Methyl 4-(2-formyl-4-hydroxyanilino)-4-oxobut-2-enoate 、 (4'aS,6'aR,6'bR,12'aR)-6'a-[(2-diethoxyphosphorylacetyl)oxymethyl]-2',2',6'b,9',9',12'a-hexamethylspiro[1,3-dioxolane-2,10'-3,4,5,6,6a,7,8,8a,11,12,13,14b-dodecahydro-1H-picene]-4'a-carboxylic acid 在
lithium hydroxide 作用下,
以
DMF (N,N-dimethyl-formamide) 、
水 为溶剂,
反应 3.5h,
生成 (4'aS,6'aR,6'bR,12'aR)-6'a-[3-[2-(3-carboxyprop-2-enoylamino)-5-hydroxyphenyl]prop-2-enoyloxymethyl]-2',2',6'b,9',9',12'a-hexamethylspiro[1,3-dioxolane-2,10'-3,4,5,6,6a,7,8,8a,11,12,13,14b-dodecahydro-1H-picene]-4'a-carboxylic acid