A simple method for the preparation of bromoferrocenes from stannylferrocenes is described: the preparation of 1,1′-dibromoferrocene is used as an example. Stannylferrocenes are reacted with bromine directly in dichloromethane to give bromoferrocenes in a self-indicating titration reaction. Also, an enhanced method of removal of the highly soluble organotin tin by-products formed in the preparation of 1,1′-diiodoferrocene from 1,1′-tri-n-butylstannylferrocene is reported allowing the preparation of large-scale quantities of 1,1′-diiodoferrocene, which is one of the most important starting materials in ferrocene chemistry.

中文翻译：

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从苯乙烯基二茂铁中自指示制备溴二茂铁和改进的二碘二茂铁的合成。

描述了一种从苯乙烯基二茂铁制备溴二茂铁的简单方法：以1,1'-二溴二茂铁的制备为例。苯乙烯二茂铁与溴直接在二氯甲烷中反应，在自指示滴定反应中得到溴二茂铁。另外，据报道，从1,1'-三-正丁基锡烷基二茂铁中脱除制备1,1'-二碘二茂铁中形成的高可溶性有机锡锡副产物的增强方法，使得可以大规模制备1 ，1'-二碘二茂铁，它是二茂铁化学中最重要的原料之一。