(Polyfluoro)silane-mediated generation of azomethine ylides from imines and their cycloaddition leading to N-heterocycles
作者:Mitsuo Komatsu、Hirofumi Okada、Seiji Yokoi、Satoshi Minakata
DOI:10.1016/s0040-4039(03)00011-x
日期:2003.2
The novel generation and cycloaddition of azomethine ylides from an α-(trimethylsilyl)imine using (polyfluoro)silanes is described. The method was successfully applied to an efficient one-pot process. Namely, an azaallyl anion, generated by abstraction of the hydrogen α to an imino nitrogen, was treated with a di- or trifluorosilane to give an azomethine ylide intermediate below room temperature. The
描述了使用(聚氟)硅烷从α-(三甲基甲硅烷基)亚胺新生成和环加成亚甲亚胺基化物。该方法已成功应用于高效的一锅法。即,将氢α抽象为亚氨基氮而生成的氮杂烯丙基阴离子用二氟硅烷或三氟硅烷处理,在室温以下得到give甲亚胺内酯中间体。所产生的1,3-偶极子被亲偶极子平稳地捕获,以良好的产率提供了含氮的五元杂环。