Reductive Activation and Hydrofunctionalization of Olefins by Multiphoton Tandem Photoredox Catalysis
作者:Milena L. Czyz、Mitchell S. Taylor、Tyra H. Horngren、Anastasios Polyzos
DOI:10.1021/acscatal.1c01000
日期:2021.5.7
of olefin feedstocks to architecturally complex alkanes represents an important strategy in the expedient generation of valuable molecules for the chemical and life sciences. Synthetic approaches are reliant on the electrophilicactivation of unactivated olefins, necessitating functionalization with nucleophiles. However, the reductive functionalization of unactivated and less activatedolefins with
Pd-catalyzed oxidative cross-coupling of N-tosylhydrazones with arylboronic acids
作者:Xia Zhao、Jing Jing、Kui Lu、Yan Zhang、Jianbo Wang
DOI:10.1039/b925590g
日期:——
The Pd-catalyzed reaction of N-tosylhydrazones and arylboronic acids provides olefin derivatives. This oxidative cross-coupling is suggested to proceed through a migratory insertion process of a Pd carbene intermediate.
Selectivity relationships and substituent-substituent interactions in carbocation-forming bromination. The transition-state contribution to the .rho. variation
Determination des facteurs provoquant une variation de ρ. Une distinction est faite entre l'influence de la position de l'etat de transition et celle de la contribution thermodynamique a la reactivite
Determination des facteurs provoquant une 变异 de ρ。区别 est faite entre l'influence de la position de l'etat de transition et celle de latribution thermodynamique a la reactive
Electrooxidative 1,2-Bromoesterification of Alkenes with Acids and <i>N</i>-Bromosuccinimide
作者:Chao Wan、Ren-Jie Song、Jin-Heng Li
DOI:10.1021/acs.orglett.9b00771
日期:2019.4.19
A simple three-component 1,2-bromoesterification of alkenes with acids and N-bromosuccinimide under electrochemical oxidative conditions is described. This transformation enables the construction of β-bromoalkyl esters via oxidative C–Br/C–O difunctionalization, where a variety of alkenes, including styrenes and cycloolefins, were well tolerated to react efficiently with a wide range of acids, such
Halogenation of 1,1-diarylethylenes by N-halosuccinimides
作者:Ge Zhang、Rui-Xue Bai、Chu-Han Li、Chen-Guo Feng、Guo-Qiang Lin
DOI:10.1016/j.tet.2018.11.018
日期:2019.3
An efficient method for the preparation of 2,2-diarylvinyl halides from the corresponding 1,1-diarylethylenes has been developed. N-Halosuccinimides (N-bromosuccinimide or N-chlorosuccinimide) were used as the halogenation reagents. The practicability of this method is highlighted by its simple operation, broad substrate scope and capability for large-scale reaction.