申请人:Eastman Chemical Company
公开号:US05929298A1
公开(公告)日:1999-07-27
This invention provides a process for preparing conjugated dienes using certain substituted rhenium compounds as catalysts. The substituted rhenium compounds have the formula R.sub.5 ReO.sub.3, wherein R.sub.5 is selected from the group consisting of C.sub.1 -C.sub.10 alkyl, aryl, aryl-C.sub.1 -C.sub.10 alkyl, cyclopentadienyl and cyclopentadienyl substituted with one to four C.sub.1 -C.sub.4 alkyl groups. The process of the invention thus provides a facile method for preparing conjugated dienes using the corresponding tertiary vinyl alcohol as starting material. Examples of such starting materials includes phytols, manool, 5-vinyl-5-nonanol, 1-vinyl4-tert-butylcyclohexanol, and 1-vinylcyclooctanol. The process can be carried out neat as well as in an inert solvent in the gas or solution phase.
本发明提供了一种使用某些取代的铼化合物作为催化剂制备共轭二烯的方法。所述取代的铼化合物的化学式为R.sub.5 ReO.sub.3,其中R.sub.5选择自C.sub.1-C.sub.10烷基,芳基,芳基-C.sub.1-C.sub.10烷基,环戊二烯基和带有1至4个C.sub.1-C.sub.4烷基的取代的环戊二烯基。因此,本发明提供了一种使用相应的三级烯醇作为起始材料制备共轭二烯的简便方法。这种起始材料的例子包括蜡黄醇、曼醇、5-乙烯基-5-壬醇、1-乙烯基-4-叔丁基环己醇和1-乙烯基环辛醇。该过程可以在气体或溶液相中使用惰性溶剂或不使用溶剂进行。