Preparation of cyclopentadiene derivatives

US5254707A · kind A · utility

Assignee

• Ethyl Corporation · US

Inventors

• Jamie R. Strickler · Baton Rouge, US
• John M. Power · Garland, US
• Meng-Sheng Ao · Baton Rouge, US

Key dates

• Filing date: Dec 7, 1992
• Grant date: Oct 19, 1993
• Expiry date: Dec 7, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2601/20
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The process for preparing a compound of the formula: EQU Cp'YNHR wherein: Cp' is a cyclopentadienyl or a substituted cyclopentadienyl group, Y is a covalent bridging group which contains one or more group 14 elements, and R is a C.sub.1 to C.sub.20 hydrocarbyl or substituted hydrocarbyl group, the process comprising reacting a ligand of the formula Cp'YX, wherein Cp' and Y are as defined above and X is halogen, with a substantially equimolar amount of a primary amine of the formula NH.sub.2 R, wherein R is as defined above, in an inert solvent in the presence of a HX scavenger at an elevated temperature of at least about 35.degree. C., so as to form said compound.