Reaktion #2701

Reaktionsgleichung

dry-ice

t-BuLi

pentane

1-(tol-4-yl)3,4-dihydro-4,4-dimethyl-7-bromo-naphthalene

Compound B

1-(tol-4-yl)3,4-dihydro-4,4-dimethyl-7-bromo-naphthalene

dimethylformamide

→

title compound

1-(Tol-4-yl)3,4-dihydro-4,4-dimethyl-7-naphthaldehyde

Lösungsmittel

ethylacetate

THF

Reaktionsbedingungen

Aufarbeitung

1. 1
   Waschenwashed with water (15 mL)
2. 2
   TrocknenThe organic layer was dried with MgSO4 and solvent
3. 3
   Sonstigewas removed under reduced pressure
4. 4
   SonstigeThe crude material was purified by silicagel chromatography

Vorschrift

To a cold (-78° C.), stirred solution of 1-(tol-4-yl)3,4-dihydro-4,4-dimethyl-7-bromo-naphthalene (Compound B 1 g, 3.2 mmol), in THF (17 mL) was added t-BuLi in pentane (1.7M solution, 3 mL, 5.1 mmol). After 10 minutes dry dimethylformamide (DMF) (600 mg, 8 mmol) was added and the dry-ice cooling was replaced with ice-water bath. The mixture was gradually warmed to ambient temperature and diluted with ethylacetate (150 mL), washed with water (15 mL). The organic layer was dried with MgSO4 and solvent was removed under reduced pressure. The crude material was purified by silicagel chromatography to afford the title compound as a white solid.

Quelle