Sodium Thiosulfate → tert-butyl (6R,7R)-7-(3,4-dichlorophenyl)-6-formyl-1,4-oxazepane-4-carboxylate

HRID 1022616Notes

Reaction equation

HRID 1022616 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[CH2:23][OH:24])[CH:5]=[CH:6][C:7]=1[Cl:8].CC(OI1(OC(C)=O)(OC(C)=O)OC(=O)C2C=CC=CC1=2)=O.C(=O)([O-])O.[Na+].S([O-])([O-])(=O)=S.[Na+].[Na+]>C(#N)C>[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]=[O:24])[CH:5]=[CH:6][C:7]=1[Cl:8]

Participants

6

Reactant 4

HCID 24477Sodium ThiosulfateHCID 159087TriacetoxyperiodinaneHCID 516892Sodium BicarbonateHCID 66975404tert-butyl (6S,7R)-7-(3,4-dichlorophenyl)-6-(hydroxymethyl)-1,4-oxazepane-4-carboxylate

Product 1

HCID 86663853tert-butyl (6R,7R)-7-(3,4-dichlorophenyl)-6-formyl-1,4-oxazepane-4-carboxylateYield 83.4%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

To a solution of tert-butyl (6S,7R)-7-(3,4-dichlorophenyl)-6-(hydroxymethyl)-1,4-oxazepane-4-carboxylate (10 g) in acetonitrile (133 ml) was added Dess-Martin periodinane (13.53 g) under ice-cooling, and the mixture was stirred under ice-cooling for 3 hr. To the reaction mixture were added saturated aqueous sodium hydrogen carbonate and aqueous saturated sodium thiosulfate solution at room temperature, and the mixture was stirred at room temperature for 1 hr. The reaction mixture was extracted with ethyl acetate. The extract was washed with distilled water and brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel chromatography (hexane/ethyl acetate) to give the title compound (8.3 g).

Workup

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

Sources & evidence

ORD record
ord-780e934b18d6404d9fadb65c7df50517
Source dataset
uspto-grants-2014_05
Patent number
US08722662B2

Reaction notes

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