Potassium Hydroxide → (5R)-3-(5-bromo-2-pyridyloxy)-4-(4-methylsulfonylphenyl)-5-methyl-5-(2,2,2-trifluoroethyl)-5H-furan-2-one

HRID 376362Notes

Reaction equation

HRID 376362 reaction equation
[CH3:1][C:2]1([CH2:19][C:20]([F:23])([F:22])[F:21])[C@@:7]2([C:8]3[CH:13]=[CH:12][C:11]([S:14]([CH3:17])(=[O:16])=[O:15])=[CH:10][CH:9]=3)[CH:5]([O:6]2)[C:4](=[O:18])[O:3]1.[K].[Br:25][C:26]1[CH:27]=[CH:28][C:29](O)=[N:30][CH:31]=1.[OH-].[K+]>CN(C)C=O.C(O)(C)C>[Br:25][C:26]1[CH:27]=[CH:28][C:29]([O:6][C:5]2[C:4](=[O:18])[O:3][C@:2]([CH3:1])([CH2:19][C:20]([F:23])([F:22])[F:21])[C:7]=2[C:8]2[CH:13]=[CH:12][C:11]([S:14]([CH3:17])(=[O:16])=[O:15])=[CH:10][CH:9]=2)=[N:30][CH:31]=1

Participants

7

Reactant 4

HCID 14797Potassium HydroxideHCID 5462222PotassiumHCID 21968267(5R)-4-methyl-4-(2,2,2-trifluoroethyl)-5-(4-methylsulfonylphenyl)-3,6-dioxabicyclo[3,1,0]hexan-2-oneHCID 178515818HCID 178515818, compound2×

Product 1

HCID 18397164(5R)-3-(5-bromo-2-pyridyloxy)-4-(4-methylsulfonylphenyl)-5-methyl-5-(2,2,2-trifluoroethyl)-5H-furan-2-one

Reagents, catalysts & solvents 2

HCID 3776IsopropanolSolventHCID 6228DimethylformamideSolvent

Procedure

To a 0° C. mixture of the epoxide(0.930 g) from step 1 in dimethylformamide(3 mL) and isopropanol(12 mL) was added the potassium salt of 5-bromo-2-hydroxypyridine, prepared from 5-bromo-2-hydroxypyridine and one equivalent of 8N KOH followed by evaporation to dryness with toluene and high vacuum drying, (0.742 g, 3.5 mmol) and the mixture was warmed up slowly to reflux for 16 hrs. It was then cooled to room temperature and poured on icy dilute ammonium chloride and ethyl acetate; the organic layer was separated and the aqueous further extracted ounce with ethyl acetate. The combined organic layers were washed with brine, dried with MgSO4 and the solvents were removed in vacuo to yield after purification on silica gel (10% acetone/toluene) the title compound (0.380 g).

Workup

  1. customfollowed by evaporation to dryness with toluene and high vacuum
  2. customdrying
  3. temperature(0.742 g, 3.5 mmol) and the mixture was warmed up slowly
  4. temperatureto reflux for 16 hrs
  5. additionpoured on icy dilute ammonium chloride and ethyl acetate
  6. customthe organic layer was separated
  7. washThe combined organic layers were washed with brine
  8. dry with materialdried with MgSO4
  9. customthe solvents were removed in vacuo
  10. customto yield
  11. customafter purification on silica gel (10% acetone/toluene) the title compound (0.380 g)

Sources & evidence

ORD record
ord-44d36b0fe74b459ab321441f4a47dbc3
Source dataset
uspto-grants-2000_02
Patent number
US06020343

Reaction notes

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