苯甲酰氯 、 (2S,3aR,5R,6S,7S,7aR)-7-Hydroxy-5-hydroxymethyl-2-methyl-6-((2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6-hydroxymethyl-tetrahydro-pyran-2-yloxy)-tetrahydro-[1,3]dioxolo[4,5-b]pyran-2-carbonitrile 在
吡啶 作用下,
以82%的产率得到3,6-di-O-benzoyl-4-O-(2,3,4,6-tetra-O-benzoyl-β-D-galactopyranosyl)-1,2-O-<1-(exo-cyano)ethylidene>-α-D-glucopyranose