Synthesis and complexing properties of double armed diaza-15-crown-5 and diaza-18-crown-6 ethers having 4′-hydroxy-3′,5′-disubstituted benzyl groups
作者:Yoichi Habata、Tomomi Saeki、Sadatoshi Akabori
DOI:10.1002/jhet.5570380305
日期:2001.5
(9b - 16b) have been prepared by the Mannichreaction of 2,6-disubstituted phenols with the corresponding N,N'-dimethoxymethyldiaza-crown ethers in benzene. The crystal structures of the diaza-18-crown-6 ethers having iso-propyl (10b), tert-butyl (11b), and mixed methyl and tert-butyl groups (12b) at positions 3′ and 5′ of the phenolic side arms were determined using X-ray diffraction methods. Competitive