5-(1,8-Dimethoxy-3-methoxycarbonylmethyl-9,10-dioxo-9,10-dihydro-anthracen-2-yl)-3,5-dioxo-pentanoic acid methyl ester 在
potassium carbonate 作用下,
以
甲醇 为溶剂,
反应 3.0h,
以30%的产率得到4,5-Dihydroxy-7-methoxy-2-methoxycarbonylmethyl-6,11-dioxo-6,11-dihydro-naphthacene-1-carboxylic acid methyl ester