Lipases and proteases from different sources were screened for their ability to catalyze the transesterification of glucose and activated N-blocked phenylalanine. A commercial protease from Bacillus licheniformis was found to be most effective for this purpose. On a basis of C-NMR analysis, glucose was acylated at the C-6 position. The enzyme showed a broad substrate specificity toward various monosaccharides.