100200-99-5Relevant academic research and scientific papers
THE NUCLEOPHILIC AROMATIC PHOTOSUBSTITUTION IN PHOTOAFFINITY LABELLING. A MODEL STUDY OF A CYCLOHEXIMIDE DERIVATIVE.
Castello, A.,Marquet, J.,Moreno-Manas, M.,Sirera, X.
, p. 2489 - 2492 (1985)
The photoreactions of several 4-nitrocatechol ethers with the relatively hard nucleophile methylamine occurs at the meta position respect to the nitro group.A derivative of the antibiotic cycloheximide carrying a 4-nitrocatechol ether moiety reacts with methylamine affording an in vitro model for photoaffinity labelling.
Benzocrown Derivatives as Ionophores for Alkali Cations, II. - Synthesis and Comparison of Urethane-, Ether-, and Ester-Linked Bis-Crown Compounds and Several "Crown-Ring Free" Analogues
Toeke, Laszlo,Bitter, Istvan,Agai, Bela,Hell, Zoltan,Lindner, Ernoe,et al.
, p. 549 - 554 (2007/10/02)
Nitro derivatives of bis-crown ethers with urethane (2), ether (10), and ester (9, 16) linkage not being able to form hydrogen bridges were synthesized, and their K(1+) selectivities were determined.A remarkable effect of the NO2 group on the selectivity was observed when a NO2***NH hydrogen bond could be formed while the others showed only slight improvement in general electroanalytical parameters.Several analogues without the crown ether ring (25, 26) were also prepared, but these compounds lost their alkaline ionophore properties.
