Photolysis of5-bromo-1, 3-dimethyluracil (5-BDMU) in substituted benzenes afforded the corresponding 5-aryl derivatives together with the unexpected 6-isomers as an isomeric mixture. The 6-isomers were found to be derived from the protonated 5-BDMU, presumably via the interaction between LUMO5-BDMU (in the excited triplet state) and LUMOaryl (in the ground state).
光解取代苯中的 5-
溴-1, 3-二甲基尿
嘧啶(5-B
DMU)可得到相应的 5-芳基衍
生物以及意想不到的 6-异构体异构体混合物。研究发现,6-异构体来自质子化的 5-B
DMU,可能是通过 LUMO5-B
DMU(激发三重态)和 LUMOaryl(基态)之间的相互作用产生的。