Hydrochloric Acid → 8-[(2,6-difluorobenzyl)oxy]-N-[1,3-dihydroxy-2-(3-methylphenyl)propan-2-yl]-2-methylimidazo[1,2-a]pyridine-3-carboxamide

HRID 64491Notes

Reaction equation

HRID 64491 reaction equation
[F:1][C:2]1[CH:37]=[CH:36][CH:35]=[C:34]([F:38])[C:3]=1[CH2:4][O:5][C:6]1[C:7]2[N:8]([C:12]([C:16]([NH:18][C:19]3([C:27]4[CH:32]=[CH:31][CH:30]=[C:29]([CH3:33])[CH:28]=4)[CH2:24][O:23]C(C)(C)[O:21][CH2:20]3)=[O:17])=[C:13]([CH3:15])[N:14]=2)[CH:9]=[CH:10][CH:11]=1.O1CCOCC1.Cl.C(=O)([O-])O.[Na+]>C(OCC)(=O)C.O.CO>[F:1][C:2]1[CH:37]=[CH:36][CH:35]=[C:34]([F:38])[C:3]=1[CH2:4][O:5][C:6]1[C:7]2[N:8]([C:12]([C:16]([NH:18][C:19]([C:27]3[CH:32]=[CH:31][CH:30]=[C:29]([CH3:33])[CH:28]=3)([CH2:24][OH:23])[CH2:20][OH:21])=[O:17])=[C:13]([CH3:15])[N:14]=2)[CH:9]=[CH:10][CH:11]=1

Participants

8

Reactant 4

HCID 313Hydrochloric AcidHCID 312751,4-DioxaneHCID 516892Sodium BicarbonateHCID 86713526HCID 86713526, compound

Product 1

HCID 867135258-[(2,6-difluorobenzyl)oxy]-N-[1,3-dihydroxy-2-(3-methylphenyl)propan-2-yl]-2-methylimidazo[1,2-a]pyridine-3-carboxamideYield 61.9%

Reagents, catalysts & solvents 3

HCID 887MethanolSolventHCID 962WaterSolventHCID 8857Ethyl AcetateSolvent

Procedure

To 301 mg of 8-[(2,6-difluorobenzyl)oxy]-N-[2,2-dimethyl-5-(3-methylphenyl)-1,3-dioxan-5-yl]-2-methylimidazo[1,2-a]pyridine-3-carboxamide were added 3 ml of dioxane, 3 ml of methanol, and 6 ml of 1 M hydrochloric acid, followed by stirring for 14 hours. To the reaction mixture were added a saturated aqueous sodium hydrogen carbonate solution, water, and ethyl acetate under ice-cooling to carry out a layer separation operation. The organic layer was washed with a saturated aqueous sodium hydrogen carbonate solution and saturated brine in this order, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure and the obtained residue was purified by silica gel column chromatography. To the obtained purified product were added hexane and ethyl acetate, and the insoluble material was collected by filtration and dried to obtain 172 mg of 8-[(2,6-difluorobenzyl)oxy]-N-[1,3-dihydroxy-2-(3-methylphenyl)propan-2-yl]-2-methylimidazo[1,2-a]pyridine-3-carboxamide.

Workup

  1. temperaturecooling
  2. customa layer separation operation
  3. washThe organic layer was washed with a saturated aqueous sodium hydrogen carbonate solution and saturated brine in this order
  4. dry with materialdried over anhydrous magnesium sulfate
  5. customThe solvent was evaporated under reduced pressure
  6. customthe obtained residue was purified by silica gel column chromatography
  7. customTo the obtained purified product
  8. additionwere added hexane and ethyl acetate
  9. filtrationthe insoluble material was collected by filtration
  10. customdried

Sources & evidence

ORD record
ord-7afd8ded8bd144dfb86fe9b1533091c1
Source dataset
uspto-grants-2016_09
Patent number
US09447090B2

Reaction notes

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