257890-38-3Relevant academic research and scientific papers
Substituent effects in the binding of bis(4-fluorobenzyl)ammonium ions by dianilino[24]crown-8
Chiu, Sheng-Hsien,Liao, Kang-Shyang,Su, Jen-Kuan
, p. 213 - 216 (2007/10/03)
A series of para-substituted dianilino[24]crown-8 (DA24C8) macrocycles were synthesized and their ability to form host-guest complexes with bis(4-fluorobenzyl)ammonium ions (DFA+) were investigated. Although these crown ethers contain weakly hy
Synthesis of some 24-membered tetralactam derivatives by an unexpectedly simple route, and some macrocyclic polyether dilactams
Ghorbanian, Shohreh,Mehta, Lina K.,Parrick, John,Robson, Craig H.
, p. 14467 - 14478 (2007/10/03)
An unexpected reaction of 1,5-bis(arylamino)-3-oxapentanes 41 21 and 22 with diglycolyl dichloride gave 24-membered macrocyclic tetralactams 18, 23 and 24 respectively, in a reaction involving two molecules of each reactant (2:2 process). This was in contrast to closely related reactions of α,ω- bis(arylamino)alkylethers 5 and 6 with diglycolyl, triglycolyl and tetraglycolyl dichlorides which yielded the macrocycles 9-14 by reaction of one molecule of each reactant (1:1 process). The phenyl nuclei in 14 and 18 were formulated to give 34, 35 and 36. The aldehydes, 35 and 36 were condensed with a quinoxaline fluorophore to yield the diene 37 and the tetraene 38 respectively.
