A simple method for selective acylation of protected and unprotected hydroxylamines with bis-and tetrakis-substituted ptert-butylcalix[4]arene-acids through amide bond formation via mixed anhydrides is presented. The first crystal structure of calixhydroxamate 1 is presented.
Calixarenes O 0450 Lower Rim Substituted p-tert-Butylcalix[4]arenes. Part 11. New Ester Derivatives of Calix[4]arene, Their Ionophoric Properties and X-Ray Structure Studies. -(BOCHENSKA*, M.; LESINSKA, U.; HOFFMANN, M.; CHOJNACKI, J.; Lett. Org. Chem. 3 (2006) 11, 811-816; Dep. Chem. Technol., Tech. Univ. Gdansk, PL-80-952 Gdansk, Pol.; Eng.) -R. Staver 20-049
The synthesis of six new esters derivatives of p-tert-butylcalix [4]arene in cone conformation is described. The preliminary complexing study of new compounds in the membranes of ion selective electrodes (ISEs) indicated Na + selectivity for compounds 6, 7 and 8. The X-ray crystal structure of compound 6 is presented.
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