Water → Ethyl 11-[3,17beta-dihydroxyestra-1,3,5(10)-trien-7alpha-yl]-2-(4,4,5,5,5-pentafluoropentyl)undecanoate

HRID 460470Notes

Reaction equation

HRID 460470 reaction equation
[OH:1][C@H:2]1[CH2:7][CH2:6][C@H:5]2[C@H:8]3[C@H:17]([CH2:18][CH2:19][C@:3]12[CH3:4])[C:16]1[CH:15]=[CH:14][C:13]([O:20]C)=[CH:12][C:11]=1[CH2:10][C@H:9]3[CH2:22][CH2:23][CH2:24][CH2:25][CH2:26][CH2:27][CH2:28][CH2:29][CH2:30][CH:31]([CH2:37][CH2:38][CH2:39][C:40]([F:46])([F:45])[C:41]([F:44])([F:43])[F:42])[C:32]([O:34][CH2:35][CH3:36])=[O:33].[Br-].[Br-].[Br-].B.O>ClCCl>[OH:20][C:13]1[CH:14]=[CH:15][C:16]2[C@@H:17]3[C@H:8]([C@H:5]4[C@@:3]([CH2:19][CH2:18]3)([CH3:4])[C@@H:2]([OH:1])[CH2:7][CH2:6]4)[C@H:9]([CH2:22][CH2:23][CH2:24][CH2:25][CH2:26][CH2:27][CH2:28][CH2:29][CH2:30][CH:31]([CH2:37][CH2:38][CH2:39][C:40]([F:45])([F:46])[C:41]([F:42])([F:43])[F:44])[C:32]([O:34][CH2:35][CH3:36])=[O:33])[CH2:10][C:11]=2[CH:12]=1

Participants

5

Reactant 3

HCID 962WaterHCID 86588528Ethyl 11-[17beta-hydroxy-3-methoxyestra-1,3,5(10)-trien-7alpha-yl]-2-(4,4,5,5,5-pentafluoropentyl)undecanoateHCID 178419136HCID 178419136, compound

Product 1

HCID 86588529Ethyl 11-[3,17beta-dihydroxyestra-1,3,5(10)-trien-7alpha-yl]-2-(4,4,5,5,5-pentafluoropentyl)undecanoateYield 72%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Conditions

Temperature
0 °C

Procedure

Ethyl 11-[17β-hydroxy-3-methoxyestra-1,3,5(10)-trien-7α-yl]-2-(4,4,5,5,5-pentafluoropentyl)undecanoate (946 mg, 1.43 mmol) was dissolved in dichloromethane (18 ml). To this solution, a 1M solution of borane tribromide in dichloromethane (4.3 ml, 4.3 mmol) was added dropwise at −78° C. The reaction mixture was warmed slowly and stirred for 3 hours at 0° C. Water was added to stop the reaction and the reaction mixture was extracted with ethyl acetate. The organic layer was washed with saturated aqueous sodium chloride, dried over anhydrous sodium sulfate, and then filtered. After concentration under reduced pressure, the resulting residue was purified by silica gel column chromatography (eluent: hexane/ethyl acetate=2/1) to give ethyl 11-[3,17β-dihydroxyestra-1,3,5(10)-trien-7α-yl]-2-(4,4,5,5,5-pentafluoro-pentyl)undecanoate (663 mg, Yield 72%).

Workup

  1. temperatureThe reaction mixture was warmed slowly
  2. customthe reaction
  3. extractionthe reaction mixture was extracted with ethyl acetate
  4. washThe organic layer was washed with saturated aqueous sodium chloride
  5. dry with materialdried over anhydrous sodium sulfate
  6. filtrationfiltered
  7. concentrationAfter concentration under reduced pressure
  8. customthe resulting residue was purified by silica gel column chromatography (eluent: hexane/ethyl acetate=2/1)

Sources & evidence

ORD record
ord-8dea40a69d024b63be1184a22de0ad64
Source dataset
uspto-grants-2007_03
Patent number
US07196081B2

Reaction notes

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