Novel[1n]-meta-heterophane frameworks with a bis-betaine nature |
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Authors: | Alcalde E Ayala C Dinarès I Mesquida N Sánchez-Ferrando F |
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Institution: | Laboratori de Química Orgànica, Facultat de Farmàcia, Universitat de Barcelona, 08028-Barcelona, Spain. betaines@farmacia.far.ub.es |
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Abstract: | A convergent "5 + 1" and "5 + 3" synthetic strategy allowed the synthesis of the first examples of bis-betaines 2 and 3, a prototype of phanes that incorporate heterocyclic betaines. The structure of the quadrupolar macrocyclic systems 2 and 3 together with the dicationic 1(6)]- and 1(8)] meta-heterophane precursors 5*2X and 6*2X were examined by spectroscopy using 1H and 13C NMR techniques together with 1H-DNMR studies and electrospray ionization mass spectrometry. |
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