Monobromoferrocene (1) was obtained in 95% yield from ferrocene via lithiation with tert-BuLi/KO-tert-Bu and bromination with dibromotetrachloroethane. Starting from 1 mixtures of 1,2-dibromoferrocene (2) and apparently unreacted 1 (ranging from 80:20 to 50:50, depending on the reaction conditions) can be obtained via a lithiation- zincation- bromination sequence. These mixtures can be transferred
通过用叔-BuLi / KO-叔-Bu
锂化并用二
溴四
氯乙烷溴化,从
二茂铁中以95%的产率获得单
溴二茂铁(1)。从开始1个1,2- dibromoferrocene(的混合物2)和未反应的明显1(范围从80:20至50:50,这取决于反应条件)可以得到通过lithiation- zincation-
溴化序列。可将这些混合物与十倍过量的
四甲基哌啶锂直接转移,然后用
1,1,2,2-四溴乙烷溴化为五
溴二茂铁(3),从
二茂铁开始,总收率为36%。3的分子结构通过X射线衍射确定了1,2,3-三
溴二茂铁(4)中的α和β 。