Reaktion #6607

Reaktionsgleichung

sodium sulfate

diisobutylaluminum hydride

4-cyanobenzyl 5,6,7,8-tetrahydro-5,5,8,8-tetramethyl-2-naphthyl ether

tartaric acid

→

title compound

4-Formylbenzyl 5,6,7,8-tetrahydro-5,5,8,8-tetramethyl-2-naphthyl ether

Lösungsmittel

ether

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigethe phases were separated
2. 2
   ExtraktionThe aqueous phase was extracted with ether
3. 3
   Extraktionthe organic extract
4. 4
   Waschenwas washed with saturated tartaric acid solution and water
5. 5
   Trocknendried over Na2SO4
6. 6
   Einengenconcentrated
7. 7
   SonstigeRecrystallization from reethanol

Vorschrift

15.5 ml (19.7 mmol) of diisobutylaluminum hydride solution (20% in hexane) were added dropwise under nitrogen to a solution of 3 g (9.4 mmol) of 4-cyanobenzyl 5,6,7,8-tetrahydro-5,5,8,8-tetramethyl-2-naphthyl ether in 40 ml of dry ether at 25° C. The mixture was stirred at 25° C. for 40 min and then 250 ml of saturated tartaric acid solution were added dropwise. Subsequently, a little sodium sulfate solution was added, and the phases were separated. The aqueous phase was extracted with ether, and the organic extract was washed with saturated tartaric acid solution and water, dried over Na2SO4 and concentrated. Recrystallization from reethanol resulted in 1.4 g of the title compound of melting point 102°-104° C.

Quelle