Synthesis & Characterization of New bis-Symmetrical Adipoyl, Terepthaloyl, Chiral Diimido-di-L-alanine Diesters & Chiral Phthaloyl-L-alanine Ester of Tripropoxy p-tert-Butyl Calix[4]arene...

Full Title: Synthesis and Characterization of New bis-Symmetrical Adipoyl, Terepthaloyl, Chiral Diimido-di-L-alanine Diesters and Chiral Phthaloyl-L-alanine Ester of Tripropoxy p-tert-Butyl Calix[4]arene and Study of Their Hosting Ability for Alanine and Na+Bis-symmetrical tripropoxy p-tert-butyl calix[4]arene esters were prepared from the reaction of tripropoxy calix[4]arene (1HPr3) with di-acyl chlorides as bridges in the presence of sodium hydride. The esters, which were synthesized from L-alanine acyl chloride derivatives, are optically active. In all of these esters, calix[4]arene cavities have a pinched cone conformation. The structures of these esters were confirmed by FT-IR, 1HNMRand 13CNMRspectroscopy, elemental analysis and ion positive FAB mass spectrometry.Keywords: Synthesis, Tripropoxy Calix[4]arene, Acyl Chloride, Double Calix[4]arenes, L-alanin