Diastereoselective michael addition of nitrogen and sulfur-nucleophiles to α,β-unsaturated δ-thiolactams
作者:Jacek G. Sośnicki、Tadeusz S. Jagodziński、Jürgen Liebscher
DOI:10.1002/jhet.5570340249
日期:1997.3
5,6-Dihydropyridine-2-thiones 2 are synthesized from 5,6-dihydropyridin-2-ones 1 and Lawesson reagent. Stereoselective Michael-like addition of amines, methylhydrazine or functionalized thiols affords trans piperidine-2-thiones 5 with the corresponding heterosubstituent in position 4 as major products. The configuration of the adducts 5 was determined by nmr-techniques.
由5,6-二氢吡啶-2-酮1和Lawesson试剂合成5,6-二氢吡啶-2-硫酮2。胺,甲基肼或官能化硫醇的立体选择性迈克尔样加成得到反式哌啶-2-硫酮5,其在4位上具有相应的杂取代基作为主要产物。加合物5的构型通过核磁共振技术确定。