作者:Kazuhiko Mizuno、Hajime Maeda、Hikaru Sugita、Shogo Nishioka、Takayoshi Hirai、Akira Sugimoto
DOI:10.1021/ol000379u
日期:2001.2.1
(2a--d) afforded rearranged products 1,2,3-butatrienes (3a-d) in good to high yields. Photorearrangement from 2,2,3-trimethyl and 2,2- and 2,3-dimethyl derivatives 2e--g also proceeded, but the rates of the rearrangement were lower than those of 2a--d. A singlet mechanism is proposed for this photorearrangement, where alkyl migration occurs from 1,3-biradical intermediates generated via the homolysis
[反应:见正文]含有1-二芳基亚乙烯基-2,2,3,3-四甲基环丙烷(2a-d)的苯溶液的光辐照可提供高产率,高产率的重排产物1,2,3-丁烯(3a-d)。 。也进行了由2,2,3-三甲基以及2,2-和2,3-二甲基衍生物2e-g的光重排,但是重排的速率低于2a-d。提出了用于这种光重排的单线态机理,其中烷基迁移从经由C1-C2键的均质化产生的1,3-双自由基中间体发生。从1,3-双基生成二芳基亚乙烯基卡宾可能与3的形成竞争。