Patent ID: 6482966
Filing Date: 2002-11-19
Classification: C07C,C07F,C12C

Abstract:
A process for producing a crosslink-cyclized cyclopentadiene, comprising the steps of:reacting a cyclopentenone of the general formula (I) with an alkali metal hydride; 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, and n is an integer of 3 to 10, to thereby reduce the cyclopentenone (reduction step A) into a cyclopentenol of the general formula (II): wherein R1, R2 and n are as defined above; 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 R1, R2 and n are as defined above, and the broken line in the 5-membered ring denotes that the 5-membered ring has two double bonds.