Example 2
To a cooled THF solution of the desired aminoalkoxide, an equivalent amount of MeLi is added. This solution is then added dropwise by cannula over a 30 min period to a stirred suspension of any anhydrous lanthanide(III) chloride. The resultant solution is to be stirred for 6 hours at ambient temperature. Solvent can then be removed in vacuo with the resultant residue subjected to further purification (solid-sublimation, liquid-distillation).