Dalton communications. Carbonylation of organic halides catalysed by rhodium triethylphosphine complexes
作者:Michael C. Simpson、Marc J. Payne、David J . Cole-Hamilton
DOI:10.1039/dt9940002899
日期:——
Allyl and benzyl halides but not phenyl or propyl halides have been carbonylated in ethanol in the presence of rhodium triethylphosphine complexes to their respective butenoic or benzylic esters; no added base was required.
Synthesis of Short-Chain Alkenyl Ethers from Primary and Bio-sourced Alcohols via the Nickel-Catalyzed Hydroalkoxylation Reaction of Butadiene and Derivatives
Hydroalkoxylation of butadiene has been performed in the presence of nickel precatalysts associated with chelating diphosphine ligands. High butadiene conversions and selectivities forming alkyl butenyl ethers were obtained with low catalyst loading. Reactions were performed with a wide scope of primary alcohols including benzylic alcohol derivatives and bio‐sourced alcohols. In the same way, the scope
Nickel-Catalysed Hydroalkoxylation Reaction of 1,3-Butadiene: Ligand Controlled Selectivity for the Efficient and Atom-Economical Synthesis of Alkylbutenyl Ethers
作者:Sandra Bigot、Mohammed Samir Ibn El Alami、Alexis Mifleur、Yves Castanet、Isabelle Suisse、André Mortreux、Mathieu Sauthier
DOI:10.1002/chem.201300633
日期:2013.7.22
The nickel‐catalysed hydroalkoxylation of butadiene is promoted by a nickel(0)/dppb catalyst (dppb=1,4‐bis(diphenylphosphino)butane; see scheme). By following this new synthetic procedure, alkylbutenyl ethers are readily obtained from an alcohol and 1,3‐butadiene with exclusion of dimerisation and telomerisation products.
Deciphering the Mechanism of the Nickel-Catalyzed Hydroalkoxylation Reaction: A Combined Experimental and Computational Study
作者:Alexis Mifleur、Delphine S. Mérel、André Mortreux、Isabelle Suisse、Frédéric Capet、Xavier Trivelli、Mathieu Sauthier、Stuart A. Macgregor
DOI:10.1021/acscatal.7b00616
日期:2017.10.6
dppb) have been synthesized and characterized on the basis of VT NMR spectroscopy and X-ray crystallographic studies. Compounds 2 and 3 are shown to be catalytically competent for the hydroalkoxylation reaction. Computational studies on [(dppmb)Ni(0)(butadiene)] indicate a facile protonation that forms a cationic allylic intermediate [(dppmb)Ni(II)(η-C4H7)]OMe. C–O bond formation then occurs via external
e under catalysis by PdCl2(PhCN)2. The same imines were formed almost quantitatively by noncatalyzed reaction of the azide with the corresponding vinylic ethers. The rate of the catalyzed reaction was found to be first order each in the allylic ether and in the azide. Easiness of the imine formation from the allylic ethers depended on the nature of azide, decreasing in the order of N3SO2Me>N3CO2Me>N3Ph