Production of alkali metal cyclopentadienylide and production of dihalobis(eta-substituted-cyclopentadienyl) zirconium from alkali metal cyclopentadienylide

摘要

A process for producing an alkali metal cyclopentadienylide of formula (II):wherein each of R1 and R2, which are the same or different, is C1-C8 alkyl, C6-C10 aryl, C2-C8 alkenyl or C7-C9 aralkyl; R3 is hydrogen or C1-C3 alkyl; and M+ is an alkali metal ion;which process comprises reacting together, in a solvent, an alkali metal hydride and a 1,3-cyclopentadiene of formula (I)wherein R1, R2 and R3 are as defined above. The alkali metal cyclopentadienylide produced may be further reacted with a zirconium halide to form a dihalobis (η-substituted-cyclopentadienyl)zirconium in good yield.