Rigid face-to-face [3.3]-oo′-cyclophanes arene/alkene and arene/arene photocycloaddition reactions
作者:Regina Thiergardt、Manfred Keller、Markus Wollenweber、Horst Prinzbach
DOI:10.1016/s0040-4039(00)79165-9
日期:1993.5
Proximity as origin of unusual photoreactivity is being explored: In the naphtho/ene 5 (X-ray analysis), direct or sensitized photoexcitation induce an efficient meta-addition to the naphthalene nucleus; ortho-(2,3)-addition is not enforced. Naphtho/benzo cyclophane 10, however, is photochemically “inert”. Structurally related benzo/enes 4 and 17 undergo photoequilibration (2:1) with the respective
人们正在探索将近邻作为异常光反应性的起源:在萘/烯5(X射线分析)中,直接或敏化的光激发会引起萘核的有效间加。邻域-(2,3)-加法未强制执行。然而,萘酚/苯并环烷10是光化学上“惰性的”。与结构相关的苯并/烯4和17与各自的[6 + 2]-环加合物进行光平衡(2:1)。