3,6-di-O-acetyl-1,2-O-[(S)-1-(cyano)ethylidene]-4-O-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-α-D-glucopyranose 在
sodium methylate 作用下,
以
甲醇 为溶剂,
反应 1.0h,
以2 g的产率得到(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