SINGLET-PHOTOSENSITIZED RING-SPLITTING AND ISOMERIZATION REACTIONS OF 1,2-DIPHENYLCYCLOBUTANE BY AROMATIC NITRILES. A POSSIBLE PROBE FOR RELATIONSHIPS BETWEEN REACTIVITIES AND ELECTRONIC NATURE OF EXCIPLEX INTERMEDIATES
作者:Chyongjin Pac、Takao Fukunaga、Tomohito Ohtsuki、Hiroshi Sakurai
DOI:10.1246/cl.1984.1847
日期:1984.10.5
The photosensitized reactions of cis-1,2-diphenylcyclobutane by 1,4-dicyanonaphthalene and 9,10-dicyanoanthracene gave styrene, the trans isomer, and 1-phenyltetralin whereas the photosensitization by 1-cyanonaphthalene effected the ring-splitting and cis,trans-isomerization reactions without the formation of 1-phenyltetralin. Similar reactions of the trans isomer were photosensitized by the aromatic
顺式 1,2-二苯基环丁烷与 1,4-二氰基萘和 9,10-二氰基蒽的光敏反应得到苯乙烯、反式异构体和 1-苯基四氢萘,而 1-氰基萘的光敏反应则产生环裂和顺,反-异构化反应而不形成 1-苯基四氢化萘。反式异构体的类似反应被芳香腈光敏化,但没有发生反式,顺式异构化。根据不同电荷转移和激发共振贡献的激基复合中间体讨论了反应的特征。