; 24.6 mg) was added to a solution of tert-butyl N-(7-bromo-2-methoxypyrazolo[1,5-a]pyridin-3-yl)carbamate (140 mg) in N,N-dimethylformamide (10 mL) at room temperature and the reaction mixture was stirred for 30 minutes. (Bromomethyl)cyclopropane (0.06 mL) was added thereto at the same temperature, and the reaction mixture was stirred for 1 hour at 60° C. After completion of the reaction, the reaction mixture was gradually added to ice, extraction was performed with ethyl acetate, the organic extract was washed with water and brine, dried over anhydrous magnesium sulfate and filtered, and the solvent was evaporated under reduced pressure to afford a crude product of tert-butyl N-(7-bromo-2-methoxypyrazolo[1,5-a]pyridin-3-yl)-N-cyclopropylmethylcarbamate.

Workup

  1. stirringat the same temperature, and the reaction mixture was stirred for 1 hour at 60° C
  2. customAfter completion of the reaction
  3. additionthe reaction mixture was gradually added to ice, extraction
  4. extractionthe organic extract
  5. washwas washed with water and brine
  6. dry with materialdried over anhydrous magnesium sulfate
  7. filtrationfiltered
  8. customthe solvent was evaporated under reduced pressure

Sources & evidence

ORD record
ord-9f87c0d74a4a494f81fe5d18ccbbc177
Source dataset
uspto-grants-2008_01
Patent number
US07323569B2

Reaction notes

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