1,2-Dimethoxyethane → [5-(6-Methoxypyridazin-3-yl)-2-methylfuran-3-yl]methanol

HRID 1877178Notes

Reaction equation

HRID 1877178 reaction equation
C([Si]([O:8][CH2:9][C:10]1[CH:14]=[C:13]([CH2:15]B2OCC(C)(C)CO2)[O:12][C:11]=1[CH3:24])(C)C)(C)(C)C.ClC1[N:27]=[N:28][C:29]([O:32][CH3:33])=[CH:30][CH:31]=1.C(=O)([O-])[O-].[Na+].[Na+].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.O>[CH3:33][O:32][C:29]1[N:28]=[N:27][C:15]([C:13]2[O:12][C:11]([CH3:24])=[C:10]([CH2:9][OH:8])[CH:14]=2)=[CH:31][CH:30]=1

Participants

7

Reactant 4

HCID 80711,2-DimethoxyethaneHCID 10340Sodium CarbonateHCID 744033-Chloro-6-methoxypyridazineHCID 68511011Tert-butyl({5-[(5,5-dimethyl-1,3,2-dioxaborinan-2-yl)methyl]-2-methylfuran-3-yl}methoxy)dimethylsilane

Product 1

HCID 68509717[5-(6-Methoxypyridazin-3-yl)-2-methylfuran-3-yl]methanolYield 86.7%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolvent

Procedure

A mixture of tert-butyl({5-[(5,5-dimethyl-1,3,2-dioxaborinan-2-yl)methyl]-2-methylfuran-3-yl}methoxy)dimethylsilane (2.4 g), 3-chloro-6-methoxypyridazine (1.5 g), tetrakis(triphenylphosphine)palladium(0) (0.4 g), 2N aqueous sodium carbonate solution (7 mL) and 1,2-dimethoxyethane (20 mL) was stirred overnight with refluxing under an argon atmosphere. The reaction mixture was poured into water, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, and dried over magnesium sulfate. The solvent was evaporated under reduced pressure. The residue was dissolved in tetrahydrofuran (20 mL), 1N tetrabutylammonium fluoride in tetrahydrofuran (10 mL) was added, and the mixture was stirred at room temperature for 2 hr. The reaction mixture was poured into water, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, and dried over magnesium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel chromatography (40% ethyl acetate/hexane to 100% ethyl acetate/hexane) to give the title compound (1.3 g, 86%) as a white crystal.

Workup

  1. temperaturewith refluxing under an argon atmosphere
  2. extractionthe mixture was extracted with ethyl acetate
  3. washThe organic layer was washed with saturated brine
  4. dry with materialdried over magnesium sulfate
  5. customThe solvent was evaporated under reduced pressure
  6. dissolutionThe residue was dissolved in tetrahydrofuran (20 mL)
  7. addition1N tetrabutylammonium fluoride in tetrahydrofuran (10 mL) was added
  8. stirringthe mixture was stirred at room temperature for 2 hr
  9. additionThe reaction mixture was poured into water
  10. extractionthe mixture was extracted with ethyl acetate
  11. washThe organic layer was washed with saturated brine
  12. dry with materialdried over magnesium sulfate
  13. customThe solvent was evaporated under reduced pressure
  14. customthe residue was purified by silica gel chromatography (40% ethyl acetate/hexane to 100% ethyl acetate/hexane)

Sources & evidence

ORD record
ord-9fda35291a12411ab3e980dd512f8e2d
Source dataset
uspto-grants-2012_11
Patent number
US08309580B2

Reaction notes

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