Tetrahydrofuran → 17alpha-Acetyl-17beta-hydroxy-6,16-dimethyleneandrost-4-en-3-one

HRID 370417

Reaction equation

HRID 370417 reaction equation
S(=O)(=O)(O)O.O.[C:7]([C@:9]1([OH:31])[C:14](=[CH2:15])[CH2:13][C@H:12]2[C@H:16]3[C@H:26]([CH2:27][CH2:28][C@:10]12[CH3:11])[C@:24]1([CH3:25])[C:19](=[CH:20][C:21](=[O:29])[CH2:22][CH2:23]1)[C:18](=[CH2:30])[CH2:17]3)#[CH:8].C1C[O:35]CC1.C(=O)([O-])[O-].[Na+].[Na+]>O.CO>[C:7]([C@:9]1([OH:31])[C:14](=[CH2:15])[CH2:13][C@H:12]2[C@H:16]3[C@H:26]([CH2:27][CH2:28][C@:10]12[CH3:11])[C@:24]1([CH3:25])[C:19](=[CH:20][C:21](=[O:29])[CH2:22][CH2:23]1)[C:18](=[CH2:30])[CH2:17]3)(=[O:35])[CH3:8]

Participants

7

Reactant 4

HCID 8028TetrahydrofuranHCID 10340Sodium CarbonateHCID 1331492917alpha-Ethynyl-17beta-hydroxy-6,16-dimethyleneandrosta-4-en-3-oneHCID 21910475Sulfuric acid hydrate (1:1)

Product 1

HCID 1331493117alpha-Acetyl-17beta-hydroxy-6,16-dimethyleneandrost-4-en-3-one

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 962WaterSolvent

Procedure

Mercuric oxide red (0.32 g) was mixed with sulfuric acid/water (sulfuric acid, 0.4 ml; water, 6.0 ml) and let stand overnight. 17α-Ethynyl-17β-hydroxy-6,16-dimethyleneandrosta-4-en-3-one (Example 6, 5.0 g) is mixed with THF (15 ml). The mercuric sulfate solution is added the reaction heated to 41°-49° over a period of 6 hrs at which time TLC indicates the reaction is completed. Sodium carbonate (0.79 g) in water (10 ml) is added and the mixture stirred for 5 min. Celite (5 g) is added and the mixture stirred 1/2 hr at 20°-25°. The mixture is filtered through Celite (5 g), the solids washed with methanol/THF; 1/1 (2×10 ml) and once with THF (10 ml), followed by methylene chloride (10 ml). The filtrate and washings are concentrated under reduced pressure to about 35 ml, at which point crystals begin forming. Methanol (50 ml) is added and the mixture again concentrated under reduced pressure and permitted to sit overnight at 20°-25° under nitrogen atmosphere. Water (500 ml) is added, slowly at first, with stirring over a period of 15 min. The mixture is filtered, the solids washed with water (3×20 ml), and hexane (2×10 ml). The solids were dried under nitrogen to give the title compound.

Workup

  1. temperatureheated to 41°-49° over a period of 6 hrs at which time TLC
  2. additionCelite (5 g) is added
  3. stirringthe mixture stirred 1/2 hr at 20°-25°
  4. filtrationThe mixture is filtered through Celite (5 g)
  5. washthe solids washed with methanol/THF
  6. concentrationThe filtrate and washings are concentrated under reduced pressure to about 35 ml, at which point crystals
  7. custombegin forming
  8. concentrationthe mixture again concentrated under reduced pressure
  9. waitto sit overnight at 20°-25° under nitrogen atmosphere
  10. additionWater (500 ml) is added
  11. stirringslowly at first, with stirring over a period of 15 min
  12. filtrationThe mixture is filtered
  13. washthe solids washed with water (3×20 ml), and hexane (2×10 ml)
  14. customThe solids were dried under nitrogen

Sources & evidence

ORD record
ord-9300bccb16934074bf973a027089620a
Source dataset
uspto-grants-1985_07
Patent number
US04526720

Linked notes

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