Reaktion #64370

Reaktionsgleichung

(2S-trans)-2,3-bis[(benzyloxy)methyl]cyclobutanone

isobutylaluminum dichloride

→

dibenzyl ether

Lösungsmittel

toluene

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.WAITto stand at 0° C. overnight
2. 2
   SonstigeAfter dilution with ethyl acetate, the reaction mixture was quenched with 10% hydrochloric acid
3. 3
   WaschenThe organic phase was washed with brine
4. 4
   Trocknendried (magnesium sulfate)
5. 5
   Sonstigethe solvent evaporated

Vorschrift

A solution of (2S-trans)-2,3-bis[(benzyloxy)methyl]cyclobutanone (0.5 g., 1.61 mmole) in toluene (1 ml.) was added dropwise to a solution of isobutylaluminum dichloride (0.71M in hexane, 3.41 ml., 2.42 mmole) at -78° C. The mixture was allowed to warm slowly to room temperature over 2 hours. After stirring for 30 minutes at room temperature, the mixture was allowed to stand at 0° C. overnight. After dilution with ethyl acetate, the reaction mixture was quenched with 10% hydrochloric acid. The organic phase was washed with brine, dried (magnesium sulfate) and the solvent evaporated to give [1S-(1α,2β,3β)]-3-hydroxy-1,2-cyclobutanedimethanol, dibenzyl ether; TLC (50% ethyl acetate/hexane) Rf =0.53.

Quelle