Alkene Isomerisation Catalysed by a Ruthenium PNN Pincer Complex
作者:Sébastien Perdriau、Mu-Chieh Chang、Edwin Otten、Hero J. Heeres、Johannes G. de Vries
DOI:10.1002/chem.201403236
日期:2014.11.17
rearomatised alkoxide complex. In this complex, the hemilabile diethylamino side‐arm can dissociate, allowing alkene binding cis to the hydride, enabling insertion of the alkene into the metal–hydride bond, whereas in the parent complex only trans binding is possible. During this study, a new uncommon Ru0 coordination complex was also characterised. The scope of the alkene isomerisation reaction was examined
作者:Samantha A. Green、Jeishla L. M. Matos、Akiko Yagi、Ryan A. Shenvi
DOI:10.1021/jacs.6b08507
日期:2016.10.5
A combination of cobalt and nickel catalytic cycles enables a highly branch-selective (Markovnikov) olefin hydroarylation. Radical cyclization and ring scission experiments are consistent with hydrogenatomtransfer (HAT) generation of a carbon-centered radical that leads to engagement of a nickel cycle.
Preparation of 1-Alkenes by the Palladium-Catalyzed Hydrogenolysis of Terminal Allylic Carbonates and Acetates with Formic Acid-Triethylamine
作者:Jiro Tsuji、Ichiro Minami、Isao Shimizu
DOI:10.1055/s-1986-31723
日期:——
A useful method for the preparations of 1-alkenes from terminal allylic carbonates and acetates by the palladium-catalyzed reaction with formates is described. Formic acid-triethylamine is a suitable reductant. As catalyst, Pd2(dba)3CHCl3-P(n-Bu)3, gave the best results. 0.05 0.2mol% being sufficient (turnover 500 2000). Using this method, various 1-alkenes were prepared in good yields with high selectivity.
REGIOSELECTIVE SYNTHESIS OF 1-OLEFINS BY PALLADIUM-CATALYZED HYDROGENOLYSIS OF TERMINAL ALLYLIC COMPOUNDS WITH AMMONIUM FORMATE
作者:Jiro Tsuji、Isao Shimizu、Ichiro Minami
DOI:10.1246/cl.1984.1017
日期:1984.6.5
Various terminal allylic compounds such as allylic esters, phenyl ethers, carbonates, chlorides, and vinyl epoxides react with ammonium or sodium formate to give 1-olefins with high regioselectivity by using palladium–tributylphosphine complex as a catalyst. The reaction offers a useful synthetic method for 1-olefins.
Synthesis and Properties of (<b><i>η</i></b><sup>3</sup>-1-Methylallyl)palladium(II) Formates as Models of Intermediates in the Palladium-Catalyzed Reductive Cleavage of Allylic Carboxylates and Carbonates with Formic Acid
In order to gain insight into the mechanism of the regioselective formation of alkenes in the palladium-catalyzed reductive cleavage of allylic carboxylates or carbonates with formic acid, two types of (η3-1-methylallyl)palladium formates (P1 and P2 types) have been prepared as simple models of catalytic intermediates. The P1 type is a neutral complex coordinated with one tertiary phosphine ligand