Sodium Hydroxide → HCID 69625181, compound

HRID 1263731Notes

Reaction equation

[BH4-].[Na+].[OH-].[Na+].[CH2:5]([C@@H:7]1[CH2:24][C:23]2[CH:22]=[C:21]([O:25][CH3:26])[CH:20]=[CH:19][C:18]=2[C@@H:17]2[C@@H:8]1[C:9]1[C@@:13]([CH2:15][CH2:16]2)([CH3:14])[C:12](=[O:27])[CH2:11][CH:10]=1)[CH3:6]>CO.ClCCl>[CH2:5]([C@@H:7]1[CH2:24][C:23]2[CH:22]=[C:21]([O:25][CH3:26])[CH:20]=[CH:19][C:18]=2[C@@H:17]2[C@@H:8]1[C:9]1[C@@:13]([CH2:15][CH2:16]2)([CH3:14])[C@@H:12]([OH:27])[CH2:11][CH:10]=1)[CH3:6]

Participants

Conditions

Temperature: 0 °C

Procedure

ix)-A solution of sodium borohydride (0.21 g) and sodium hydroxide (0.44 g) in methanol (50 ml) was added dropwise to a solution of (7α)-7-ethyl-3-methoxyestra-1,3,5(10),14-tetraen-17-one (4.31 g) in dichloromethane (12 ml) and methanol (20 ml), cooled to 0° C. The reaction mixture was stirred for 1.5 h, quenched with acetone (4 ml), and then poured into a saturated aqueous solution of ammonium chloride. The product was extracted into ethyl acetate; the combined organic phases were washed with brine, dried over sodium sulfate and concentrated under reduced pressure, to give (7α,17β)-7-ethyl-3-methoxyestra-1,3,5(10),14-tetraen-17-ol (4.28 g). The product was used in the following step without further purification.

Workup

customquenched with acetone (4 ml)
additionpoured into a saturated aqueous solution of ammonium chloride
extractionThe product was extracted into ethyl acetate
washthe combined organic phases were washed with brine
dry with materialdried over sodium sulfate
concentrationconcentrated under reduced pressure

Sources & evidence

ORD record: ord-c4aeeee2818b409382456ad27927a229
Source dataset: uspto-grants-2003_04
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06541465B2

Reaction notes

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