Water → tert-Butyl N-[7-[2,6-dimethoxy-4-(methoxymethyl)phenyl]-2-(methoxymethyl)pyrazolo[1,5-a]pyridin-3-yl)carbamate

HRID 347852

Reaction equation

HRID 347852 reaction equation
Br[C:2]1[N:7]2[N:8]=[C:9]([CH2:19][O:20][CH3:21])[C:10]([NH:11][C:12](=[O:18])[O:13][C:14]([CH3:17])([CH3:16])[CH3:15])=[C:6]2[CH:5]=[CH:4][CH:3]=1.O.[CH3:23][O:24][C:25]1[CH:30]=[C:29]([CH2:31][O:32][CH3:33])[CH:28]=[C:27]([O:34][CH3:35])[C:26]=1OB(O)O.O.O.O.O.O.O.O.O.[OH-].[Ba+2].[OH-]>COCCOC.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH3:35][O:34][C:27]1[CH:28]=[C:29]([CH2:31][O:32][CH3:33])[CH:30]=[C:25]([O:24][CH3:23])[C:26]=1[C:2]1[N:7]2[N:8]=[C:9]([CH2:19][O:20][CH3:21])[C:10]([NH:11][C:12](=[O:18])[O:13][C:14]([CH3:17])([CH3:16])[CH3:15])=[C:6]2[CH:5]=[CH:4][CH:3]=1

Participants

7

Reactant 4

HCID 962Water2×HCID 17749109Barium hydroxide, octahydrateHCID 21084187tert-butyl N-[7-bromo-2-(methoxymethyl)pyrazolo[1,5-a]pyridin-3-yl]carbamateHCID 230809452,6-Dimethoxy-4-methoxymethylphenylboric acid

Product 1

HCID 21084182tert-Butyl N-[7-[2,6-dimethoxy-4-(methoxymethyl)phenyl]-2-(methoxymethyl)pyrazolo[1,5-a]pyridin-3-yl)carbamateYield 63.6%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
80 °C

Procedure

To a solution of tert-butyl N-[7-bromo-2-(methoxymethyl)pyrazolo[1,5-a]pyridin-3-yl]carbamate (300 mg) dissolved in 1,2-dimethoxyethane (10 mL) and water (5 mL) was added 2,6-dimethoxy-4-methoxymethylphenylboric acid (323 mg), tetrakis(triphenylphosphine)palladium(0) (146 mg) and barium hydroxide octahydrate (398 mg), and the reaction mixture was heated and stirred for 2 hours at 80° C. under a nitrogen stream. Water was added to the obtained reaction mixture, the reaction mixture was extracted with ethyl acetate, and the organic extract was washed with brine. The obtained organic extract was dried over anhydrous magnesium sulfate and filtered, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography and the title compound (245 mg) was obtained as a light yellow amorphous solid from the n-hexane:ethyl acetate (1:1) fraction.

Workup

  1. temperaturethe reaction mixture was heated
  2. extractionthe reaction mixture was extracted with ethyl acetate
  3. extractionthe organic extract
  4. washwas washed with brine
  5. extractionThe obtained organic extract
  6. dry with materialwas dried over anhydrous magnesium sulfate
  7. filtrationfiltered
  8. customthe solvent was evaporated under reduced pressure
  9. customThe residue was purified by silica gel column chromatography

Sources & evidence

ORD record
ord-8f6d71eb0978460bbfc1f398e44ae35d
Source dataset
uspto-grants-2007_02
Patent number
US07176216B2

Linked notes

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