Khalid Aqsa, Arshad Nasima, Channar Pervaiz Ali, Saeed Aamer, Mir Muhammad Ismail, Abbas Qamar, Ejaz Syeda Abida, Hökelek Tuncer, Saeed Amna, Tehzeeb Arfa
Department of Chemistry, Quaid-i-Azam University 45320 Islamabad Pakistan
Department of Chemistry, Allama Iqbal Open University 44000 Islamabad Pakistan
RSC Adv. 2022 Jun 10;12(27):17194-17207. doi: 10.1039/d2ra03160d. eCollection 2022 Jun 7.
-((4-Acetylphenyl)carbamothioyl)-2,4-dichlorobenzamide (4) was synthesized by the treatment of 2,4-dichlorobenzoyl chloride with potassium thiocyanate in a 1 : 1 molar ratio in dry acetone to afford the 2,4-dichlorobenzoyl isothiocyanate which on reaction with acetyl aniline furnished (4) in good yield and high purity. The compound was confirmed by FTIR, H-NMR, and C-NMR and single crystal X-ray diffraction studies. The planar rings were situated at a dihedral angle of 33.32(6)°. The molecules, forming S(6) ring motifs with the intramolecular N-H⋯O hydrogen bonds, were linked through intermolecular C-H⋯O and N-H⋯S hydrogen bonds, enclosing R (8) ring motifs, into infinite double chains along [101]. C-H⋯π and π⋯π interactions with an inter-centroid distance of 3.694 (1) Å helped to consolidate a three-dimensional architecture. Hirshfeld surface (HS) analysis further indicated that the most important contributions for the crystal packing were from H⋯C/C⋯H (20.9%), H⋯H (20.5%), H⋯Cl/Cl⋯H (19.4%), H⋯O/O⋯H (13.8%) and H⋯S/S⋯H (8.9%) interactions. Thus C-H⋯π (ring), π⋯π, van der Waals interactions and hydrogen bonding played the major roles in the crystal packing. The electronic structure and computed DFT (density functional theory) parameters identified the reactivity profile of compound (4). binding of (4) with RNA indicated the formation of a stable protein-ligand complex hydrogen bonding, while DNA docking studies inferred (4) as a potent groove binder. The experimentally observed hypochromic change (57.2%) in the UV-visible spectrum of (4) in the presence of varying DNA concentrations together with the evaluated binding parameters ( ; 7.9 × 10 M, Δ; -28.42 kJ mol) indicated spontaneous interaction of (4) with DNA groove binding and hence supported the findings obtained through docking analysis. This compound also showed excellent urease inhibition activity in both and vitro studies with an IC value of 0.0389 ± 0.0017 μM. However, the radical scavenging efficiency of (4) was found to be modest in comparison to vitamin C.
-((4-乙酰基苯基)氨基硫甲酰基)-2,4-二氯苯甲酰胺(4)的合成方法是:在干燥丙酮中,将2,4-二氯苯甲酰氯与硫氰酸钾按1:1的摩尔比处理,得到2,4-二氯苯甲酰异硫氰酸酯,该异硫氰酸酯与乙酰苯胺反应,以良好的产率和高纯度得到(4)。通过傅里叶变换红外光谱(FTIR)、氢核磁共振(H-NMR)、碳核磁共振(C-NMR)和单晶X射线衍射研究对该化合物进行了确证。平面环之间的二面角为33.32(6)°。分子通过分子内N-H⋯O氢键形成S(6)环基序,并通过分子间C-H⋯O和N-H⋯S氢键相连,形成R(8)环基序,沿[101]方向形成无限双链。C-H⋯π和π⋯π相互作用的质心间距为3.694(1)Å,有助于巩固三维结构。 Hirshfeld表面(HS)分析进一步表明,晶体堆积的最重要贡献来自H⋯C/C⋯H(20.9%)、H⋯H(20.5%)、H⋯Cl/Cl⋯H(19.4%)、H⋯O/O⋯H(13.8%)和H⋯S/S⋯H(8.9%)相互作用。因此,C-H⋯π(环)、π⋯π、范德华相互作用和氢键在晶体堆积中起主要作用。电子结构和计算得到的密度泛函理论(DFT)参数确定了化合物(4)的反应活性特征。(4)与RNA的结合表明形成了稳定的蛋白质-配体复合物氢键,而DNA对接研究推断(4)是一种有效的沟槽结合剂。在不同DNA浓度下,(4)的紫外可见光谱中实验观察到的减色变化(57.2%)以及评估的结合参数(;7.9×10 M,Δ;-28.42 kJ mol)表明(4)与DNA发生了自发的沟槽结合相互作用,因此支持了通过对接分析获得的结果。该化合物在体内和体外研究中均表现出优异的脲酶抑制活性,IC值为0.0389±0.0017 μM。然而,与维生素C相比,(4)的自由基清除效率适中。