New syntheses of carbocycles from carbohydrates. Cyclization of radicals derived from unsaturated halo sugars

Cyclisation de bromo-7 O-isopropylidene-4,5 tridesoxy-2,3,7 heptene-2onate d'ethyle en hydroxy-6 dimethyl-2,2 perhydro cyclopenta [d] dioxole-1,3acetate-4 d'ethyle