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冠醚化学是近代化学领域里一门非常活跃的学科。由于冠醚的结构特殊,应用在有机合成、元素分离分析、环境化学、仿生化学以及国防尖端等方面,都取得了很大的成就,并具有广阔的发展前景。如果在冠醚分子中引进其他活性基团,更可改善冠醚的某些性能和扩大其应用范围。例如我们所合成的β-二酮冠醚(Ⅰ)、(Ⅱ),与碱金属络合时,发生在空腔外的2.4-二碳基上[1],但与镧系元素络合时,则发生在冠醚空腔内[2],这种选择性的络合反应对研究络合物化学是很有意义的。新型多配位基冠醚的合成,按文献[1][3][4]所述,反应时间和纯化时间都很长,溶剂消耗量大,操作繁杂,产率不高。我们在合成下列化合物:(1)β二酮冠醚(Ⅰ)、(Ⅱ);(2)
Crown ether chemistry is a very active discipline in modern chemistry. Due to the special structure of crown ether, great achievements have been made in the fields of organic synthesis, elemental separation and analysis, environmental chemistry, biomimetic chemistry and national defense, and have broad prospects for development. If other active groups are introduced into the crown ether molecule, some of the properties of the crown ether can be further improved and the range of application thereof can be expanded. For example, β-diketonated crown ethers (Ⅰ) and (Ⅱ) synthesized by our company, when complexed with alkali metals, occur on the 2.4-dicarbyl group outside the cavity [1], but when complexed with lanthanides , Occurs in the crown ether cavity [2]. This selective complexation reaction is of great interest in the study of complex chemistry. The synthesis of a new multi-ligand crown ether, according to the literature [1] [3] [4] described, the reaction time and purification time are long, solvent consumption, complex operation, the yield is not high. We are synthesizing the following compounds: (1) β-diketone crown ethers (Ⅰ), (Ⅱ); (2)