N,N-DIBROMOBENZENESULFONAMIDE: A USEFUL REGENRABLE REAGENT FOR BROMINATION OF VARIOUS CARBANIONIC SUBSTRATES

Abstract

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.

Keywords:

• β-Dicarbonyl compounds
• bromination
• dibromoamine-B

We are thankful to the Mazandaran and Bu-Ali Sina Universities Research Council for the partial support of this work.

Notes

^a Yield refers to the isolated productsv that exhibited physical and spectral properties in accordance with the assigned structure.