Diastereoselective Nitroaldol Reaction Catalyzed by Binuclear Copper(II) Complexes in Aqueous Medium
作者:Rajendran Arunachalam、Chirayil S. Aswathi、Anjan Das、Rukhsana I. Kureshy、Palani S. Subramanian
DOI:10.1002/cplu.201402200
日期:2015.1
moiety and an oxygen‐rich oxalate dihydrizide/malonic dihydrizide spacer moiety, as well as their binuclear metal complexes [Cu212] and [Cu222], which adopt a 1:1 metal/ligand ratio, were synthesized and characterized. Both complexes were screened for their catalytic activity in the nitroaldol reaction, in which [Cu212] worked efficiently as catalyst for both substituted benzaldehyde and pyridinecarboxaldehyde
多齿配体1和2,其中包含一个末端吡啶基部分和一个富氧的草酸盐二氢/丙二酸二氢间隔基部分,以及它们的双核金属络合物[Cu 2 1 2 ]和[Cu 2 2 2 ],采用1合成并表征了:1的金属/配体比率。筛选了两种配合物在硝基羟醛反应中的催化活性,其中[Cu 2 1 2 ]有效地用作取代的苯甲醛和吡啶甲醛的催化剂,而[Cu 2 2 2]具有高度的底物特异性,并显示出对硝基取代的醛和吡啶甲醛的活性。此外,由于螺旋分子本质上是手性的,因此双核双链Cu 2螺旋分子中的立体化学结构有利于与硝基乙烷和硝基丙烷的非对映选择性合成产物,并使用1 H NMR光谱测定了它们各自的非对映选择性。