Methanol → HCID 54032229, compound

HRID 1955709Notes

Reaction equation

HRID 1955709 reaction equation
[F:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][C:10]=1[F:11])[C:7](=[CH:12][C:13]1[CH:18]=[CH:17][C:16]([S:19][CH3:20])=[CH:15][CH:14]=1)[C:6]([CH3:21])=[C:5]2[CH2:22][C:23]([OH:25])=[O:24].CO.I([O-])(=O)(=O)=[O:29].[Na+]>CC(C)=O.O>[F:1][C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][C:10]=1[F:11])[C:7](=[CH:12][C:13]1[CH:18]=[CH:17][C:16]([S:19]([CH3:20])=[O:29])=[CH:15][CH:14]=1)[C:6]([CH3:21])=[C:5]2[CH2:22][C:23]([OH:25])=[O:24]

Participants

6

Reactant 3

HCID 887Methanol2×HCID 23667635Sodium periodateHCID 54220384HCID 54220384, compound

Product 1

HCID 54032229HCID 54032229, compound

Reagents, catalysts & solvents 2

HCID 180AcetoneSolvent2×HCID 962WaterSolvent2×

Procedure

To a solution of 0.358 g (1.0 mmol) of 5,6-difluoro-2-methyl-1-(p-methylthiobenzylidene)-indene-3-acetic acid in acetone (10 ml) is added 10-15 ml MeOH. With magnetic stirring 0.32 g (1.5 mmol) of sodium meta periodate is added in 5 ml of water. The proportions of acetone, methanol and water are adjusted if necessary in order to preserve homogeneity. After several minutes, a precipitation of sodium iodate appears. The suspension is stirred at room temperature for 16 h, and is then poured into approximately 50 ml of water and 100 ml methylene chloride. The two phases are separated and extracted twice with methylene chloride. The organic layer is washed with water and dried (MgSO4). The residue after evaporation is dissolved in the minimum amount of boiling ethyl acetate and is allowed to stand for 12 h in the freezer compartment. The deep orange crystals are filtered. The filtrate is reduced to 1/2 volume and allowed to stand in the cold for several hours to give a large second crop. In this way, 5,6-difluoro-2-methyl-1-(p-methylsulfinylbenzylidene)-3-indenylacetic acid is isolated, m.p. 200°-210° C.

Workup

  1. waitAfter several minutes
  2. customa precipitation of sodium iodate
  3. additionis then poured into approximately 50 ml of water and 100 ml methylene chloride
  4. customThe two phases are separated
  5. extractionextracted twice with methylene chloride
  6. washThe organic layer is washed with water
  7. dry with materialdried (MgSO4)
  8. customThe residue after evaporation
  9. dissolutionis dissolved in the minimum amount of boiling ethyl acetate
  10. waitto stand for 12 h in the freezer compartment
  11. filtrationThe deep orange crystals are filtered
  12. customcold for several hours
  13. customto give a large second crop

Sources & evidence

ORD record
ord-7832e4ca76364f84b9d3b7546a48d2aa
Source dataset
uspto-grants-1998_07
Patent number
US05776962

Reaction notes

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