反应详情

温度

-65 °C

404 ml of a toluene solution of 1.2 moles of diisobutyl aluminum hydride were slowly added at -70° C. to a solution of 60 g of the product of Step A in 720 ml of toluene and the mixture was stirred at -65° C. for 16 minutes and slowly poured into an aqueous solution of sodium potassium tartrate. The mixture was stirred and allowed to stand and the decanted aqueous phase was extracted with ether. The combined organic phases were evaporated to dryness and the residue was taken up in methylene chloride. The solution was evaporated to dryness under reduced pressure to obtain 56.7 g of (1R,2S,5S) 6,6-dimethyl-3-oxa-bicyclo(3,1,0)hexane-2-ol with a boiling point of ≃50° C. at 0.5 mm Hg and a specific rotation of [α]D20 =+66.5° (c=1% in ethanol).

1. stirringThe mixture was stirred
2. extractionthe decanted aqueous phase was extracted with ether
3. customThe combined organic phases were evaporated to dryness
4. customThe solution was evaporated to dryness under reduced pressure