7-methyl-1-(4-tolyl)-1,2,3,4-tetrahydronaphthalene (5) and 6-methyl-4-(4-tolyl)-1,2,3,4-tetrahydronaphthalen-1-one (6) were also afforded. The formation of these products is reasonably explained by electron transfer in the excited CCT pair followed by addition of the resulting 1 cation radical to ground-state 1 to form a dimer cation radical; its cyclization leads to the dimeric products and trapping
用
乙腈和苯中的分子氧照射
4-甲氧基苯乙烯 (1a) 和 4-
甲基苯乙烯 (1b) 的接触电荷转移 (CCT) 带 (320–370 nm) 导致形成相应的顺式和反式 1, 2-二芳基
环丁烷(2 和 3)以及
苯甲醛(4),氧化裂解产物。在1b的情况下,7-甲基-1-(4-
甲苯基)-
1,2,3,4-四氢萘(5)和6-甲基-4-(4-
甲苯基)-1,2,3,4还提供了-四氢
萘-1-一(6)。这些产物的形成可以通过激发 CCT 对中的电子转移来合理解释,然后将所得的 1 阳离子自由基添加到基态 1 以形成二聚阳离子自由基;它的环化产生二聚体产物,氧捕获环状二聚体阳离子自由基得到酮 6。