Methyl 6-ethyl-4-oxooct-2-enoate 、
3-(3,4-dimethoxyphenyl)-4,5,6-trimethoxy-1(3H)-isobenzofuranone 在
Methyl 6-ethyl-4-oxooct-2-enoate 作用下,
以68的产率得到methyl (1S,2R)-1-(3,4-dimethoxyphenyl)-3-(3-ethylpentanoyl)-1,4-dihydroxy-6,7,8-trimethoxy-2H-naphthalene-2-carboxylate