Photochemical reactivity of α-phenyl β,γ-enones. Singlet 1,3-acyl shift, triplet aromatic di-π-methane (DPM) rearrangement and triplet aryl-carbonyl bridging
作者:Margareth J. C. M. Koppes、Peter C. J. Beentjes、Hans Cerfontain
DOI:10.1002/recl.19881070404
日期:——
The photochemistry of the series of α-phenyl β,γ-enones 6–10 has been studied under conditions of both direct (λ 300 nm) and triplet-sensitized irradiation with the aim of determining the reactivity patterns of these “multi”-chromophoric systems.
Cobalt‐Catalyzed Wagner–Meerwein Rearrangements with Concomitant Nucleophilic Hydrofluorination
作者:Reece H. Hoogesteger、Nicola Murdoch、David B. Cordes、Craig P. Johnston
DOI:10.1002/anie.202308048
日期:2023.8.28
A cobalt-catalyzed reaction has been developed, which proceeds via hydrogen atom transfer and radical-polar crossover steps, to form a phenonium ion under non-acidic conditions. This cationic intermediate can be regioselectively fluorinated by a tetrafluoroborate anion to give 1,2-aryl migrated products. Evaluation of distinctly substituted phenonium ion intermediates demonstrated the constraints for
Hybrid Birch-Claisen Methodology for arylation at allylic termini: synthesis of (±)-herbertene
作者:S. Chandrasekaran、John V. Turner
DOI:10.1016/s0040-4039(00)87711-4
日期:1982.1
A hybrid Birch-Claisen methodology has been developed for the regio- and stereo-controlled arylation of allyl groups, and applied to a synthesis of (±)-herbertene.