Pseudomonas fluorescens lipase (Amano) was found to be highly regioselective in the transesterification of 1, 6-anhydro-β-D-manno and galactopyranoses (mannosane and galactosane respectively) using vinyl acetate as an acyl donor. As in the case of 1, 6- anhydro-β-D-glucopyranose (glucosane), the 4-OH axial group of mannosane is preferred, while the titled lipase catalysed the regioselective transesterification at the 2-axial OH of ...