Synthesis of imines, diimines and macrocyclic diimines as possible ligands, in aqueous solution
作者:Alina Simion、Cristian Simion、Tadeshige Kanda、Satoko Nagashima、Yoshiharu Mitoma、Tomoko Yamada、Keisuke Mimura、Masashi Tashiro
DOI:10.1039/b102749m
日期:——
Although it is recognized that the presence of water is disadvantageous for imine synthesis, we demonstrate that such synthesis can be effective in completely aqueous media, without any catalyst and under mild conditions. Thus, aryl-aryl, aryl-alkyl, alkyl-aryl and alkyl-alkyl monoimines as well as a large variety of diimines are obtained by direct condensation of the corresponding carbonyl compounds and amines, in water. The same process is used to synthesize macrocyclic diimines starting from methylene, ethylene, trimethylene and tetramethylene glycol bis(2-formylphenyl ether) and ethylene-, trimethylene- and tetramethylene-diamine, some of these macrocycles being known for their chelating properties.
虽然人们认识到水的存在对亚胺合成不利,但我们证明了在这种合成中,完全水相介质中无需任何催化剂且条件温和即可实现有效合成。因此,通过相应的羰基化合物和胺在水中的直接缩合,得到了芳基-芳基、芳基-烷基、烷基-芳基和烷基-烷基单亚胺以及大量二亚胺。同样的过程也被用于从亚甲基、亚乙基、三亚甲基和四亚甲基二醇双(2-甲酰基苯氧基)以及亚乙基、三亚甲基和四亚甲基二胺出发合成大环二亚胺,其中一些大环具有已知的螯合性质。