Organic Photochemical Reactions. XXXI. Photosensitized Ring-Cleavage Reactions of 2,2-Diaryloxetanes by Aromatic Nitriles
作者:Kenichi Nakabayashi、Jun-ichi Kojima、Kimiko Tanabe、Masahide Yasuda、Kensuke Shima
DOI:10.1246/bcsj.62.96
日期:1989.1
ability of the oxetane. The limiting quantum yields in the case of 1,4-dicyanonaphthalene-photosensitized reaction of 2,2-di-p-tolyl- or 2,2-bis(p-mechoxyphenyl)-3,3,4-uimethyloxetane exceed unity. The mechanism is discussed in terms of electron transfer from oxetanes to the excited singlet state of the sensitizer as well as the regeneration process of the oxetane cation radical involving the hole transfer
已经研究了 2,2-二芳基氧杂环丁烷与 1,4-二氰基萘、1-氰基萘和 9,10-二氰基蒽的光敏反应,这些反应产生了取代的二苯甲酮和烯烃等开环产物。环裂解的量子产率随芳基和氧杂环丁烷环上的取代基而变化。量子产率随着氧杂环丁烷的给电子能力的增加而增加。在 2,2-二-对-甲苯基-或 2,2-双(对-甲氧基苯基)-3,3,4-甲基氧杂环丁烷的 1,4-二氰基萘光敏反应的情况下,极限量子产率超过了 1。