Diastereoselective Access to Nonracemic 2-<i>cis</i>-Substituted and 2,6-<i>cis</i>-Disubstituted Piperidines
作者:Nicolas Coia、Naïma Mokhtari、Jean-Luc Vasse、Jan Szymoniak
DOI:10.1021/ol202796w
日期:2011.12.2
smetalation/acylation sequence applied to Boc-protected 1-aminobut-3-enes is presented. This method was applied to the stereoselective synthesis of cyclic imines (or iminiums) which were diastereoselectively converted into 2-cis-substituted and 2,6-cis-disubstituted piperidines. The potential of this approach in the field of alkaloid synthesis was illustrated by the synthesis of (−)-coniine and (−)-indolizidine
提出了通过加到Boc保护的1-氨基丁-3-烯上的加氢锆/过渡金属/酰化序列获得非外消旋氨基酮的方法。该方法被用于环状亚胺(或亚胺基)的立体选择性合成,其被非对映选择性地转化为2-顺式-取代的和2,6-顺式-二取代的哌啶。这种方法在生物碱合成领域的潜力通过合成(-)-芥氨酸和(-)-吲哚并立定209D得以说明。此外,也可以通过该策略设想进入具有四级中心的吲哚并立定。