Catalyst Activity and Selectivity in the Isomerising Alkoxycarbonylation of Methyl Oleate
作者:Josefine T. Christl、Philipp Roesle、Florian Stempfle、Philipp Wucher、Inigo Göttker-Schnetmann、Gerhard Müller、Stefan Mecking
DOI:10.1002/chem.201301124
日期:2013.12.9
studied as catalyst precursors in the isomerising methoxycarbonylation of methyl oleate, and were found to convert methyl oleate into the corresponding linear α,ω‐diester (L) with 70–80 % selectivity. The products of this catalytic reaction with the known [1,2‐(tBu2PCH2)2C6H4}Pd(OTf)2] complex (5 h) were fully analysed, and revealed the formation of the linear α,ω‐diester (L, 89.0 %), the methyl‐branched
不对称二膦配体的合成(3 -克)与ö甲苯基骨架和叔丁基,金刚烷基,环己基和异丙基取代基的磷部分被描述(1,2-(CH 2 PR 2)(PR' 2)C 6 H 4;3 a:R = t Bu,R'= t Bu,3 b:R = t Bu,R'= Cy,3 c:R = t Bu,R'= i Pr,3 d: R = Ad,R'= t Bu,3 e:R = Ad,R'= Cy,3 f:R = Cy,R′= Cy,3g:R = Ad,R′= Ad)。制备了相应的二膦-Pd II二triflate配合物[(P ^ P)Pd(OTf)2 ](5 a – g),并通过X射线晶体学对其结构进行了表征。这些新的配合物在油酸甲酯的甲氧基羰基异构化中作为催化剂的前体进行了研究,发现它们以70-80%的选择性将油酸甲酯转化为相应的线性α,ω-二酯(L)。该催化反应的产物与已知的[1,2,(t Bu 2 PCH 2)2