Potassium Carbonate → [(3R*,4S*,5S*)-5-(3,5-Difluoro-4-nitro-benzyl)-4-hydroxy-1,1-dioxo-hexahydro-1lambda*6*-thiopyran-3-yl]-carbamic acid tert-butyl ester

HRID 420304Notes

Reaction equation

HRID 420304 reaction equation
[C:1]([O:5][C:6](=[O:27])[NH:7][C@@H:8]1[C@@H:13]([OH:14])[C@H:12]([CH2:15][C:16]2[CH:21]=[C:20]([F:22])[C:19]([N+:23]([O-:25])=[O:24])=[C:18]([F:26])[CH:17]=2)[CH2:11]S[CH2:9]1)([CH3:4])([CH3:3])[CH3:2].O[O:29][S:30]([O-:32])=O.[K+].CC([O-])=O.[Na+].S(S([O-])=O)([O-])(=O)=O.[Na+].[Na+].C([O-])([O-])=O.[K+].[K+]>C1COCC1.O>[C:1]([O:5][C:6](=[O:27])[NH:7][C@@H:8]1[C@@H:13]([OH:14])[C@H:12]([CH2:15][C:16]2[CH:21]=[C:20]([F:22])[C:19]([N+:23]([O-:25])=[O:24])=[C:18]([F:26])[CH:17]=2)[CH2:11][S:30](=[O:32])(=[O:29])[CH2:9]1)([CH3:3])([CH3:4])[CH3:2]

Participants

7

Reactant 5

HCID 11430Potassium CarbonateHCID 517045Sodium AcetateHCID 656671Sodium PyrosulfiteHCID 23707502Potassium hydroxy sulfiteHCID 57386308[(3R,4S,5S)-5-(3,5-difluoro-4-nitro-benzyl)-4-hydroxy-tetrahydro-thiopyran-3-yl]-carbamic acid tert-butyl ester

Product 1

HCID 131729378[(3R*,4S*,5S*)-5-(3,5-Difluoro-4-nitro-benzyl)-4-hydroxy-1,1-dioxo-hexahydro-1lambda*6*-thiopyran-3-yl]-carbamic acid tert-butyl ester

Reagents, catalysts & solvents 1

HCID 21881883Oxolane--water (1/1)Solvent

Conditions

Temperature
40 °C

Procedure

To a solution of [(3R,4S,5S)-5-(3,5-difluoro-4-nitro-benzyl)-4-hydroxy-tetrahydro-thiopyran-3-yl]-carbamic acid tert-butyl ester (2.05 g, 4.9 mmol) in THF-water 1:1 (60 mL) was added oxone (6.52 g, 10.3 mmol). After stirring the reaction mixture for 2 h at 40° C., 2 g NaOAc and 2 g sodium metabisulfite were added. The reaction mixture was stirred for 0.5 h, basified with saturated aq. K2CO3 solution and the product was extracted with EtOAc. Combined organic extracts were washed with brine, dried over MgSO4, filtered and concentrated to provide the title compound after crystallization from THF-hexane as yellow crystals: TLC (hexane-THF 1:1) Rf=0.23; HPLC RtA=1.76 min; ESIMS [M+NH4]+=454; 1H NMR (600 MHz, DMSO-d6): δ 7.32 (d, 2H), 6.91 (d, 1H), 3.73 (m, 1H), 3.0-3.2 (m, 5H), 2.94 (m, 1H), 2.74 (dd, 1H), 2.18 (m, 1H), 1.38 (s, 9H).

Workup

  1. stirringThe reaction mixture was stirred for 0.5 h
  2. extractionthe product was extracted with EtOAc
  3. washCombined organic extracts were washed with brine
  4. dry with materialdried over MgSO4
  5. filtrationfiltered
  6. concentrationconcentrated

Sources & evidence

ORD record
ord-b88e1ff6c7524867b51947f887494cf8
Source dataset
uspto-grants-2012_01
Patent number
US08093406B2

Reaction notes

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