Acetic acid (2S,3R,4S,5R,6R)-4,5-diacetoxy-6-acetoxymethyl-2-[3-(3,4-dihydro-2H-benzo[b][1,4]dioxepin-7-yl)-4-oxo-4H-chromen-7-yloxy]-tetrahydro-pyran-3-yl ester 在
sodium methylate 作用下,
以
甲醇 为溶剂,
反应 0.03h,
以79.5%的产率得到3-(3,4-Dihydro-2H-benzo[b][1,4]dioxepin-7-yl)-7-((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-hydroxymethyl-tetrahydro-pyran-2-yloxy)-chromen-4-one