Benzyl Bromide → HCID 57269970, compound

HRID 863175Notes

Reaction equation

HRID 863175 reaction equation
[CH3:1][O:2][C@H:3]1[C:8]([CH3:10])([CH3:9])[CH2:7][CH2:6][C@@H:5]([C:11]([CH3:13])=[CH2:12])[C@@H:4]1[CH2:14][OH:15].[H-].[Na+].[CH2:18](Br)[C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1>CN(C)C=O.C(OCC)(=O)C>[CH3:1][O:2][C@H:3]1[C:8]([CH3:10])([CH3:9])[CH2:7][CH2:6][C@@H:5]([C:11]([CH3:13])=[CH2:12])[C@H:4]1[CH2:14][O:15][CH2:18][C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1

Participants

6

Reactant 3

HCID 7498Benzyl BromideHCID 24758Sodium hydrideHCID 54416206HCID 54416206, compound

Product 1

HCID 57269970HCID 57269970, compoundYield 83%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

A mixture of the above alcohol (621 g) and sodium hydride (141 mg, 60% dispersion in oil) and benzyl bromide (0.41 ml) in dry N,N-dimethylformamide (2.5 ml) was stirred for 10 hrs at room temperature. After the mixture was cooled to 0° C., the reaction was quenched by addition of water. The pH of the mixture was adjusted to pH 7 with 0.1N hydrochloric acid. The mixture was extracted with diethyl ether, and the combined organic layers were washed with brine, dried over anhydrous sodium sulfate, filtered, and concentrated. Purification of the residue by flash column chromatography (using n-hexane:ethyl acetate=20:1 as an eluent) gave benzyl [(1S,2R,6R)-2-methoxy-3,3-dimethyl-6-(1-methylvinyl)cyclohexyl]methyl ether (726 mg, 83% yield).

Workup

  1. temperatureAfter the mixture was cooled to 0° C.
  2. customthe reaction was quenched by addition of water
  3. extractionThe mixture was extracted with diethyl ether
  4. washthe combined organic layers were washed with brine
  5. dry with materialdried over anhydrous sodium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customPurification of the residue by flash column chromatography (

Sources & evidence

ORD record
ord-8f1c2b221e764dc897b6203415c44ee6
Source dataset
uspto-grants-1998_02
Patent number
US05719291

Reaction notes

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