Synthesis agent containing methyllithium/lithium bromide and processes for its preparation

摘要

Methyl lithium and lithium bromide containing synthetic agent (A) comprises a solvent (I), where the methyl lithium and lithium bromide are dissolved and the molar ratio of lithium bromide to methyl lithium is at least 0.7 and maximum 1.5. Methyl lithium and lithium bromide containing synthetic agent (A) comprises a solvent (I) of formula C(R 1>)(R 2>)(OR 3>)(OR 4>), where the methyl lithium and lithium bromide are dissolved and the molar ratio of lithium bromide to methyl lithium is at least 0.7 and maximum 1.5. R 1>, R 2>H, CH 3 or CH 2CH 3; and R 3>, R 4>CH 3 or CH 2CH 3. Independent claims are also included for the preparations of (A).