N-(acridin-9-yl)arenesulfonamides: Synthesis, quantum chemical studies and crystal structure analysis to establish the tautomeric preferences
作者:Sumit S. Chourasiya、Aabid A. Wani、C.M. Nagaraja、Asit K. Chakraborti、Prasad V. Bharatam
DOI:10.1016/j.tet.2018.05.024
日期:2018.7
The potentiality of the N-(acridin-9-yl)arenesulfonamide moiety as a hybrid pharmacophore due to the distinct pharmacological activities of acridines and aryl/heteroaryl sulfonamides prompts to synthesise N-(acridin-9-yl)arenesulfonamides and study their structural properties. Various N-(acridin-9-yl)arene/heteroarenesulfonamides were obtained through the development of a new methodology adopting the
由于a啶和芳基/杂芳基磺酰胺的独特药理活性,N-(acridin-9-yl)芳烃磺酰胺部分作为杂种药效基团的潜力促使人们合成N-(acridin-9-yl)芳烃磺酰胺并研究其结构性质。通过开发一种新方法,采用Pd 2(dba)3催化的C N键形成策略,使9-氯lor啶与芳烃/杂芳烃磺酰胺反应,获得了各种N-(ac啶-9-9-基)芳烃/杂芳烃磺酰胺。1H和1313 C NMR光谱表明这些N-(ac啶-9-9基)亚芳基/杂芳烃磺酰胺仅以磺酰亚胺互变异构体的形式存在,而不是预期的磺酰胺形式存在,并且通过对新合成的化合物之一的单晶XRD分析得到证实。量子化学研究合理化了这种互变异构偏好,表明在气相中,磺酰亚胺互变异构体比磺酰胺互变异构体稳定-0.67至-5.12 kcal / mol。在固态下,磺酰亚胺互变异构体通过N H⋯O S之间的分子间氢键和a啶环之间的π-π堆积而稳定。