申请人:Albemarle Corporation
公开号:US05648578A1
公开(公告)日:1997-07-15
A process for preparing tetraalkylated cyclopentadienes comprises (a) pyrolyzing an isobornyl carboxylate so as to form a mixture of 1,2,3- and 1,2,4-trimethylcyclopentadienes, (b) alkylating said mixture with an alkylating agent so as to form a mixture of alkyltrimethylcyclopentadiene isomers including 1,2,3,4-alkyltrimethylcyclopentadiene and, (c) thermally isomerizing the mixture of isomers obtained in step (b) so as to increase the proportion of 1,2,3,4-alkyltrimethylcyclopentadiene in said mixture of isomers.
制备四烷基环戊二烯的方法包括(a)热解异薄荷酸异戊酯以形成1,2,3-和1,2,4-三甲基环戊二烯的混合物,(b)用烷基化试剂烷基化该混合物以形成包括1,2,3,4-烷基三甲基环戊二烯在内的烷基三甲基环戊二烯异构体混合物,和(c)对步骤(b)中获得的异构体混合物进行热异构化,以增加该异构体混合物中1,2,3,4-烷基三甲基环戊二烯的比例。