Oxetanes, carbohydrate, preparation

Carbohydrate oxetanes have been prepared from deoxyiodo sugars without die use of strongly alkaline reagents. Thus, treatment of 5-deoxy-5-iodo-l,2-0-isopropylidene-a-D-xylofuranose with silver fluoride in cold pyridine afforded 3,5-anhydro-l,2-0-isopropylidene-... 

A new set of carbohydrate-based thermotropic liquid crystals (17) have been prepared via reaction of the oxetan (18)(derived from glucose) with lithium acetylide reagents followed by catalytic hydrogenation. A related series of 2,5-anhydro-hexitol derivatives (19) have been prepared by a similar route, reacting the oxetan with long-chain alcohols in presence of trifluoroacetic... 

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