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    • 4. 发明授权
    • Dissolved methyllithium-containing composition for use in synthesis
reactions
    • 用于合成反应使用溶解含甲基的组合物
    • US5677543A
    • 1997-10-14
    • US499547
    • 1995-07-07
    • Wilfried WeissPeter RittmeyerUte Emmel
    • Wilfried WeissPeter RittmeyerUte Emmel
    • C07F1/02C09K3/00
    • C07F1/02
    • Disclosed is a dissolved methyllithium-containing composition for use in synthesis reactions (synthesis composition) and processes of preparing the composition. In the sythesis composition the methyllithium is contained in a solvent of the general formula (I) ##STR1## wherein independently R.sup.1 and R.sup.2 are a hydrogen, methyl or ethyl residue and R.sup.3 and R.sup.4 are a methyl or ethyl residue. To prepare the methyllithium-containing synthesis composition of the invention lithium powder or granular lithium is dispersed in a solvent having the general formula I, methyl halide is added at a controlled rate, the reaction temperature is maintained in the range of from 0.degree. to 60.degree. C., and the resulting lithium halide is separated from the methyllithium solution.
    • 公开了用于在合成反应(合成组合物)以及制备所述组合物的过程中使用的溶解含甲基的组合物。 在合成组合物中,甲基锂包含在通式(I)的溶剂中(I),其中独立地R 1和R 2是氢,甲基或乙基残基,且R 3和R 4是甲基或乙基残基。 为了制备本发明的含甲基锂的合成组合物,将锂粉末或颗粒状锂分散在具有通式I的溶剂中,以受控的速率加入甲基卤,反应温度保持在0〜60℃ 并将所得卤化锂与甲基锂溶液分离。