Process for the preparation of condensed cyclopentadiene derivatives, 1, 3 disubstituted derivatives and metallocene type compounds containing them as ligand
申请人:HONSHU CHEMICAL INDUSTRY CO. LTD.
公开号:EP1122229A1
公开(公告)日:2001-08-08
A process for producing a crosslink-cyclized cyclopentadiene, comprising the steps of reacting a cyclopentenone with an alkali metal hydride to thereby reduce the cyclopentenone (reduction step A) into a cyclopentenol; and reacting the cyclopentenol with a dehydrating agent to thereby dehydrate the cyclopentenol (dehydration step B) into a crosslink-cyclized cyclopentadiene of the general formula (III):
wherein each of R1 and R2 independently represents a hydrogen atom or a linear or branched saturated alkyl group having 1 to 6 carbon atoms, n is an integer of 3 to 10, and the broken line in the 5-membered ring denotes that the 5-membered ring has two double bonds.
一种生产横链环化环戊二烯的工艺,包括以下步骤:将环戊烯酮与碱金属氢化物反应,从而将环戊烯酮还原(还原步骤 A)为环戊烯醇;以及将环戊烯醇与脱水剂反应,从而将环戊烯醇脱水(脱水步骤 B)为通式(III)的横链环化环戊二烯:
其中 R1 和 R2 各自独立地代表氢原子或具有 1 至 6 个碳原子的直链或支链饱和烷基,n 为 3 至 10 的整数,5 元环中的折线表示 5 元环具有两个双键。