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DFT Study of Dimerization Sites in Imidazo[1,2-a]pyridinyl-chalcone Series

机译:咪唑二聚体中的DFT研究[1,2-A]吡啶基 - 丙酮系列

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Quantum chemistry methods were performed in order to characterize the chemical reactivity on series of imidazo[1,2-a]pyridinyl-chalcone (IPC). In particular, the B3LYP/6-311G(d) theory level has been used to determine parameters which characterize the global and local reactivity on five molecules of the series. These compounds differ from one to another with the aryl groups. There are: 1-(2-methylimidazo[1,2-a]pyridin-3-yl)-3-phenylprop-2-en-1-one, 3-(4-fluorophenyl)-1-(2-methylimidazo [1,2-a]pyridin-3-yl)prop-2-en-1-one, 3-[4-(dimethylamino)phenyl]-1-(2-methylimidazo [1,2-a]pyridin- 3-yl)prop-2-en-1-one, 3-(2,4-dichlorophenyl)-1-(2-methylimidazo [1,2-a]pyridin-3-yl)prop-2-en-1-one, 3-(2,4-dichlorophenyl)-1-(2-methylimidazo [1,2-a]pyridin-3-yl)prop-2-en-1-one. All results lead to finding out that local nucleophilicity and electrophilicity of compounds are not substituent-dependant contrarily to their global nucleophilicity which prove to be more sensitive to the electron-donating character of the substituents. 3-[4-(Dimethylamino) phenyl]-1-(2-methylimidazo[1,2-a]pyridin-3-yl)prop-2-en-1-one was identified as the unique nucleophile compound by global reactivity. Respectively, the carbon atoms C5 and C14 are the prediction sites of electrophilic and nucleophilic attacks in the molecular skeleton of both molecules. Identification of interactions centres on IPC series is of great importance for organic synthesis and medicinal chemistry where the molecular hybridization strategy is very often used to improve biological activities of interesting therapeutic systems.
机译:进行量子化学方法,以表征咪唑系列咪唑(IPC)的化学反应性。特别地,B3LYP / 6-311G(D)理论水平已被用于确定在该系列的五个分子上表征全局和局部反应性的参数。这些化合物与芳基不同于α不同。存在:1-(2-甲基咪唑[1,2-A]吡啶-3-基)-3-苯基吡啶-2-烯-1-一,3-(4-氟苯基)-1-(2-甲基咪唑[ 1,2-a]吡啶-3-基)PROP-2-ZH-1-ON,3- [4-(二甲基氨基)苯基] -1-(2-甲基咪唑[1,2-A]吡啶-3- YL)PROP-2-ZH-1-ON,3-(2,4-二氯苯基)-1-(2-甲基咪唑[1,2-A]吡啶-3-基)PROP-2-EN-1-1 ,3-(2,4-二氯苯基)-1-(2-甲基咪唑[1,2-A]吡啶-3-基)PROP-2-Z-1-on。所有结果都导致发现化合物的局部亲核性和亲热性不是取代基 - 与其全局亲核性相依依赖,这证明对取代基的电子赋予电子赋予的电子特性更敏感。 3- [4-(二甲基氨基)苯基] -1-(2-甲基咪唑[1,2-A]吡啶-3-基)通过全球反应性鉴定为独特的亲核试剂化合物。分别,碳原子C5和C14是两种分子的分子骨架中的亲电子和亲核攻击的预测位点。 IPC系列的相互作用中心的鉴定对于有机合成和药用化学非常重要,其中分子杂交策略通常用于改善有趣的治疗系统的生物学活性。

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