Abstract
| - Perchloric acid supported on silica gel acts asan excellent reagent system in converting glucals into 2,3-unsaturated-O-glucosides in good to excellent yields in shortreaction time with good α selectivity. Primary, secondary,and allylic alcohols, phenols, and thiols react with 3,4,6-tri-O-acetyl glucal with equal ease. In addition to this, a chiralfuran diol is obtained from unprotected d-glucal or d-galactalin good yields.
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