Synthesis of Nitrogenated Heterocycles by Asymmetric Transfer Hydrogenation of <i>N</i>-(<i>tert</i>-Butylsulfinyl)haloimines
作者:Óscar Pablo、David Guijarro、Miguel Yus
DOI:10.1021/jo4014386
日期:2013.9.20
Highly optically enriched, protected, nitrogenated heterocycles with different ring sizes have been synthesized by a very efficient methodology consisting of the asymmetric transfer hydrogenation of N-(tert-butylsulfinyl)haloimines followed by treatment with a base to promote an intramolecular nucleophilic substitution process. N-Protected aziridines, pyrrolidines, piperidines, and azepanes bearing
已经通过非常有效的方法合成了具有不同环尺寸的高度光学富集,受保护的氮化杂环,该方法包括N-(叔丁基亚磺酰基)卤代胺的不对称转移氢化,然后用碱处理以促进分子内亲核取代过程。ñ-已经获得了具有芳香族,杂芳香族和脂肪族取代基的保护的氮丙啶,吡咯烷,哌啶和氮杂环丙烷,它们的收率非常高,非对映体比例高达> 99:1。游离的杂环可通过简单而温和的脱亚磺酰化方法容易地获得。通过改变亚磺酰基基团的硫原子的绝对构型,可以制备具有相同良好结果的游离杂环的两种对映异构体。