Durmaz, MustafaAlpaydın, SabriSırıt, AbdulkadirYılmaz, Mustafa2020-03-262020-03-262006Durmaz, M., Alpaydın, S., Sırıt, A., Yılmaz, M., (2006). Chiral Schiff Base Derivatives of Calix[4]arene: Synthesis and Complexation Studies with Chiral and Achiral Amines. Tetrahedron-Asymmetry, (17), 2322-2327. Doi: 10.1016/j.tetasy.2006.08.0080957-4166https://dx.doi.org/10.1016/j.tetasy.2006.08.008https://hdl.handle.net/20.500.12395/20379Novel chiral Schiff base derivatives of calix[4]arenes 1-3 have been prepared from the reaction of 5,17-diformyl-25,27-dipropoxy-26,28-dihydroxycalix[4]arene 4 with (S)-(-)-1-phenylethylamine, (R)-(-)-1-cyclohexylethylamine, and (R)-(-)-2-heptylamine, respectively, by a convenient method in 69-80% yields. Spectrophotometric titrations have been performed in CHCl3 at 20-30 degrees C in order to obtain the binding constants (K) and thermodynamic quantities (Delta H and Delta S) for the stoichiometric 1:1 inclusion complexation of various amines with these new host compounds. The molecular recognition abilities and enantioselectivity for guests (R)- and (S)-alpha-phenylethylamine, 3-morpholinopropylamine and n-butylamine are discussed from a thermodynamic point of view.en10.1016/j.tetasy.2006.08.008info:eu-repo/semantics/openAccessArticle1723222327N/AWOS:000241610100003Q2