Stereoselective Synthesis of 3-Substituted and 3,4-Disubstituted Piperidine und Piperidin-2-one Derivatives
作者:Ellen Klegraf、Horst Kunz
DOI:10.1515/znb-2012-0413
日期:2012.4.1
The stereoselective synthesis of 3-substituted and 3,4-disubstituted piperidine and piperidin-2-one derivatives was achieved starting from 2-pyridone. After N-galactosylation and subsequent O-silylation, nucleophilic addition of organometallic reagents proceeded with high regio- and stereoselectivity at 4-position. Substituents at position 3 were stereoselectively introduced by reaction of electrophiles
以 2-吡啶酮为原料,立体选择性合成了 3-取代和 3,4-二取代哌啶和哌啶-2-one 衍生物。在 N-半乳糖基化和随后的 O-甲硅烷基化之后,有机金属试剂的亲核加成在 4 位以高区域和立体选择性进行。通过亲电子试剂与 N-半乳糖基-2-哌啶酮的酰胺烯醇化物的反应立体选择性地引入位置 3 的取代基。3-取代和 3,4-二取代哌啶和哌啶-2-one 衍生物的图形抽象立体选择性合成