8,9-dichloro-6-(3-phenylprop-2(E)-enylidene)-1,4-dioxaspiro[4.4]non-8-en-7-one 在
甲醇 、
sodium methylate 作用下,
以
四氢呋喃 为溶剂,
生成 4-chloro-5-hydroxy-2(Z)-(3-phenylprop-2(E)-en-1-ylidene)cyclopent-4-en-1,3-dione 、
4-chloro-5-hydroxy-2(E)-(3-phenylprop-2(E)-en-1-ylidene)cyclopent-4-en-1,3-dione