Water → HCID 15838157, compound

HRID 650329Notes

Reaction equation

HRID 650329 reaction equation
[OH:1][CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][C@@H:7]1[CH2:24][C:23]2[C@H:18]([CH2:19][CH2:20][C:21](=[O:25])[CH:22]=2)[C@@H:17]2[C@@H:8]1[C@H:9]1[C@@:13]([CH2:15][CH2:16]2)([CH3:14])[C:12](=[O:26])[CH2:11][CH2:10]1.[C:27](OC(=O)C)(=[O:29])[CH3:28].O>N1C=CC=CC=1.C(OCC)C>[C:27]([O:1][CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][C@@H:7]1[CH2:24][C:23]2[C@H:18]([CH2:19][CH2:20][C:21](=[O:25])[CH:22]=2)[C@@H:17]2[C@@H:8]1[C@H:9]1[C@@:13]([CH2:15][CH2:16]2)([CH3:14])[C:12](=[O:26])[CH2:11][CH2:10]1)(=[O:29])[CH3:28]

Participants

6

Reactant 3

HCID 962WaterHCID 7918Acetic AnhydrideHCID 158381567a-(5-Hydroxypentyl)-estr-4-ene-3,17-dione

Product 1

HCID 15838157HCID 15838157, compound

Reagents, catalysts & solvents 2

HCID 1049PyridineSolventHCID 3283Diethyl EtherSolvent

Conditions

Temperature
25 °C

Procedure

A solution of 94 g of crude 7a-(5-hydroxypentyl)-estr-4-ene-3,17-dione in 620 ml of pyridine is slowly mixed with 310 ml of acetic anhydride and stirred for 2 hours at 25° C. Then, it is slowly mixed with 116 mnl of water while being cooled with ice, diluted with 3 l of diethyl ether, the organic phase is dried and concentrated by evaporation after washing with sodium bicarbonate solution. The residue is chromatographed on silica gel, and 84.4 g of 7α-(5-acetoxypentyl)-estr-4-ene-3,17-dione is obtained as oil.

Workup

  1. temperaturewhile being cooled with ice
  2. customthe organic phase is dried
  3. concentrationconcentrated by evaporation
  4. washafter washing with sodium bicarbonate solution
  5. customThe residue is chromatographed on silica gel

Sources & evidence

ORD record
ord-643ebed33d884889868e18645457c839
Source dataset
uspto-grants-2001_08
Patent number
US06271403B1

Reaction notes

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