Biotransformations in carbohydrates synthesis. N-Acetylgalactosaminyl transfer on to methyl N-acetyl-β-D-glucosaminide (methyl 2-acetamido-2-deoxy-β-D-glucopyranoside) and methyl N-acetyl-α-D-glucosaminide (methyl 2-acetamido-2-deoxy-α-D-glucopyranoside) catalysed by a β-N-acetylgalactosaminidase from Aspergillus oryzae

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Abstract
Using a crude N-acetylgalactosaminidas from Aspergillus oryzae, the β-N-acetylgalactosaminyl moiety of p-nitrophenyl N-acetylgalactosaminide was transferred to the C-4 and C-6 hydroxy groups of methyl N-acetyl-β-D-glucosaminide and methyl N-acetyl-α-D-glucosaminide and, for the latter, with high efficiency and selectivity for transfer to the C-4 position.