Dissolved methyllithium-containing composition for use in...

Details Dissolved methyllithium-containing composition for use in... Dissolved methyllithium-containing composition for use in...

C - Chemistry, Metallurgy

07

F

C07F 1/02 (2006.01)

Patent

CA 2153459

This invention relates to a dissolved methyl- lithium-containing composition for use in synthesis reactions (synthesis composition) and to processes of preparing the composition. In the synthesis composition the methyllithium is contained in a solvent of the general formula I Image wherein R1 and R2 are independently a hydrogen, methyl or ethyl residue and R3 and R4 are a methyl or ethyl residue. To prepare the methyllithium-containing synthesis composi- tion in accordance with the invention a) lithium powder or granular lithium is dispersed in a sol- vent having the general formula I and methyl halide is added at a controlled rate, b) the reaction temperature is kept in the range form 0 to 60°C, and c) the resulting lithium halide is separated from the methyl- lithium solution.

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