Water → tert-butyl N-[7-(2-methoxy-4,6-dimethylphenyl)-2-(methylsulfanyl)pyrazolo[1,5-a]pyridin-3-yl]-N-(2-oxetanylmethyl)carbamate

HRID 1865015Notes

Reaction equation

HRID 1865015 reaction equation
[CH3:1][O:2][C:3]1[CH:8]=[C:7]([CH3:9])[CH:6]=[C:5]([CH3:10])[C:4]=1[C:11]1[N:16]2[N:17]=[C:18]([S:28][CH3:29])[C:19]([NH:20][C:21](=[O:27])[O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[C:15]2[CH:14]=[CH:13][CH:12]=1.[H-].[Na+].CC1C=CC(S(O[CH2:43][CH:44]2[CH2:47][CH2:46][O:45]2)(=O)=O)=CC=1.O>CN(C)C=O.C(OCC)(=O)C>[CH3:1][O:2][C:3]1[CH:8]=[C:7]([CH3:9])[CH:6]=[C:5]([CH3:10])[C:4]=1[C:11]1[N:16]2[N:17]=[C:18]([S:28][CH3:29])[C:19]([N:20]([CH2:43][CH:44]3[CH2:47][CH2:46][O:45]3)[C:21](=[O:27])[O:22][C:23]([CH3:25])([CH3:24])[CH3:26])=[C:15]2[CH:14]=[CH:13][CH:12]=1

Participants

7

Reactant 4

HCID 962WaterHCID 24758Sodium hydride2×HCID 13927594Oxetan-2-ylmethyl 4-methylbenzenesulfonate2×HCID 21984503tert-Butyl N-[7-(2-methoxy-4,6-dimethylphenyl)-2-(methylsulfanyl)pyrazolo[1,5-a]pyridin-3-yl]carbamate

Product 1

HCID 21984508tert-butyl N-[7-(2-methoxy-4,6-dimethylphenyl)-2-(methylsulfanyl)pyrazolo[1,5-a]pyridin-3-yl]-N-(2-oxetanylmethyl)carbamate

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

After dissolving tert-butyl N-[7-(2-methoxy-4,6-dimethylphenyl)-2-(methylsulfanyl)pyrazolo[1,5-a]pyridin-3-yl]carbamate (100 mg) in N,N-dimethylformamide (2 mL), sodium hydride (60%, 15 mg) was added while cooling on ice, the mixture was stirred for 30 minutes, 2-oxetanylmethyl 4-methyl-1-benzenesulfonate (70 mg) was added and the mixture was stirred for 1 hour at 40° C. 2-Oxetanylmethyl 4-methyl-1-benzenesulfonate (23 mg) [CAS No. 115845-51-7] and sodium hydride (60%, 5 mg) were again added, and the mixture was stirred for 1 hour. Water was added to the reaction mixture, extraction was performed with ethyl acetate and the extract washed with brine. After drying the obtained organic layer over anhydrous magnesium sulfate and filtering it, the solvent was concentrated under reduced pressure to obtain crude tert-butyl N-[7-(2-methoxy-4,6-dimethylphenyl)-2-(methylsulfanyl)pyrazolo[1,5-a]pyridin-3-yl]-N-(2-oxetanylmethyl)carbamate. This was dissolved in ethyl acetate (2 mL) without purification, a 4 N hydrochloric acid/ethyl acetate solution (1 mL) was added, and the mixture was stirred at room temperature for 1 hour. The reaction mixture was neutralized with 5 N aqueous sodium hydroxide while cooling on ice, and then extraction was performed with ethyl acetate and the organic layer was washed with brine. After drying the obtained organic layer over anhydrous magnesium sulfate and filtering it, the solvent was concentrated under reduced pressure, the residue was purified by silica gel column chromatography, and the title compound (8 mg) was obtained from the n-hexane:ethyl acetate (3:1) fraction as a yellow oil.

Workup

  1. additionwas added
  2. temperaturewhile cooling on ice
  3. stirringthe mixture was stirred for 1 hour at 40° C
  4. stirringthe mixture was stirred for 1 hour
  5. washthe extract washed with brine
  6. dry with materialAfter drying the obtained organic layer over anhydrous magnesium sulfate
  7. filtrationfiltering it
  8. concentrationthe solvent was concentrated under reduced pressure

Sources & evidence

ORD record
ord-485e40ac41f442eea0cd946e1f501efd
Source dataset
uspto-grants-2009_12
Patent number
US07625925B2

Reaction notes

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