2-methoxy-3-(2,3,4,6-tetra-O-acetyl-β-D-mannopyranosyl-1-thio)-1,4-naphthoquinone 在
sodium methylate 作用下,
以
甲醇 为溶剂,
反应 0.5h,
以76%的产率得到(2R,3S,4S,4aS,12aS)-2-hydroxymethyl-3,4-dihydroxy-3,4,4a,12a-tetrahydro-2H-naphtho[2,3-b]pyrano[2,3-e][1,4]-oxathiine-6,11-dione