乙酸酐 、
1,6-anhydro-2-O-<2,4,6-tri-O-acetyl-3-O-(acetylcarbamoyl)-α-D-mannopyranosyl>-β-L-gulopyranose 在
吡啶 作用下,
反应 24.0h,
以95%的产率得到Acetic acid (1R,2S,3R,4R,5R)-2-acetoxy-4-((2R,3S,4S,5R,6R)-3,5-diacetoxy-6-acetoxymethyl-4-acetylcarbamoyloxy-tetrahydro-pyran-2-yloxy)-6,8-dioxa-bicyclo[3.2.1]oct-3-yl ester