De Novo Protocol for the Construction of Benzo[<i>a</i>]fluorenes via Nitrile/Alkene Activation
作者:Babasaheb Sopan Gore、Chun-Hsien Chiang、Chein Chung Lee、Yi-Lun Shih、Jeh-Jeng Wang
DOI:10.1021/acs.orglett.0c02739
日期:2020.10.16
benzo[a]fluorenes were constructed from the reaction of (E)-2-aroyl-3-(2-(arylalkynes/alkenes)aryl)acrylonitrile scaffolds under metal-free conditions via the activation of nitriles and alkenes, respectively. A tentative reaction mechanism was proposed for this homofunctionalization of nitriles. Control experiments showed that the reaction proceeds via selective nitrile or alkene protonation, depending upon
由(E)-2-芳基-3-(2-(芳基炔烃/烯烃)芳基)丙烯腈支架在以下条件下反应,可实现前所未有的苯并[ a ]芴和萘酰胺取代的苯并[ a ]芴的化学和区域选择性合成。分别通过腈和烯烃的活化实现无金属条件。为腈的这种均官能化提出了一种初步的反应机理。对照实验表明,取决于底物,反应通过选择性腈或烯烃质子化而进行。此外,我们证明了在仅存在TfOH的情况下合成二取代苯并[ a ]芴的另一种快捷途径。