Imidazole → HCID 54415440, compound

HRID 440720Notes

Reaction equation

HRID 440720 reaction equation
[OH:1][CH2:2][CH2:3][O:4][C@H:5]1[CH2:22][CH2:21][C@@:20]2([CH3:23])[C:7](=[CH:8][CH2:9][C@@H:10]3[C@@H:19]2[CH2:18][CH2:17][C@@:15]2([CH3:16])[C@H:11]3[CH2:12][CH2:13][C:14]2=[O:24])[CH2:6]1.N1C=CN=C1.[Si:30](Cl)([C:33]([CH3:36])([CH3:35])[CH3:34])([CH3:32])[CH3:31].O>CN(C)C=O>[Si:30]([O:1][CH2:2][CH2:3][O:4][C@H:5]1[CH2:22][CH2:21][C@@:20]2([CH3:23])[C:7](=[CH:8][CH2:9][C@@H:10]3[C@@H:19]2[CH2:18][CH2:17][C@@:15]2([CH3:16])[C@H:11]3[CH2:12][CH2:13][C:14]2=[O:24])[CH2:6]1)([C:33]([CH3:36])([CH3:35])[CH3:34])([CH3:32])[CH3:31]

Participants

6

Reactant 4

HCID 795ImidazoleHCID 962WaterHCID 28928tert-Butyldimethylsilyl chlorideHCID 54305106HCID 54305106, compound

Product 1

HCID 54415440HCID 54415440, compoundYield 93%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of 2.0 g of 3β-(2-hydroxyethoxy)-androst-5-en-17-one (Julia S. et al., Bull. Soc. Chim. France, 1960, 297) in 20 ml of dimethylformamide, 3.5 g of imidazole and 4.0 g of t-butyldimethylsilyl chloride were added at 0° C. After 12 hrs the mixture was poured into water and extracted with ethyl acetate. The organic layer was dried over sodium sulfate and evaporated to dryness under reduced pressure to give 2.5 g of crude 3β-(2-tert-butyldimethylsilyloxyethoxy)-androst-5-en-17-one.

Workup

  1. extractionextracted with ethyl acetate
  2. dry with materialThe organic layer was dried over sodium sulfate
  3. customevaporated to dryness under reduced pressure

Sources & evidence

ORD record
ord-72f135842e694d25907ee2a0ef7fb402
Source dataset
uspto-grants-1996_05
Patent number
US05521167

Reaction notes

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