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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]吡咯和杂种[n]呋喃[m]吡咯(n + m = 6):合成和宿主化学

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摘要

Calix [6] pyrrole 2 and the "hybrid systems" calix [3] furan (3) pyrrole 12, calix [2] furan [4] pyrrole 13, and calix[1]-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 ~1H NMR titration techniques and'or phase transfer experiments. The solid-state structures of the freereceptors 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.
机译:已经合成了杯[6]吡咯2和“混合系统”杯[3]呋喃(3)吡咯12,杯[2]呋喃[4]吡咯13和杯[1]-呋喃[5]吡咯14。通过增加容易获得的杯[6]呋喃3中呋喃单元的转化为吡咯。通过〜1 H NMR滴定技术和/或相转移实验,已经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配合物。

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