New [Ru<sub>3</sub>(CO)<sub>12</sub>]‐Based Catalysts with Imidazolinium Salt, Diimine, or Bis(oxazoline) Ligands and Ruthenium Bis(oxazoline) Complex for Tandem Isomerisation/Claisen Rearrangement of Dienyl Ethers − X‐ray Structure of [RuCl{(<i>R</i>,<i>R</i>)‐bis(isopropyloxazoline)}(<i>p</i>‐cymene)]BF<sub>4</sub>

DOI Web Site Web Site Web Site 被引用文献1件

この論文をさがす

説明

<jats:title>Abstract</jats:title><jats:p>The reaction of various 1,7‐dienes in the presence of the three‐component catalyst <jats:bold>A</jats:bold>: [Ru<jats:sub>3</jats:sub>(CO)<jats:sub>12</jats:sub>]/imidazolinium salt/Cs<jats:sub>2</jats:sub>CO<jats:sub>3</jats:sub> (1:1:2) leads to the tandem alkene isomerisation/Claisen rearrangement affording γ,δ‐unsaturated aldehydes. Other three component catalysts: [Ru<jats:sub>3</jats:sub>(CO)<jats:sub>12</jats:sub>]/diimine/Cs<jats:sub>2</jats:sub>CO<jats:sub>3</jats:sub> and [Ru<jats:sub>3</jats:sub>(CO)<jats:sub>12</jats:sub>]/benzoxazoline or chiral bis(oxazoline)/Cs<jats:sub>2</jats:sub>CO<jats:sub>3</jats:sub> offer new active catalytic systems for these tandem reactions. Two ruthenium complexes containing optically active bis(oxazoline), [RuCl{(<jats:italic>R</jats:italic>,<jats:italic>R</jats:italic>)‐bis(oxazoline)}(<jats:italic>p</jats:italic>‐cymene)]BF<jats:sub>4</jats:sub>, were prepared and the X‐ray structure of one of them (<jats:bold>18</jats:bold>) was established. The combination of chiral <jats:bold>18</jats:bold>/imidazolinium salt/Cs<jats:sub>2</jats:sub>CO<jats:sub>3</jats:sub> (1:1:2) catalysed the above reaction of 1,6‐dienes and the results suggest initial catalytic isomerisation followed by a thermal Claisen rearrangement. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)</jats:p>

収録刊行物

被引用文献 (1)*注記

もっと見る

キーワード

問題の指摘

ページトップへ