Carbonic anhydrase inhibitors. Part 36. Inhibition of isozymes I and II with Schiff bases derived from chalkones and aromatic/heterocyclic sulfonamides
摘要:
A series of 27 Schiff bases was prepared by reaction of chalkones with sulfanilamide and 5-amino-1,3,4-thiadiazole-2-sulfonamide. The new compounds were characterized by analysis and standard physico-chemical methods. They possess good inhibitory properties towards isozymes I and II of carbonic anhydrase. Structure-activity effects in this series of inhibitors are also discussed.
the resulting intermediates underwent an in-situ aldolcondensationreaction to give biaryl(hetero)chalcones in good to excellent yields. When the protocol was applied to highly lipophilic or less reactive reagents, micellar catalysis was required for good results. To achieve this, we successfully used a new surfactant obtained from renewable resources that we recently designed. Furthermore, using
Carbonic anhydrase inhibitors. Part 36. Inhibition of isozymes I and II with Schiff bases derived from chalkones and aromatic/heterocyclic sulfonamides
A series of 27 Schiff bases was prepared by reaction of chalkones with sulfanilamide and 5-amino-1,3,4-thiadiazole-2-sulfonamide. The new compounds were characterized by analysis and standard physico-chemical methods. They possess good inhibitory properties towards isozymes I and II of carbonic anhydrase. Structure-activity effects in this series of inhibitors are also discussed.
Structure and theoretical approaches to a chalcone derivative
作者:Guilherme R. de Oliveira、Heibbe Cristhian B. de Oliveira、Wender Alves Silva、Valter Henrique Carvalho da Silva、José Ricardo Sabino、Felipe T. Martins
DOI:10.1007/s11224-012-9972-7
日期:2012.12
Chalcones are α,β-unsaturated aromatic ketones which can present a wide range of biological activities. Here, the structure of the chalcone (E)-1-(4-biphenyl)-3-(3,4,5-trimethoxyphenyl)prop-2-en-1-one was determined by single crystal X-ray diffraction technique and compared to those of similar compounds whose crystal structures are available in the Cambridge Structural Database. These comparisons have
查耳酮是α,β-不饱和芳香酮,具有广泛的生物活性。在这里,查尔酮 (E)-1-(4-联苯)-3-(3,4,5-三甲氧基苯基)prop-2-en-1-one 的结构是通过单晶 X 射线衍射技术确定的,并且与晶体结构可在剑桥结构数据库中获得的类似化合物相比。这些比较使我们能够得出结论,通过联苯和羰基部分消除了电子离域,而通过三甲氧基苯基和烯烃碳增加了共振效应。使用 DFT 方法对不对称单元进行单分子计算加强了这些结构关系,因为实验和理论分子几何形状相似。例如,当联苯的两个环之间的桥上的四个二面角之一为 40.25° 时,优化结构的全局最小值出现,该值接近由单晶 X 射线衍射分析确定的相应扭转的值 [41.7(3 )°]。我们的理论方法进一步提出了针对该桥周围不同扭转的另一种稳定构象异构体,尽管在晶相中没有发现这种构象异构体,因为有助于组装所研究化合物的超分子结构的 C–H…π 分子间相互作用仅保留观察到的构象异构体