spectroscopy. The structures of the prepared ligands were also confirmed by APCI mass spectroscopy. Both chiral amines and tridentate compounds have been applied as ligands in copper (II)-catalyzed nitroaldol reactions (Henry reaction). Various reaction conditions for the Henry reaction have been studied (influence of temperature, molar ratio, solvent or copper (II) precursors). The compounds prepared with
最近制备的手性胺已用于基于
咪唑环和附加的(杂)环的新型三齿
配体的制备。通过手性胺与合适的醛(
2-苯基咪唑-4-
甲醛,2-羟基
苯甲醛或
吡啶-2-甲醛)在还原条件(H 2 / Pd或NaBH 4)下反应进行合成。制备的所有
配体在d 6 -
DMSO溶液中均显示强氢键,从而导致
咪唑互变异构现象受阻。观察到的受阻互变异构现象由1进行研究1 H NMR光谱。制备的
配体的结构也通过APCI质谱法确认。手性胺和三齿化合物都已被用作
铜(II)催化的硝基醛醇缩合反应(亨利反应)中的
配体。已经研究了亨利反应的各种反应条件(温度,摩尔比,溶剂或
铜(II)前体的影响)。与其他手性胺相比,用两个
咪唑环制备的化合物显示出快速的反应时间和对映选择性的逆转。