Phenoxaphosphino-Modified Xantphos-Type Ligands in the Rhodium-Catalysed Hydroformylation of Internal and Terminal Alkenes
作者:Raymond P. J. Bronger、Jochem P. Bermon、Jürgen Herwig、Paul C. J. Kamer、Piet W. N. M. van Leeuwen
DOI:10.1002/adsc.200404066
日期:2004.6
the rhodium-catalysed hydroformylation. An increase in solubility from 2.3 mmol⋅L−1 to >495 mmol⋅L−1 was observed from the least soluble to the most soluble ligand. A solubility of at least 58 mmol⋅L−1 was estimated to be sufficient for a large-scale application of these ligands in hydroformylation. Highly active and selective catalysts for the rhodium-catalysed hydroformylation of 1-octene and trans-2-octene
修饰配体的溶解度是铑催化的羰基化系统效率的重要参数。为了研究在9,9-二甲基x吨骨架的2-和7-位以及2-和7-位烷基取代基的影响,开发了一种用于制备定义明确的x吨型配体的简便合成方法。配体的phenoxaphosphino部分的8位1 - 16对甲苯溶解度和这些取代基对在铑催化加氢甲酰化,配体的性能的影响。从最不溶的配体到最可溶的配体,观察到溶解度从2.3mmol·L -1增加到>495mmol·L -1。溶解度至少为58mmol·L据估计,-1对于在氢甲酰化中大规模应用这些配体是足够的。通过使用这些配体,获得了用于铑催化的1-辛烯和反式-2-辛烯加氢成壬醛的加氢甲酰化以及2-戊烯加氢成己醛的加氢甲酰化的高活性和选择性催化剂。平均速率> 1600(醛摩尔)×(摩尔Rh)-1 ×h -1 条件:p(CO / H 2)= 20 bar,T = 353 K,[Rh] = 1 mM,[烯烃]