(4Z,9Z)-6-((2R,4R,5S,6R)-4,5-Bis-methoxymethoxy-6-methoxymethoxymethyl-tetrahydro-pyran-2-yl)-5,7,9-trihydroxy-3,11-dioxo-trideca-4,9-dienedioic acid dimethyl ester 在
calcium acetate 作用下,
以
甲醇 为溶剂,
反应 2.5h,
生成
7-((2R,4R,5S,6R)-4,5-Bis-methoxymethoxy-6-methoxymethoxymethyl-tetrahydro-pyran-2-yl)-1,8-dihydroxy-3-methoxycarbonylmethyl-naphthalene-2-carboxylic acid methyl ester