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

1: t-BuOK / tetrahydrofuran / 0.25 h / 0 °C 2: aq. AD-mix β, CH3SO2NH2 / 2-methyl-propan-2-ol / 0 °C View Scheme

1: aq. NaNO2, H2SO4 2: aq. HCl View Scheme

hydrogenchloride

T=30°C; 288 h; microbial hydrolysis;