Patent ID: 6025512
Filing Date: 2000-02-15
Classification: C07C

Abstract:
A method to produce pentafulvenes comprising combining a partially substituted cyclopentadiene with lithium or an alkyl lithium and thereafter combining the partially substituted cyclopentadiene with a carbonyl containing compound, and reacting the pentafulvene with lithium aluminum hydride, alkyl lithium, a Grinard reagent, a sodium ion, or potassium ion to form a product, wherein the partially substituted cyclopentadienide is represented by the formula including all the valence isomers: ##STR8## wherein the R.sup.1 to R.sup.5 groups are independently hydrogen or a C.sub.1 to C.sub.100 group, provided at least one R group is hydrogen but not more than three R groups are hydrogen.