| Summary: | The target compound 3-amino-1-(2,5-d ichlorophenyl)-8-methoxy-1<i>H</i>-benzo[<i>f</i>]- chromene-2-carbonitrile <b>(4)</b> was synthesized via a reaction of 6-methoxynaphthalen-2-ol <b>(1)</b>, 2,5-dichlorobenzaldehyde <b>(2)</b>, and malononitrile <b>(3)</b> in ethanolic piperidine solution under microwave irradiation. The newly synthesized <i>β</i>-enaminonitrile was characterized by FT-IR, <sup>1</sup>H NMR, <sup>13</sup>C NMR, mass spectroscopy, elemental analysis and X-ray diffraction data. Its cytotoxic activity was evaluated against three different human cancer cell lines MDA-MB-231, A549, and MIA PaCa-2 in comparison to the positive controls etoposide and camptothecin employing the XTT cell viability assay. The analysis of the Hirshfeld surface was utilized to visualize the reliability of the crystal package. The obtained results confirmed that the tested molecule revealed promising cytotoxic activities against the three cancer cell lines. Furthermore, theoretical calculations (DFT) were carried out with the Becke3-Lee-Yang-parr (B3LYP) level using 6-311++G(d,p) basis. The optimization geometry for molecular structures was in agreement with the X-ray structure data. The HOMO-LUMO energy gap of the studied system was discussed. The intermolecular-interactions were studied through analysis of the topological-electron-density(r) using the QTAIM and NCI methods. The novel compound exhibited favorable ADMET properties and its molecular modeling analysis showed strong interaction with DNA methyltransferase 1.
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