Trifluoroacetic acid → HCID 22388307, compound

HRID 1072815Notes

Reaction equation

HRID 1072815 reaction equation
FC(F)(F)C(O)=O.[BH4-].[Na+].[Cl:10][C:11]1[CH:16]=[C:15]([Cl:17])[CH:14]=[CH:13][C:12]=1[CH:18](O)[C:19]1[C:20]2[CH:28]=[C:27]([C:29]([O:31][CH3:32])=[O:30])[CH:26]=[CH:25][C:21]=2[O:22][C:23]=1[CH3:24].[OH-].[Na+]>C(Cl)Cl>[Cl:10][C:11]1[CH:16]=[C:15]([Cl:17])[CH:14]=[CH:13][C:12]=1[CH2:18][C:19]1[C:20]2[CH:28]=[C:27]([C:29]([O:31][CH3:32])=[O:30])[CH:26]=[CH:25][C:21]=2[O:22][C:23]=1[CH3:24]

Participants

6

Reactant 4

HCID 6422Trifluoroacetic acidHCID 14798Sodium HydroxideHCID 4311764Sodium borohydrideHCID 22387947HCID 22387947, compound

Product 1

HCID 22388307HCID 22388307, compound

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

Trifluoroacetic acid (50 ml) was ice-cooled and sodium borohydride (873 mg, 23.1 mmol) was gradually added over 20 min under a nitrogen atmosphere at 5-7° C. Thereto was dropwise added a solution of 3-((2,4-dichlorophenyl)-hydroxymethyl)-5-(methoxycarbonyl)-2-methylbenzo[b]furan in methylene chloride over 20 min, and the mixture was stirred at room temperature for 45 min. After the completion of the reaction, the reaction mixture was poured into ice water and a 25% aqueous sodium hydroxide solution was added to make an alkali solution. The solution was extracted with ethyl acetate. The organic layer was washed with saturated brine, and dried over anhydrous magnesium sulfate. The desiccant was filtered off and the filtrate was concentrated under reduced pressure. The crystalline residue was purified by silica gel column chromatography to give the objective compound (0.58 g, 72% in 2 steps) as colorless crystals.

Workup

  1. temperaturecooled
  2. customAfter the completion of the reaction
  3. extractionThe solution was extracted with ethyl acetate
  4. washThe organic layer was washed with saturated brine
  5. dry with materialdried over anhydrous magnesium sulfate
  6. filtrationThe desiccant was filtered off
  7. concentrationthe filtrate was concentrated under reduced pressure
  8. customThe crystalline residue was purified by silica gel column chromatography
  9. customto give the objective compound (0.58 g, 72% in 2 steps) as colorless crystals

Sources & evidence

ORD record
ord-39fe6ecb54a84c8ea03a2f7dcc167c32
Source dataset
uspto-grants-2005_06
Patent number
US06911469B2

Reaction notes

Loading…