Optically Active α-Phenylethylamine as Efficient Organocatalyst in the Solvent-free Reactions Between 2,3-Butanedione and Conjugated Nitroolefins
作者:Fulvia Felluga、Cristina Forzato、Patrizia Nitti、Giuliana Pitacco、Fabio Prati、Ennio Valentin、Ennio Zangrando
DOI:10.1002/chir.22088
日期:2012.12
have been shown to promote highly diastereoselective and complementary enantioselective formal [3 + 2]carbocyclization reactions between 2,3‐butanedione and conjugated nitroalkenes with formation of enantiomerically rich 2‐hydroxy‐3‐nitrocyclopentanone derivatives. The reactions were carried out both in solvent and under solvent‐free conditions. The absolute configurations of the products were assigned
(R)-(+)和(S)-(-)-1-苯乙胺已显示出可以促进2,3-丁二酮与共轭硝基烯烃之间的高非对映选择性和互补对映选择性形式[3 + 2]碳环化反应,并形成对映体富含2-羟基-3-硝基环戊酮的衍生物 反应在溶剂和无溶剂条件下进行。通过X射线和圆二色性光谱分析确定产品的绝对构型。手性24:1005–1012,2012年。分级为4 +©2012 Wiley Periodicals,Inc.