环戊二烯和丁二烯环加成反应中催化剂对产物分布的影响

EFFECT OF ZIEGLER-TYPE CATALYST ON THE CYCLOADDITION REACTION BETWEEN CYCLOPENTADIENE AND BU-TADIENE

本文报道了几种过渡金属络合物与还原剂组成的齐格勒型催化剂对环戊二烯与丁二烯环加成反应四种不同产物分布的结果。

The effect of Ziegler-type catalyst on the product distribution in the cycloaddition reaction between cyclopentadiene and 1, 3-butadi-ene has been studied. The results show that Ziegler-type catalyst does not change the reaction rate remarkably in comparison with its non-catalytic equivalent, nevertheless, it can significantly change the direction of the reaction. In the presence of Cp2TiF2-LiAlH4 catalyst ,ethylidene norbornene is the main product, while 3a,4,7 7a-tetrahydroindene predominates with Cp2HfCl2-LiAlH4 as catalyst.