Access to 5-bromopentanal and 6-bromohexanal derivatives <i>via</i> the bromination/hydrolysis of C,O-bis-zirconocenes generated from unsaturated Weinreb amides
作者:Aurélien Coelho、Jean-Bernard Behr、Jean-Luc Vasse
DOI:10.1039/d2ob01073a
日期:——
Access to 5-bromopentanal and 6-bromohexanal derivatives from Weinreb amides is described. The method relies on the sequential C-bromination/zircona-aminal hydrolysis of bis-C,O-zirconocenes, which are generated in situ from unsaturated Weinreb amides using Schwartz's reagent. Synthetic illustrations of such bromo-aldehydes, which can act as carbocycle and heterocycle precursors, are also presented
描述了从 Weinreb 酰胺中获得 5-溴戊醛和 6-溴己醛衍生物的途径。该方法依赖于使用 Schwartz 试剂从不饱和 Weinreb 酰胺原位生成的双-C、O-锆茂的连续 C-溴化/氧化锆-氨基水解。还介绍了可以作为碳环和杂环前体的这种溴醛的合成说明。