An efficient dehydrogenativeDiels–Alder (DHDA) reaction of prenylderivatives with 2,3‐dichloro‐5,6‐dicyanobenzoquinone (DDQ) has been developed under mild conditions, leading to a series of cyclohexene derivatives with good to excellent yields and excellent diastereoselectivity.
Basic elimination of sulfonium salts. Neighbouring group influence on regioselectivity.
作者:B. Badet、M. Julia、J.M. Mallet、C. Schmitz
DOI:10.1016/s0040-4039(00)88333-1
日期:1983.1
A simple preparation of sulfonium salts functionalized by oxygenated groups is reported. The nature and the position of the latter control the regiochemistry of elimination of the sulfonium moiety leading to selective formation of Saytsev or Hofmann olefins.
Role of Distance in Singlet Oxygen Applications: A Model System
作者:Matthias Klaper、Werner Fudickar、Torsten Linker
DOI:10.1021/jacs.6b01555
日期:2016.6.8
Herein, we present a model system that allows the investigation of a directed intramolecular singletoxygen ((1)O2) transfer. Furthermore, we show the influence of singletoxygen lifetime and diffusion coefficient (D) on the preference of the intramolecular reaction over the intermolecular one in competition experiments. Finally, we demonstrate the distance dependence in quenching experiments, which
Dual Transition Metal Electrocatalysis: Direct Decarboxylative Alkenylation of Aliphatic Carboxylic Acids
作者:Jiaqing Lu、Yan Yao、Liubo Li、Niankai Fu
DOI:10.1021/jacs.3c08839
日期:2023.12.13
the reaction. This new alkenylation protocol has been successfully demonstrated in direct modification of naturally occurring complex acids and is amenable to the enantioselective decarboxylative alkenylation of arylacetic acid. Mechanistic studies, including a series of controlled experiments and cyclic voltammetry data, allow us to probe the key intermediates and the pathway of the reaction.