Synthesis of Polyfunctionalized 2,5-Dicarboxylated Pyrrolidine Derivatives by 1,3-Dipolar Cycloaddition Reactions of Azomethine Ylides
作者:Claudia Wittland、Ulrich Flörke、Nikolaus Risch
DOI:10.1055/s-1997-1342
日期:1997.11
The stereoselective synthesis of 2,5-dicarboxylated pyrrolidine derivatives by 1,3-dipolar cycloaddition reactions of in situ generated azomethine ylides from inexpensive starting materials is described. The C2-symmetric cycloadducts are interesting precursors for new chiral auxiliaries and are transformed easily into other highly functionalized proline derivatives. The configuration of the cycloadducts has been determined by NMR data and single crystal X-ray structure analyses. The syntheses of pyrrolidine-2,3,4,5-tetracarboxylic acid and 2,3,4,5-tetrahydroxymethylpyrrolidine are also reported.
描述了通过原位生成的偶氮甲碱叶立德的 1,3-偶极环加成反应,以廉价的起始原料立体选择性合成 2,5-二羧化吡咯烷衍生物。 C2-对称环加合物是新型手性助剂的有趣前体,并且很容易转化为其他高度功能化的脯氨酸衍生物。环加合物的构型已通过 NMR 数据和单晶 X 射线结构分析确定。还报道了吡咯烷-2,3,4,5-四羧酸和2,3,4,5-四羟甲基吡咯烷的合成。