Hydrochloric Acid → tert-butyl (6S,7R)-7-(3,4-dichlorophenyl)-6-(2,2,2-trifluoro-1-hydroxyethyl)-1,4-oxazepane-4-carboxylate

HRID 1022717Notes

Reaction equation

HRID 1022717 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([C@@H:9]2[O:15][CH2:14][CH2:13][N:12]([C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])[CH2:11][C@H:10]2[CH:23]=[O:24])[CH:5]=[CH:6][C:7]=1[Cl:8].C[Si](C)(C)[C:27]([F:30])([F:29])[F:28].[F-].C([N+](CCCC)(CCCC)CCCC)CCC.Cl>C1COCC1.O>[Cl:1][C:2]1[CH:3]=[C:4]([C@@H:9]2[O:15][CH2:14][CH2:13][N:12]([C:16]([O:18][C:19]([CH3:20])([CH3:21])[CH3:22])=[O:17])[CH2:11][C@H:10]2[CH:23]([OH:24])[C:27]([F:30])([F:29])[F:28])[CH:5]=[CH:6][C:7]=1[Cl:8]

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 552549(Trifluoromethyl)trimethylsilaneHCID 2724141Tetrabutylammonium FluorideHCID 86663853tert-butyl (6R,7R)-7-(3,4-dichlorophenyl)-6-formyl-1,4-oxazepane-4-carboxylate

Product 1

HCID 66975536tert-butyl (6S,7R)-7-(3,4-dichlorophenyl)-6-(2,2,2-trifluoro-1-hydroxyethyl)-1,4-oxazepane-4-carboxylateYield 77.2%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent2×

Procedure

To a solution (2.6 mL) of tert-butyl (6R,7R)-7-(3,4-dichlorophenyl)-6-formyl-1,4-oxazepane-4-carboxylate (100 mg) in THF were added a solution (1.0 M, 0.534 mL) of trimethyl(trifluoromethyl)silane (190 mg) and tetrabutylammonium fluoride in THF under ice-cooling, and the mixture was stirred at room temperature overnight. To the reaction mixture was added 1 M hydrochloric acid (0.5 ml), and the mixture was further stirred for 3 hr. Distilled water was added, and the mixture was extracted with ethyl acetate. The extract was washed with distilled water and brine, and dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel chromatography (hexane/ethyl acetate) to give the title compound (91.7 mg).

Workup

  1. temperaturecooling
  2. stirringthe mixture was further stirred for 3 hr
  3. extractionthe mixture was extracted with ethyl acetate
  4. washThe extract was washed with distilled water and brine
  5. dry with materialdried over anhydrous magnesium sulfate
  6. customthe solvent was evaporated under reduced pressure
  7. customThe residue was purified by silica gel chromatography (hexane/ethyl acetate)

Sources & evidence

ORD record
ord-db768316e77b413c9b72a5b2f44a30c6
Source dataset
uspto-grants-2014_05
Patent number
US08722662B2

Reaction notes

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