Process for the preparation of cyclopentadienyl metal salt and process for the preparation of derivative of cyclopentadiene using the same

A process for the preparation of a cyclopentadiene derivative of the formula (3):

• wherein
• A is an atom of the 16 group of the Periodic Table,
• B is an atom of the 14 group of the Periodic Table,
• R1, R2, R3, R4, R5 and R6 are the same or different and independently represent a hydrogen atom, a fluorine atom, a C1-C20 alkyl group which may optionally be substituted with a fluorine atom, a C7-C20 aralkyl group which may optionally be substituted with a fluorine atom, a C6-C20 aryl group which may optionally be substituted with a fluorine atom, a C1-C20 substituted silyl group, a C1-C20 alkoxyl group which may optionally be substituted with a fluorine atom, a C7-C20 aralkyloxyl group which may optionally be substituted with a fluorine atom, a C6-C20 aryloxyl group which may optionally be substituted with a fluorine atom, or a C2-C20 di-substituted amino group which may optionally be substituted with a fluorine atom, provided that any two or more of R1, R2, R3, R4, R5 and R6 may together form a ring,
• R7 is a hydrocarbon group which may optionally be substituted with a fluorine atom, or a tri-substituted silyl group, and
• Cp is a cyclopetadiene ring comprising the step of reacting a halide compound of the formula (1):
• wherein A, B, R1, R2, R3, R4, R5, R6 and R7 are the same as defined above, and Y1 is a chlorine atom, a bromine atom or an iodine atom
• with a cyclopentadiene of the formula (2):
• HCp (2)
• wherein Cp is the same as defined above, in the presence of a metal hydride and an amine compound.