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Calix[6]pyrrole and hybrid calix[n]furan[m]pyrroles (n+m=6): Syntheses and host-guest chemistry

机译:杯[6]吡咯和杂杯[n]呋喃[m]吡咯(n + m = 6):合成和客体化学

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摘要

Calix[6]pyrrole 2 and the "hybrid systems" calix[3]furan[3]pyrrole 112, calix[2]furan[4]pyrrole 13, and calix[ L]furan[5]pyrrole 14, have been synthesized by increasing conversion of the furan units present in the readily accessible calix[6]furan 3 to pyrroles. The host-guest chemistry of these novel macrocycles towards a number of anions, including halogen ions, dihydrogen phosphate, hydrogen sulfate, nitrate, and cyanide has been investigated in solution by H-1 NMR titration techniques and/or phase transfer experiments. The solid-state structures of the free receptors 2. 12, and 13, the 1:1 complexes of calix[6]pyrrole 2 with chloride and bromide, and the 1:1 complex of 14 with chloride are also reported. [References: 69]
机译:杯[6]吡咯2和“混合体系”杯[3]呋喃[3]吡咯112,杯[2]呋喃[4]吡咯13和杯[L]呋喃[5]吡咯14合成。易于获得的杯[6]呋喃3中的呋喃单元向吡咯的转化增加。已通过H-1 NMR滴定技术和/或相转移实验研究了这些新型大环对许多阴离子的主客体化学性质,包括卤素离子,磷酸二氢根,硫酸氢根,硝酸根和氰化物。还报道了游离受体2、12和13的固态结构,杯[6]吡咯2与氯化物和溴化物的1:1配合物,以及14与氯化物的1:1的配合物。 [参考:69]

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