Li-enolates are readily converted to Mn-enolates by treatment with manganese halides. In THF, the reaction is easily and economically performed with manganese chloride at room temperature. Mn-enolates can then be regioselectively monoalkylated in good yields. The formation of di and polyalkylated products is never observed (< 1%).
通过用卤化
锰处理,可以容易地将
锂烯酸酯转化为
锰烯酸酯。在THF中,该反应在室温下容易且经济地用
氯化锰进行。然后可以高产率将Mn-烯酸酯区域选择性地单烷基化。从未观察到二烷基化和多烷基化产物的形成(<1%)。