Water → 3-Phenoxy-alpha-ethynylbenzylalcohol

Beteiligte Stoffe

Reaktionsschritte

A mixture of 10.4 g of (1R, 5S) 6,6-dimethyl-4(R)-[(S)-ethynyl-(3'-phenoxy-phenyl)-methoxy]-3-oxabicyclo-(3,1,0)-hexan-2-one, 1 g of p-toluene sulfonic acid, 80 ml of water and 80 ml of dioxane was refluxed for 2 hours and was evaporated to dryness under reduced pressure. The residue was added to water and the mixture was stirred and was extracted with isopropyl ether. The organic phase was subjected to the usual treatment and was evaporated to dryness under reduced pressure. The 6 g of residue was chromatographed over silica gel and was eluted with a 7-3 benzeneethyl acetate mixture to obtain 5.1 g of (S) 1-(3-phenoxyphenyl)-prop-2-yn-1-ol with a specific rotation of [α]D20 =+10.5° (c=0.63% in benzene).

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