Efficient telomerization of 1,3-butadiene with alcohols in the presence of in situ generated palladium(0)carbene complexes

被引：84

作者：

Jackstell, R

Frisch, A

Beller, M

Röttger, D

Malaun, M

Bildstein, B

机构：

[1] Univ Rostock eV, IfOK, D-18055 Rostock, Germany

[2] Degussa AG, D-45764 Marl, Germany

[3] Univ Innsbruck, Inst Allgemeine Anorgan & Theoret Chem, A-6020 Innsbruck, Austria

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2002年 / 185卷 / 1-2期

关键词：

palladium; homogeneous catalysis; telomerization; octadienyl ethers; carbenes;

D O I：

10.1016/S1381-1169(02)00068-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The palladium-catalyzed telomerization of 1,3-butadiene with alcohols has been studied in presence of palladium and imidazolium salts, which form in situ carbene ligands. Among the different imidazolium salts tested 1,3-dimesitylimidazolium chloride (7), 1,3-bis(ferrocenylmethyl)benzimidazolium tetraphenylborate (12) and 1,3-bis(2-ferrocenylethyl)benzimidazolium bromide (13) gave the best yields of the desired octadienyl ethers. Significantly improved regioselectivities for the linear octadienylethers are obtained in the reaction of 1,3-butadiene and methanol compared to the previously optimized palladium/triphenylphosphine catalyst. Using n-butanol and iso-propanol the palladium carbene catalysts lead to a considerable increase in the corresponding telomerization products compared to standard palladium/triphenylphosphine catalysts. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：105 / 112

页数：8

共 69 条

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