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Preparation of poly(4‐vinyl‐2‐hydroxypyridine) and its catalytic activity on mutarotation of 2,3,4,6‐tetramethyl‐α‐D‐glucose

Poly(4-vinyl-2-hydroxypyridine),(PVHP) was prepared by the reaction of poly (4-vinylpyridine) with hydrogen peroxide in acetic acid, and subsequent refluxing in acetic anhydride at 150 o C. The PVHP was found to show higher catalytic activity in the mutarotation of 2,3,4,6-tetramethyl-α-D-glucose (TMG) in chloroform and in ethanol than 2-hydroxypyridine, which was deduced to be due to more efficient formation of the complex between TMG and the catalyst molecules. The mutation rates were higher in CHCl 3 than in ethanol and increased proportionnally with increasing concentration of the substrate, while they increased but not proportionnally with increasing concentration of the catalyst