On irradiation in benzene, (E)-5-(p-methoxyphenyl)-4-pentenyl 3-, 9-phenanthrenecarboxylate, 1-, and 2-naphthalenecarboxylate gave novel olefinic aldehydes presumably derived from oxetane precursors, the intramolecular carbonyl adducts. Intermolecular carbonyl addition was not detected between the corresponding ester and olefinic chromophores. Enhancement of reactivity of the ester carbonyl group in the linked systems is discussed on the basis of experimental and theoretical studies.
在
苯中辐照时,(E)-5-(对
甲氧基苯基)-4-
戊烯 3-、9-
菲羧酸酯、1-和 2-
萘羧酸酯产生了新的
烯烃醛,这些
烯烃醛可能来自
氧杂
环丁烷前体,即分子内羰基加合物。在相应的
酯和
烯烃发色团之间未检测到分子间羰基加成。在实验和理论研究的
基础上,讨论了
酯羰基在连接体系中反应活性的增强。