Hydrochloric Acid → HCID 86593301, compound

HRID 1610705Notes

Reaction equation

HRID 1610705 reaction equation
[F:1][CH:2]([C:7]1[CH:8]=[C:9]([CH:26]=[CH:27][CH:28]=1)[CH2:10][CH:11]([C:17]([C:19]1[CH:24]=[CH:23][C:22]([F:25])=[CH:21][CH:20]=1)=[O:18])[C:12]([O:14][CH2:15][CH3:16])=[O:13])[C:3]([F:6])([CH3:5])[CH3:4].Cl>C(OCC)C.[BH4-].[Zn+2].[BH4-]>[F:1][CH:2]([C:7]1[CH:8]=[C:9]([CH:26]=[CH:27][CH:28]=1)[CH2:10][CH:11]([CH:17]([C:19]1[CH:24]=[CH:23][C:22]([F:25])=[CH:21][CH:20]=1)[OH:18])[C:12]([O:14][CH2:15][CH3:16])=[O:13])[C:3]([F:6])([CH3:4])[CH3:5]

Participants

5

Reactant 2

HCID 313Hydrochloric AcidHCID 22262348HCID 22262348, compound

Product 1

HCID 86593301HCID 86593301, compound

Reagents, catalysts & solvents 2

HCID 12838295ZINC;boranuideCatalystHCID 3283Diethyl EtherSolvent

Procedure

While stirring zinc chloride (2.37 g, 17.4 mmol) in diethyl ether (50 ml), sodium borohydride (1.32 g, 34.8 mmol) was added at room temperature, and the mixture was stirred as it was for 2 hrs. The insoluble material in the mixture was removed by filtration and washed with diethyl ether to give a solution of zinc borohydride in diethyl ether. A solution of ethyl 2-[3-(1,2-difluoro-2-methylpropyl)benzyl]-3-(4-fluorophenyl)-3-oxopropionate(3.412 g, 8.695 mmol) in diethyl ether (20 ml) was added to the obtained solution under ice-cooling, and the mixture was stirred as it was for 20 min. To the reaction solution was added dilute hydrochloric acid by small portions to decompose excess zinc borohydride, and the mixture was extracted twice with ethyl acetate. The recovered organic layer was dried over anhydrous magnesium sulfate and the solvent was evaporated under reduced pressure. The obtained crude product was purified by silica gel column chromatography (hexane/ethyl acetate=3/1) to give the objective substance.

Workup

  1. temperaturecooling
  2. extractionthe mixture was extracted twice with ethyl acetate
  3. dry with materialThe recovered organic layer was dried over anhydrous magnesium sulfate
  4. customthe solvent was evaporated under reduced pressure
  5. customThe obtained crude product
  6. customwas purified by silica gel column chromatography (hexane/ethyl acetate=3/1)
  7. customto give the objective substance

Sources & evidence

ORD record
ord-3c9ba04f68aa4e9ba692a8349b5b5bc2
Source dataset
uspto-grants-2006_01
Patent number
US06982348B2

Reaction notes

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