On the preparative use of recombinant β(1–3)galactosyl-transferase

A number of non-natural N-acyl derivatives of glucosamine is incubated with a recombinant β(1–3) galactosyl-transferase and UDP-galactose. Surprisingly, the enzyme recognizes the non-natural acceptors as substrates and transfers galactose onto the 3-OH group in a β-mode to give a series of Lewisc-(type 1) disaccharides.