potassium 9-O-(1,2:5,6-di-O-isopropylidene-α-D-glucofuranosyl)-9-boratabicyclolt;3.3.1gt;nonane in tetrahydrofuran T=-78°C; 8 h; Yield given. Yields of byproduct given. Title compound not separated from byproducts;

hydrazine hydrate NaOH, pH= 10;

sulfuric acid T=60 - 70°C;

K-10 lipase T=25°C; 30 h; 0.2M phosphate buffer, pH 6.9;