BROMINATION OF ALKYNES WITH SODIUM PERBORATE AND SODIUM BROMIDE
作者:G. W. Kabalka、K. Yang
DOI:10.1080/00397919808004933
日期:1998.10
Abstract Bromination of alkynes using sodiumbromide in the presence of sodium perborate provides a convenient and safe method for generating vicinal dibromoalkenes.
摘要 在过硼酸钠存在下使用溴化钠对炔烃进行溴化,为生成邻位二溴烯烃提供了一种方便且安全的方法。
Preparation and properties of novel hetero-halogen complexes
Although hetero-halogen compounds are versatile synthetic intermediates, their one-step preparation methods are scarcely known. Herein, we describe the preparation of two novel air-stable hetero-halogen complexes, (DMI)2HBr2I and (DMI)2HCl2I (DMI: 1,3-dimethyl-2-imidazolidinone). These complexes were then reacted with alkenes and alkynes, affording hetero-halogen compounds such as bromoiodides and
尽管杂卤素化合物是通用的合成中间体,但它们的一步制备方法鲜为人知。在这里,我们描述了两种新型空气稳定的杂卤素配合物的制备,(DMI) 2 HBr 2 I 和 (DMI) 2 HCl 2 I (DMI: 1,3-dimethyl-2-imidazolidinone)。然后这些配合物与烯烃和炔烃反应,一步得到溴碘化物和氯碘化物等杂卤素化合物。还用这些配合物进行碘烷氧基化和碘内酯化。
Organic synthesis using haloboration reaction VIII. Stereo- and regioselective synthesis of [z]-1,2-dihalo-1-alkenes
Method for Transforming Alkynes into (<i>E</i>)-Dibromoalkenes
作者:Jiannan Xiang、Rui Yuan、Ruijia Wang、Niannian Yi、Linghui Lu、Huaxu Zou、Weimin He
DOI:10.1021/jo501776b
日期:2014.12.5
The highly stereoselective bromination of alkynes has been realized by using copper(II) bromide as both the reacting partner and the catalyst, offering a generally efficient synthesis of (E)-dibromoalkenes. The reaction conditions are exceptionally mild, and a wide range of functional groups are well tolerated.
Electrohalogenation of propargyl acetates and amides to form the 1,1-dibromo-2-oxo functionality and a facile synthesis of furaneol