Building up of Macroring in the New Synthesis of Azacrown Ethers.Structure and Complex Formation of Nitrobenzoazacrown Ethers

摘要

A cyclization of azapodand haloderivatives into nitrobenzoazacrown ethers under treatment with various bases and in their absence was investigated.The nitrobenzoazacrown ethers obtained and their complexes with metal cations were studied by X-ray diffraction method and by ~1H NMR titration.In nitrobenzoaza-15-crown-5 a capability to complex Ca~(2+)cation was found that significantly exceeded similar ability of nitrobenzocrown ether with the same size of the macroring.