Hydrochloric Acid → ethyl (2RS,3RS)-3-(3-chlorophenyl)-3-hydroxy-2-[3-(1,1,2,2-tetrafluoroethoxy)benzyl]propanoate

HRID 1610553Notes

Reaction equation

HRID 1610553 reaction equation
[BH4-].[Na+].[Cl:3][C:4]1[CH:5]=[C:6]([C:10](=[O:31])[CH:11]([CH2:17][C:18]2[CH:23]=[CH:22][CH:21]=[C:20]([O:24][C:25]([F:30])([F:29])[CH:26]([F:28])[F:27])[CH:19]=2)[C:12]([O:14][CH2:15][CH3:16])=[O:13])[CH:7]=[CH:8][CH:9]=1.Cl.O>C(OCC)C.[Cl-].[Zn+2].[Cl-]>[Cl:3][C:4]1[CH:5]=[C:6]([CH:10]([OH:31])[CH:11]([CH2:17][C:18]2[CH:23]=[CH:22][CH:21]=[C:20]([O:24][C:25]([F:30])([F:29])[CH:26]([F:28])[F:27])[CH:19]=2)[C:12]([O:14][CH2:15][CH3:16])=[O:13])[CH:7]=[CH:8][CH:9]=1

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 962WaterHCID 4311764Sodium borohydrideHCID 22261651Ethyl 3-(3-chlorophenyl)-3-oxo-2-[3-(1,1,2,2-tetrafluoroethoxy)benzyl]propanoate

Product 1

HCID 86593261ethyl (2RS,3RS)-3-(3-chlorophenyl)-3-hydroxy-2-[3-(1,1,2,2-tetrafluoroethoxy)benzyl]propanoate

Reagents, catalysts & solvents 2

HCID 3007855ZincchlorideCatalystHCID 3283Diethyl EtherSolvent2×

Procedure

To a solution of zinc chloride (4.66 g, 34.2 mmol) in diethyl ether (100 ml) was added sodium borohydride (2.59 g, 68.4 mmol), and the mixture was stirred at room temperature for 30 min. Insoluble material was filtered off, and a solution of ethyl 3-(3-chlorophenyl)-3-oxo-2-[3-(1,1,2,2-tetrafluoroethoxy)benzyl]propanoate (7.40 g, 17.1 mmol) in diethyl ether (30 ml) was added to the filtrate at 0° C. The mixture was stirred for 30 min. and 1N hydrochloric acid was added to the reaction solution to stop the reaction. Then, water (100 ml) was added and the mixture was extracted with ethyl acetate (100 ml×2). The extract was washed with water and saturated brine, dried (anhydrous magnesium sulfate) and evaporated under reduced pressure. The residue was purified by silica gel column chromatography (hexane:ethyl acetate=4:1) to give the objective substance (6.6 g, 89%).

Workup

  1. filtrationInsoluble material was filtered off
  2. stirringThe mixture was stirred for 30 min.
  3. customthe reaction
  4. extractionthe mixture was extracted with ethyl acetate (100 ml×2)
  5. washThe extract was washed with water and saturated brine
  6. dry with materialdried (anhydrous magnesium sulfate)
  7. customevaporated under reduced pressure
  8. customThe residue was purified by silica gel column chromatography (hexane:ethyl acetate=4:1)
  9. customto give the objective substance (6.6 g, 89%)

Sources & evidence

ORD record
ord-ae041d07d3b04af8a5485068a056ee09
Source dataset
uspto-grants-2006_01
Patent number
US06982348B2

Reaction notes

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