Patent ID: 6455719
Filing Date: 2002-09-24
Classification: C07F,Y10S

Abstract:
A method for preparing a compound having the formula: which comprises:(i) providing a first reactor containing the reaction product of a cyclopentadienyl silyl amine and an alkali metal alkyl, (ii) providing a second reactor containing the adduct of formula MX4â€”DME wherein M is a group 4 element, X is a halogen, and DME is dimethoxyethane, (iii) adjusting the pot temperature of each of said first reactor and said second reactor to be within the ranges of about 20-30Â° C., (iv) thereafter combining the contents of the first reactor with the contents of the second reactor wherein a reaction mixture is produced in said second reactor, and wherein said reaction mixture produced in said second reactor contains a compound of the formula (v) distilling solvents from said reaction mixture containing said compound in said second reactor, and (vi) converting said step (iv) compound to a compound of the formula