nucleophile. Therefore, aromatic olefins are suitable substrates in photo-NOCAS reactions when TCNB is used as the electron acceptor. In addition, these results show that the enol of beta-dicarbonyl compound serves as a carbon nucleophile to trap the alkene cation radical in PET reactions to lead to C-C bond formation.
四
氰基苯(TCNB),芳族烯烃和β-二羰基化合物之间的光诱导三组分反应通过正式消除
氰化氢提供了由这三种组分组成的产物,从而导致烯烃的邻二烷基化和二烯烃的α-烷基化β-二羰基化合物。结果表明,这些反应是通过从烯烃到单重激发的TCNB的光诱导电子转移(PET)引发的,并通过亲核-烯烃结合,芳族取代(NOCAS)反应序列(以烯化的β-二羰基化合物为亲核体)进行。因此,当将TCNB用作电子受体时,芳族烯烃是光NOCAS反应中的合适底物。此外,