我们报告了一种新的正交策略,其中 N-酰基腙的N-烷基化是关键步骤。紧随其后的是叠氮基-炔烃点击化学,它代表了一种新的、直接的合成方法,用于制备基于锥 p - t Bu-calix[4] 芳烃和 1的小分子、杂二糖和杂糖簇的N-烷基-NAH 糖缀合物, 3- alt p - t Bu-thiacalix[4] 芳烃,具有潜在的药物样特性。
Structure and spectroscopic characteristics of 4-tert-butylphenoxyacetylhydrazones of arylaldehydes
摘要:
reaction of 4-tert-butylphenoxyacetylhydrazide with aromatic aldehydes and acetone a new series of 4-tert-butylphenoxyacetylhydrazones was synthesized. The structural peculiarities of the investigated molecules have been determined by means of X-ray analysis and IR spectroscopy. The diagnostically important IR spectral criteria required for the conformational analysis of acethylhydrazones have been considered. It was established that the 4-tert-butylphenoxyacetylhydrazide in condensed phase exists only as a Z(N-C(O))-conformer. Its derivatives exist as EN-C(O) and Z(N-C(O))-forms. As a rule, the prevalence of Z(N-C(O))-form has been observed in CCl4 solutions. The structure of investigated compounds is also determined by a system of inter- and intrantolecular hydrogen bonds. The energy of hydrogen bonds was estimated. (c) 2006 Elsevier B.V. All rights reserved.