Solid Supramolecular Complexes of Potassium Salts ofN-Methoxynitroaniline Derivatives and Methoxyamino-3,5-dinitropyridine with 18-Crown-6 Ether
作者:Irina Cristina Covaci、Titus Constantinescu、Miron T. Caproiu、Constantin Luca、Alexandru T. Balaban
DOI:10.1002/1099-0690(200011)2000:21<3569::aid-ejoc3569>3.0.co;2-5
日期:2000.11
substituted N-methoxynitroaniline derivatives (1) or 2-methoxyamino-3,5-dinitropyridine (2) with potassium hydroxide afford the corresponding potassium salts (K+A−) in high yield. After dissolution of these salts in dichloromethane in the presence of 18-crown-6 ether (18-C-6), the addition of petroleum ether led to the precipitation of the corresponding solid supramolecular complexes of the type [18-C-6···K]+A−
取代的 N-甲氧基硝基苯胺衍生物 (1) 或 2-甲氧基氨基-3,5-二硝基吡啶 (2) 与氢氧化钾的反应以高产率提供相应的钾盐 (K+A-)。在 18-crown-6 醚 (18-C-6) 存在下将这些盐溶解在二氯甲烷中后,加入石油醚导致相应的 [18-C-6· ··K]+A-,化学计量比为1:1:1。讨论了 UV/vis 和 1H NMR 光谱。已确定 N-甲氧基-2-氰基-4,6-二硝基苯胺围绕 Ar-N 键旋转的势垒 ΔG≠ = 15.3 ± 0.2 kcal/mol。由2衍生的超分子复合物[18-C-6…K]+A-用碘甲烷N-甲基化得到3,用2-氯-3,5-二硝基吡啶N-芳基化得到4。