Reactions of 7,9-dimethyl-, 7,9-diethyl-, and 7,9-di-n-propyl-8H-cyclopenta[a]acenaphthylen-8-oneswith dimethyl 1-cyclobutene-l,2-dicarboxylate afforded the corresponding decarbonylated 1:1 adducts, while a similar addition of 7,9-diisopropyl-8H-cyclopenta[a]acenaphthylen-8-one onto the cyclobutene gave a 1:1 adduct. The photoaromatization and valence tautomerization of these adducts were examined.
7,9-二甲基-、7,9-
二乙基-和7,9-二正丙基-8H-环五[a]
苊-8-酮与
1-环丁烯-1,2-二甲酸二甲酯的反应得到相应的脱羰基1:1加合物,而类似地将7,9-
二异丙基-8H-环五[a]
苊-8-酮加成到
环丁烯上得到1:1加合物。检查了这些加合物的光芳构化和化合价互变异构化。