Reaction of phenyl-substituted allyllithiums with tert-alkyl bromides. Remarkable difference in the alkylation regiochemistry between a polar process and the one involving single-electron transfer
Un chemin reactionnel polaire favorise l'attaque au niveau du site phenyl substitue (C-1) tandis qu'un couplage au niveau de l'autre site (C-3) se produit de facon predominante dans le cas d'un mecanisme SET
Un chemin reactnel polaire favourise l'attaque au niveau du site phenyl substitue (C-1) tandis qu'un couplage au niveau de l'autre site (C-3) se produit de facon predominante dans le cas d'un mecanisme SET
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.
building on reductive coupling is a powerful method for the preparation of organic compounds. The identification of environmentally benign reductants is key for establishing an efficientreductive coupling reaction. Herein an efficient strategy enabling H2 as the sole reductant for the palladium-catalyzed allyl–allyl reductive coupling reaction is described. A wide range of allylamines and allylic alcohols