Stereoselective synthesis of N-heterocycles: application of the asymmetric Cu-catalyzed addition of Et2Zn to functionalized alkyl and aryl imines
作者:Isabelle Bonnaventure、André B. Charette
DOI:10.1016/j.tet.2009.04.002
日期:2009.6
The preparation of N-heterocycles from alkyl- and aryl-substituted imines is described. The key step involves a copper-catalyzed addition of diethylzinc to functionalized alkyl-substituted imines that were generated in situ from the sulfinic acid adducts. The nucleophilic addition products were then converted to 2-substituted pyrrolidines and piperidines. Aryl-substituted imines were transformed into
描述了由烷基和芳基取代的亚胺制备N-杂环的方法。关键步骤涉及铜催化将二乙基锌添加到功能化的烷基取代的亚胺中,该亚胺由亚磺酸加合物原位生成。然后将亲核加成产物转化为2-取代的吡咯烷和哌啶。将芳基取代的亚胺转化成对映体富集的1-和1,4-取代的四氢异喹啉。