When the pentaacetate anomer obtained in this reaction is heated with zncl2 and acetic anhydride?

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When the pentaacetate anomer is heated with ZnCl2 and acetic anhydride, it is converted into the other anomer. Explain why it occurs.

If so, then the answer would be:

Glucose Pentaacetate is prepared through the acetylation of glucose with acetic anhydride.

Alpha-anomer is produced when acidic catalyst is present like zinc chloride. On the other hand, beta-anomer is formed when a basic catalyst is present, like sodium acetate.