The synthesis of novel crown ethers, part X, 4-propyl-and 3-ethyl-4-methylchromenone-crown ethers
作者:Esra Tiftikçi、ÇAkil Erk
DOI:10.1002/jhet.5570410603
日期:2004.11
identified using ir, 13C and 1H nmr, ms and high resolution mass spectroscopy. The cation selectivities of chromenone crown ethers with Li+, Na+ and K+ cations were estimated from the steady state emission fluorescence spectra of free and cation complexed chromenone macrocyclic ethers in acetonitrile.
从丙酰乙酸乙酯和2-乙基乙酰乙酸乙酯开始,我们制备了4-丙基-7,8-,4-丙基-6,7-,3-乙基-4-甲基-7,8-和3-乙基-4-甲基使其在DMF / Na 2 CO 3中与乙二醇的双二卤化物或二甲苯磺酸酯反应得到-6,7-二羟基-2 H-色农酮,得到12-冠的6,7-和7,8-色酮衍生物-4、15冠4和18冠6。使用ir,13 C和1 H nmr,ms和高分辨率质谱对产物进行鉴定。铬酮冠醚与Li +,Na +和K +的阳离子选择性。 根据游离和阳离子络合的色酮大环醚在乙腈中的稳态发射荧光光谱估算阳离子。