70 years, numerous catalyst systems have been developed that allow for highly linear-selective (anti-Markovnikov) reactions and are used in industry to produce linear carboxylates starting from olefins. In contrast, a general catalyst system for Markovnikov-selective alkoxycarbonylation of aliphatic olefins remains unknown. In this paper, we show that a specific palladiumcatalyst system consisting
[EN] 5-MEMBERED HETEROARYL DERIVATIVES USED AS SPHINGOSINE 1-PHOSPHATE RECEPTOR AGONISTS<br/>[FR] DÉRIVÉS HÉTÉROARYLIQUES À 5 CHAÎNONS UTILISÉS COMME AGONISTES DE RÉCEPTEURS À LA SPHINGOSINE-1-PHOSPHATE
申请人:GLAXO GROUP LTD
公开号:WO2010148649A1
公开(公告)日:2010-12-29
5-membered heteroaryl derivatives of formula (I) or salts thereof, processes for their preparation, pharmaceutical compositions containing them and their uses in the treatment of various disorders mediated by S1P1 receptors are disclosed.
platinum electrodes in the presence of α,β-unsaturated esters in an acetonitrile solution containing tetraalkylammonium halide as a supporting electrolyte, produces the corresponding alkylated carboxylic acid esters in good yields.
PROCESS FOR PREPARING ESTERS FROM FORMATES AND OLEFINICALLY UNSATURATED COMPOUNDS
申请人:Franke Robert
公开号:US20140309435A1
公开(公告)日:2014-10-16
The invention provides a process for preparing esters from formates and olefinically unsaturated compounds with catalysts based on palladium compounds. In addition, the invention discloses a polyphasic reaction mixture and nonyl methyl ester mixtures prepared by the process according to the invention.
Palladium Complexes with N-Heterocyclic Carbene Ligands As Catalysts for the Alkoxycarbonylation of Olefins
作者:Gina M. Roberts、Philip J. Pierce、L. Keith Woo
DOI:10.1021/om300959f
日期:2013.3.25
Palladiumcatalysts, generated from Pd(OAc)2 and 2 equiv of N,N-dialkylbenzimidazolium iodide, are effective for the alkoxycarbonylation of olefins in high yields (>90%). Alkoxycarbonylation of 1-hexene in dimethylacetamide is achieved within 24 h at 110 °C using 1 mol % catalyst, 1000 psi CO, and ethanol. Reactions can be prepared in air, without the need of an acid additive to produce ethyl 2-methylhexanoate