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

HRID 1159574Notes

Reaction equation

HRID 1159574 reaction equation
[F:1][C:2]([F:16])([CH2:12][CH2:13][CH2:14][CH3:15])[C:3](=[O:11])[CH2:4]P(=O)(OC)OC.[OH-].[Na+].[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:4]/[C:3](=[O:11])[C:2]([F:1])([F:16])[CH2:12][CH2:13][CH2:14][CH3:15])[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 14798Sodium 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 84.8%

Reagents, catalysts & solvents 1

HCID 15413tert-Butyl methyl etherSolvent2×

Procedure

To a solution uf dimethyl (3,3-difluoro-2-oxoheptyl)phosphonate (1) (1.109 g, 4.295 mmol) in t-butyl methyl ether (17 ml), sodium hydroxide (0.164 g, 4.10 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-tetrahydropyranyl-oxy)cyclopentyl]heptanate (2) (0.955 g, 2.40 mmol) in t-butyl methyl ether (3 ml), and water (0.32 ml) were added thereto, and 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 stirred, arid then, let to stand and 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 then 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) (1.079 g; 2.033 mmol; yield: 84.8%).

Workup

  1. temperaturethe mixed solution was heat
  2. temperaturerefluxed for approximately 48 hours
  3. temperatureAfter cooling to room temperature
  4. stirringstirred
  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-af81c9c2b91f40ba82ae26b46189c526
Source dataset
uspto-grants-2010_10
Patent number
US07812182B2

Reaction notes

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