The Construction of Quaternary Stereocenters by the Henry Reaction: Circumventing the Usual Reactivity of Substituted Glyoxals
作者:Gonzalo Blay、Víctor Hernández‐Olmos、José R. Pedro
DOI:10.1002/chem.201002888
日期:2011.3.21
enantioselective Henry reaction between alkyl‐ and arylglyoxal hydrates and nitromethane catalyzed by CuII–iminopyridine complexes takes place regioselectively on the ketone carbonyl group to give chiral tertiary nitroaldols with high functional group density and enantiomeric excesses of up to 96 %. Both aromatic and aliphatic glyoxals are suitable substrates for this reaction.
Cu II-亚氨基吡啶络合物催化的烷基和芳基乙二醛水合物与硝基甲烷之间的对映选择性亨利反应在酮羰基上区域选择性地发生,从而得到具有高官能团密度和高达96%的对映体过量的手性叔硝基醛醇。芳族和脂族乙二醛都是适合该反应的底物。