Synthesis of Novel Tetrahydro-1<i>H</i>-pyrazolo[4,3-<i>c</i>]pyridines <i>via</i> Intramolecular Nitrilimine Cycloaddition
作者:Albert William Garofalo、Jacek Jerzy Jagodzinski、Andrei William Konradi、Raymond Anthony Ng、Christopher Michael Semko、Hing Leung Sham、Minghua Sun、Xiaocong Michael Ye
DOI:10.1248/cpb.c110498
日期:——
The preparation of novel tetrahydro-1H-pyrazolo[4,3-c]pyridines is reported. Pivotal to the synthesis of these compounds was the development of mild reaction conditions to generate a highly functionalized nitrilimine capable of undergoing an intramolecular cycloaddition with a tethered alkyne. The desired cycloadduct was formed as an equal mixture of diastereomers.
报告了新型四氢-1H-吡唑并[4,3-c]吡啶的制备方法。合成这些化合物的关键在于开发出温和的反应条件,以生成能够与系链炔烃发生分子内环加成反应的高官能化氮亚胺。所需的环加成物以非对映异构体的等量混合物形式形成。