Halogenation is an important class of organic transformation. Over the pass decades, reactions including cohalogenation, haloetherification, halolactonization and polyene cyclization are well documented. These reactions have been applied in many natural products and drug molecules synthesis. One of the research focuses in our research group is on the development of novel bromination reactions using Nbromosuccinimide (NBS), an easy handle and inexpensive halogen source. Recently, we have studied the use of a chiral cyclic selenide and sulfide catalysts in the asymmetric bromocyclization reactions. Various chiral, non-racemic pyrrolidines and lactones were prepared with good yields and ees. In this lecture, our recent progress in the development of organocatalytic and highly diastereoselective and enantioselective bromination reactions will be presented.

Recent advances in organocatalytic bromination reactions

255th National Meeting (2018)

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