Sodium periodate → (R)-4-(5-bromo-2-fluoro-phenyl)-3-(2,4-dimethoxy-benzyl)-4-methyl-[1,2,3]oxathiazolidine 2,2-dioxide

HRID 920145Notes

Reaction equation

HRID 920145 reaction equation
[Br:1][C:2]1[CH:3]=[CH:4][C:5]([F:26])=[C:6]([C:8]2([CH3:25])[CH2:12][O:11][S@@:10](=[O:13])[N:9]2[CH2:14][C:15]2[CH:20]=[CH:19][C:18]([O:21][CH3:22])=[CH:17][C:16]=2[O:23][CH3:24])[CH:7]=1.I([O-])(=O)(=O)=[O:28].[Na+]>C(OCC)(=O)C.C(#N)C.O.[Ru](Cl)(Cl)Cl>[Br:1][C:2]1[CH:3]=[CH:4][C:5]([F:26])=[C:6]([C@:8]2([CH3:25])[CH2:12][O:11][S:10](=[O:28])(=[O:13])[N:9]2[CH2:14][C:15]2[CH:20]=[CH:19][C:18]([O:21][CH3:22])=[CH:17][C:16]=2[O:23][CH3:24])[CH:7]=1

Participants

7

Reactant 2

HCID 23667635Sodium periodateHCID 90023517(R)-4-(5-bromo-2-fluoro-phenyl)-3-(2,4-dimethoxy-benzyl)-4-methyl-[1,2,3]oxathiazolidine 2-oxide

Product 1

HCID 90016409(R)-4-(5-bromo-2-fluoro-phenyl)-3-(2,4-dimethoxy-benzyl)-4-methyl-[1,2,3]oxathiazolidine 2,2-dioxideYield 96%

Reagents, catalysts & solvents 4

HCID 61850Ruthenium trichlorideCatalystHCID 962WaterSolventHCID 6342AcetonitrileSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
23 °C

Procedure

To a mixture of (R)-4-(5-bromo-2-fluoro-phenyl)-3-(2,4-dimethoxy-benzyl)-4-methyl-[1,2,3]oxathiazolidine 2-oxide (15.7 g, 35.3 mmol, Eq: 1.00) and sodium periodate (8.31 g, 38.9 mmol, Eq: 1.1) in ethyl acetate (120 ml), acetonitrile (120 ml) and cold water (192 ml) at 23° C. was added ruthenium(III) chloride (73.3 mg, 353 μmol, Eq: 0.01) and this reaction mixture was stirred vigorously at 23° C. for 30 minutes. Extracted with sat NaHCO3, ethyl acetate, dried the organic layer over Na2SO4, filtered off and evaporated totally. The residue was purified by silica gel column chromatography with heptane/ethyl acetate to give the. The product fractions were collected and totally evaporated, dried in HV to give the (R)-4-(5-bromo-2-fluoro-phenyl)-3-(2,4-dimethoxy-benzyl)-4-methyl-[1,2,3]oxathiazolidine 2,2-dioxide (15.6 g, 33.9 mmol, 95.9% yield) as a white solid. MS (ISN): m/z=458.0 [M−H]− and 460.0 [M+2H]−.

Workup

  1. extractionExtracted with sat NaHCO3, ethyl acetate
  2. dry with materialdried the organic layer over Na2SO4
  3. filtrationfiltered off
  4. customevaporated totally
  5. customThe residue was purified by silica gel column chromatography with heptane/ethyl acetate
  6. customto give the
  7. customThe product fractions were collected
  8. customtotally evaporated
  9. customdried in HV

Sources & evidence

ORD record
ord-d6b9eb88b1924ff59aa91c8be8c229d2
Source dataset
uspto-grants-2016_03
Patent number
US09273042B2

Reaction notes

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