Three-Phase Microemulsion/Sol-Gel System for Aqueous Catalytic Hydroformylation of Hydrophobic Alkenes
作者:Raed Abu-Reziq、David Avnir、Jochanan Blum
DOI:10.1002/ejoc.200500244
日期:2005.9
extended the three-phase transport methodology to the catalytichydroformylation of alkenes. The method enables to carry out an all-hydrophobic reaction – substrate, product and catalyst – in water. The alkene is microemulsified in the aqueous medium and the solubilized substrate is assumed to be carried to an organometallic rhodium catalyst entrapped within a partially hydrophobicized silica sol-gel matrix
METHOD FOR HYDROFORMYLATION OF UNSATURATED COMPOUNDS
申请人:Franke Robert
公开号:US20140024860A1
公开(公告)日:2014-01-23
The invention relates to a method for hydroformylation of unsaturated compounds such as olefins and alkynes using mixtures of synthesis gas (CO/H
2
), in which either the unsaturated compounds and a catalyst are heated to a reaction temperature of 60 to 200° C. and the synthesis gas is then added, or the unsaturated compounds and the catalyst are brought into contact with pure CO at normal temperature in a preformation step, then are heated to reaction temperature and on reaching the reaction temperature the CO is replaced by the synthesis gas. The pressure is 1 to 200 bar and the CO:H
2
ratio in the synthesis gas is in the range from 1:1 to 50:1. The iridium catalyst used comprises a phosphorus-containing ligand in the iridium:ligand ratio in the range from 1:1 to 1:100. With high catalyst activities and low catalyst use, very high turnover frequencies are achieved.
Bidentate Ligands by Self-Assembly through Hydrogen Bonding: A General Room Temperature/Ambient Pressure Regioselective Hydroformylation of Terminal Alkenes
room temperature/ambient pressure regioselective hydroformylation of terminalalkenes with low catalyst loadings in good activity. The generality of this catalyst under these conditions was demonstrated for a wide range of structurally diverse alkenes equipped with many important functional groups. Thus, this practical and highly selective hydroformylation protocol, which omits the need for special pressure
Hydroformylation of olefins catalyzed by rhodium complexes with phosphinitecalix[4]arenes
作者:E. A. Karakhanov、Yu. S. Kardasheva、E. A. Runova、M. V. Terenina、A. Yu. Shadrova
DOI:10.1134/s0965544107050052
日期:2007.9
Hydroformylation of alkenes with various carbon chain lengths and arylalkenes in the presence of the catalytic system consisting of Rh(acac)(CO)(2) and phosphinitecalix[4]arenes was studied. The influence of the P/Rh and substrate/catalyst ratios, temperature, and pressure on the process and the product composition was examined.