Water → methyl 7-[(1R,2R,3R,5S)-5-acetoxy-2-((E)-4,4-difluoro-3-oxo-1-octenyl)-3-(2-tetrahydropyranyloxy)cyclopentyl]heptanate

HRID 1943063Notes

Reaction equation

HRID 1943063 reaction equation
COP([CH2:7][C:8](=[O:16])[C:9]([F:15])([F:14])[CH2:10][CH2:11][CH2:12][CH3:13])(=O)OC.[OH-].[K+].[C:19]([O:22][C@@H:23]1[C@H:27]([CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH2:33][C:34]([O:36][CH3:37])=[O:35])[C@@H:26]([CH:38]=O)[C@H:25]([O:40][CH:41]2[CH2:46][CH2:45][CH2:44][CH2:43][O:42]2)[CH2:24]1)(=[O:21])[CH3:20].O>COC(C)(C)C>[C:19]([O:22][C@@H:23]1[C@H:27]([CH2:28][CH2:29][CH2:30][CH2:31][CH2:32][CH2:33][C:34]([O:36][CH3:37])=[O:35])[C@@H:26](/[CH:38]=[CH:7]/[C:8](=[O:16])[C:9]([F:14])([F:15])[CH2:10][CH2:11][CH2:12][CH3:13])[C@H:25]([O:40][CH:41]2[CH2:46][CH2:45][CH2:44][CH2:43][O:42]2)[CH2:24]1)(=[O:21])[CH3:20]

Participants

6

Reactant 4

HCID 962Water2×HCID 14797Potassium HydroxideHCID 11118722Dimethyl (3,3-difluoro-2-oxoheptyl)phosphonateHCID 11729034methyl 7-[(1R,2R,3R,5S)-5-acetoxy-2-formyl-3-(2-tetrahydropyranyl-oxy)cyclopentyl]heptanate

Product 1

HCID 59514691methyl 7-[(1R,2R,3R,5S)-5-acetoxy-2-((E)-4,4-difluoro-3-oxo-1-octenyl)-3-(2-tetrahydropyranyloxy)cyclopentyl]heptanateYield 80.6%

Reagents, catalysts & solvents 1

HCID 15413tert-Butyl methyl etherSolvent2×

Procedure

To a solution of dimethyl (3,3-difluoro-2-oxoheptyl)phosphonate (1) (1.113 g, 4.31 mmol) in t-butyl methyl ether (17 ml), potassium hydroxide (0.225 g, 4.00 mmol) was added and the mixture was stirred for approximately 1.2 hours at room temperature. A solution of methyl 7-[(1R,2R,3R,5S)-5-acetoxy-2-formyl-3-(2-tetrahydro pyranyloxy)cyclopentyl]heptanate (2) (0.965 g, 2.42 mmol) in t-butyl methyl ether (3 ml) solution, and water (0.32 ml) were added thereto. The mixed solution was heat refluxed for approximately 48 hours. After cooling to room temperature, water (5.6 ml) was added to the solution and the mixture was stirred, let to stand and then separated into two layers. The aqueous layer was extracted twice with ethyl acetate (4 ml). The organic layers were combined, sequentially washed with 3% aqueous sodium chloride (6 ml) and saturated aqueous sodium chloride (6 ml), and dried with anhydrous magnesium sulfate. After concentration under reduced pressure, the residue was purified by silica gel column chromatography (Fuji Silysia BW-300SP: 33 g; ethyl acetate:hexane=1:4) to give methyl 7-[(1R,2R,3R,5S)-5-acetoxy-2-((E)-4,4-difluoro-3-oxo-1-octenyl)-3-(2-tetrahydropyranyloxy)cyclopentyl]heptanate (3) (1.035 g; 1.950 mmol; yield: 80.6%).

Workup

  1. temperatureThe mixed solution was heat
  2. temperaturerefluxed for approximately 48 hours
  3. temperatureAfter cooling to room temperature
  4. stirringthe mixture was stirred
  5. customseparated into two layers
  6. extractionThe aqueous layer was extracted twice with ethyl acetate (4 ml)
  7. washsequentially washed with 3% aqueous sodium chloride (6 ml) and saturated aqueous sodium chloride (6 ml)
  8. dry with materialdried with anhydrous magnesium sulfate
  9. concentrationAfter concentration under reduced pressure
  10. customthe residue was purified by silica gel column chromatography (Fuji Silysia BW-300SP: 33 g; ethyl acetate:hexane=1:4)

Sources & evidence

ORD record
ord-d7ae76ce11764a6cab668b6b90e2f898
Source dataset
uspto-grants-2013_03
Patent number
US08389748B2

Reaction notes

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