Grignard Type Addition of Alkenyl‐ and Alkylzirconocene Chloride to Aldehyde: Remarkable Catalytic Acceleration Effect of AgClO4.

Abstract Nucleophilic addition of alkenylzirconocene chloride [Cp 2 Zr(Cl)CH CHR] to aldehyde, which is ordinarily a slow reaction, is remarkably accelerated by a catalytic amount of AgClO 4 . The rate acceleration effect is also valid for the alkyl congener, Cp 2 Zr(Cl)R.