Smith Graeme, Vautravers Nicolas R, Cole-Hamilton David J
EaStCHEM, School of Chemistry, University of St. Andrews, St. Andrews, Fife, UKKY16 9ST.
Dalton Trans. 2009 Feb 7(5):872-7. doi: 10.1039/b812132j. Epub 2008 Dec 10.
A wide range of unidentate phosphines have been studied as ligands for the palladium-catalysed methoxycarbonylation of ethene in the presence of methanesulfonic acid using methanol as the solvent. At high phosphine to Pd ratios, methyl propanoate is formed at a low rate. However, at P-Pd ratios of 4 : 1, some unidentate phosphines promote the formation of polyketone with moderate rates. Analysis of all the phosphines shows that good electron donating power, combined with small size, favours polyketone formation.
在以甲醇为溶剂、存在甲磺酸的条件下，人们研究了多种单齿膦作为钯催化乙烯甲氧基羰基化反应的配体。在膦与钯的比例较高时，丙酸甲酯的生成速率较低。然而，在膦与钯的比例为4:1时，一些单齿膦能以适中的速率促进聚酮的形成。对所有膦的分析表明，良好的给电子能力与较小的尺寸相结合，有利于聚酮的形成。
