Access to Optically Pure Nitrogen Heterocycles Based on Hydrozirconation of Unsaturated Secondary Amines
作者:Jan Szymoniak、M’hamed Ahari、Antoine Joosten、Jean-Luc Vasse
DOI:10.1055/s-2007-990898
日期:2008.1
Optically active N-heterocycles with four-, five-, or six-membered rings can be prepared from unsaturated secondary amines, by using a one-pot hydrozirconation/iodination sequence as the key step. The presented method allows the preparation of 2-substituted pyrrolidines enantiomeric to those previously obtained from N-allyloxazolidines. The two approaches use the same reagents (allyl bromide and aldehydes) and the same (R)-2-phenylglycinol as the chiral inductor.
具有四元环、五元环或六元环的光活性N-杂环化合物,可以通过从不饱和仲胺出发、利用一锅法进行的氢锆化/碘化反应序列作为关键步骤来制备。本文介绍的方法可用于制备与从N-烯丙基噁唑啉获得的2-取代吡咯烷相反的非对映异构体。这两种方法使用了相同的试剂(烯丙基溴和醛)以及相同的(R)-2-苯基甘氨醇作为手性诱导剂。