Traceless directing group mediated branched selective alkenylation of unbiased arenes
作者:Soumitra Agasti、Aniruddha Dey、Debabrata Maiti
DOI:10.1039/c6cc07032a
日期:——
–COOH group assisted branched selective olefination of simple arenes.
–COOH基团辅助简单芳烃的分支选择性烯基化。
Branched Arylalkenes from Cinnamates: Selectivity Inversion in Heck Reactions by Carboxylates as Deciduous Directing Groups
作者:Jie Tang、Dagmar Hackenberger、Lukas J. Goossen
DOI:10.1002/anie.201605744
日期:2016.9.5
A decarboxylative Mizoroki–Heck coupling of aryl halides with cinnamic acids has been developed in which the carboxylate group directs the arylation into its β‐position before being tracelessly removed through protodecarboxylation. In the presence of a copper/palladium catalyst, both electron‐rich and electron‐deficient arylbromides and chlorides bearing numerous functionalities were successfully
N-heterocyclic iminium ions catalyzed Friedel–Crafts type alkenylation of arenes with alkynes: A metal free and solvent free approach
作者:Preethi Raja、Tapas Ghatak
DOI:10.1016/j.catcom.2023.106753
日期:2023.9
without the use of any metal catalysts. The aforementioned process is expedited through the implementation of 2-amino-perimidinium bromide and TFA as catalyst systems and is executed in the absence of solvents, thereby expanding the range of substrates (including arenes and alkynes). The correlation between the stoichiometric reactions and experimental data substantiates the postulated reaction mechanism
A Ligand Free and Room Temperature Protocol for Pd-Catalyzed Kumada−Corriu Couplings of Unactivated Alkenyl Phosphates
作者:Delphine Gauthier、Stephan Beckendorf、Thomas M. Gøgsig、Anders T. Lindhardt、Troels Skrydstrup
DOI:10.1021/jo900098a
日期:2009.5.1
Kumada-Corriu cross-couplings of nonactivated cyclic and acyclic vinyl phosphates with aryl magnesium reagents afforded a series of 1,1-disubtituted alkenes in good yields for most cases when the reactions were performed at room temperature with the simple palladium salt, PdCl2, without the presence of phosphine ligands.
Shurakowski, Zhurnal Russkago Fiziko-Khimicheskago Obshchestva, 1909, vol. 41, p. 1687