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。