作者:Chiara Pedroli、Davide Ravelli、Stefano Protti、Angelo Albini、Maurizio Fagnoni
DOI:10.1021/acs.joc.7b00610
日期:2017.7.7
respectively, in the formation of triplet α,2- and α,4-DHTs, whose diradical reactivity led to both radical and polar products. On the other hand, irradiation of the meta-precursor led to the singlet α,3-DHT isomer. The latter showed a marked preference for the formation of polar products and this was rationalized, as supported by computational evidence, via the involvement of a zwitterionic species arising through
α,n的反应性质子介质(有机/水混合物)中的β-二氢甲苯(DHTs)是通过计算和实验相结合的方法进行研究的。这些中间体是通过在(氯苄基)三甲基硅烷中发生的光诱导双消除过程生成的,并导致形成不同的产物分布,具体取决于测试的异构体。邻位和对位衍生物的辐射分别导致三重态α,2-和α,4-DHTs的形成,其双自由基反应性同时导致自由基和极性产物。另一方面,间亚前体的辐射导致单重态α,3-DHT异构体。后者对极性产物的形成表现出明显的偏爱,并且得到了计算证据的支持,这是合理的,