Pentafulvene synthesis

摘要

This invention relates to a method to produce pentfulvenes comprising combining a partially substituted cyclopentadiene with a carbonyl containing compound and lithium or an alkyl lithium, wherein the partially substituted cyclopentadiene is represented by the formula: wherein the R1 to R5 groups are independently hydrogen or a C1 to C100 group, provided at least one R group is hydrogen but not more than three R groups are hydrogen.