Enantioselective Ruthenium-Catalyzed 1,3-Dipolar Cycloadditions between <i>C</i>-Carboalkoxy Ketonitrones and Methacrolein: Solvent Effect on Reaction Selectivity and Its Rational
作者:Khalid B. Selim、Arnaud Martel、Mathieu Y. Laurent、Jérôme Lhoste、Sandrine Py、Gilles Dujardin
DOI:10.1021/jo5001737
日期:2014.4.18
A catalytic 1,3-dipolar cycloaddition between carboalkoxy ketonitrones and methacrolein under the effect of chiral ruthenium Lewis acid (R,R-1) was developed with high regio-, diastereo-, and enantiocontrol. The diastereochemical outcome of the cycloaddition reaction is marked by a significant solvent effect, and a divergent endo or exo control can be tuned by an appropriate choice of both the solvent
在手性钌路易斯酸(R,R - 1)的作用下,开发了具有高区域,非对映体和对映体控制能力的碳烷氧基酮硝酮与甲基丙烯醛之间的催化1,3-偶极环加成反应。环加成反应的结果diastereochemical由显著溶剂效应标记,和一个发散内切或外切控制可以通过溶剂和二者的适当选择被调谐ñ -和Ö的ketonitrone的-取代基。的溶剂效应的基本原理的基础上,异丁烯-钌配合物及其抗衡阴离子(SBF之间的相互作用的计算研究6 -),以解释所获得的选择性。