N,N-Dibromobenzenesulfonamide(dibromoamine-B), which is prepared easily in high yield, has been employed as effective brominating agent for carbanionic substrates under mild conditions. β-Diketones and β-ketoesters were brominated by this reagent without using any bases. The reagent can be recovered, rebrominated, and reused several times.

中文翻译：

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N,N-二溴苯磺酰胺：一种有用的可再生试剂，可用于各种碳负离子底物的溴化

N,N-二溴苯磺酰胺（二溴胺-B）易于高产率制备，已被用作温和条件下碳负离子底物的有效溴化剂。β-二酮和β-酮​​酯在不使用任何碱的情况下被该试剂溴化。该试剂可以回收、再溴化和重复使用多次。