Volume 353, Issue 10 2000069
FULL PAPER

Novel 2-cyanoacrylamido-4,5,6,7-tetrahydrobenzo[b]thiophene derivatives as potent anticancer agents

Farid M. Sroor

Corresponding Author

Farid M. Sroor

Organometallic and Organometalloid Chemistry Department, National Research Centre, Cairo, Egypt

Correspondence Farid M. Sroor, Organometallic and Organometalloid Chemistry Department, National Research Centre, Cairo 12622, Egypt.

Email: [email protected] and [email protected] (F. M. S.)

Ahmed H. M. Elwahy and Ismail A. Abdelhamid, Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt.

Email: [email protected] (A. H. M. E.) and [email protected] (I. A. A.)

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Mohamad M. Aboelenin

Mohamad M. Aboelenin

Cell Biology Department, National Research Centre, Dokki, Giza, Egypt

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Karima F. Mahrous

Karima F. Mahrous

Cell Biology Department, National Research Centre, Dokki, Giza, Egypt

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Khaled Mahmoud

Khaled Mahmoud

Pharmacognosy Department, National Research Centre, Dokki, Egypt

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Ahmed H. M. Elwahy

Corresponding Author

Ahmed H. M. Elwahy

Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt

Correspondence Farid M. Sroor, Organometallic and Organometalloid Chemistry Department, National Research Centre, Cairo 12622, Egypt.

Email: [email protected] and [email protected] (F. M. S.)

Ahmed H. M. Elwahy and Ismail A. Abdelhamid, Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt.

Email: [email protected] (A. H. M. E.) and [email protected] (I. A. A.)

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Ismail A. Abdelhamid

Corresponding Author

Ismail A. Abdelhamid

Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt

Correspondence Farid M. Sroor, Organometallic and Organometalloid Chemistry Department, National Research Centre, Cairo 12622, Egypt.

Email: [email protected] and [email protected] (F. M. S.)

Ahmed H. M. Elwahy and Ismail A. Abdelhamid, Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt.

Email: [email protected] (A. H. M. E.) and [email protected] (I. A. A.)

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First published: 13 July 2020
Citations: 48

Abstract

Ethyl 2-acrylamido-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate as well as its corresponding bis-derivatives, 510, with aliphatic linkers were synthesized, fully characterized, and tested as novel anticancer agents. The targeted compounds, 510, were obtained by the Knoevenagel condensation reactions of bis-o- or -p-aldehyde with a molar ratio of ethyl 2-(2-cyanoacetamido)-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate of 2 in the presence of piperidine in excellent yields (93–98%). The in vitro anticancer activities of the prepared compounds were evaluated against HepG2, MCF-7, HCT-116, and BJ1 cells. Compounds 7 and 9 emerged as the most promising compounds, with IC50 values of 13.5 and 32.2 µg/ml, respectively, against HepG2 cells, compared with the reference drug doxorubicin (IC50: 21.6 µg/ml). Real-time reverse-transcription polymerase chain reaction was used to measure the changes in expression levels of the COL10A1 and COL11A1, ESR1, and ERBB2, or AXIN1 and CDKN2A genes within the treated cells, as genetic markers for colon, breast, or liver cancers, respectively. Treatment of the colon cancer cells with compounds 5, 9, and 10, or breast and liver cancers cells with compounds 7, 8, 9, and 10 downregulated the expression of the investigated tumor markers. The DNA damage values (depending on comet and DNA fragmentation assays) increased significantly upon treatment of colon cancer cells with compounds 5, 9, and 10, and breast and liver cells with compounds 8, 9, and 10. The structure–activity relationship suggested that the increase of the chain of the alkyl linker increases the anticancer activity and the compounds with bis-cyanoacrylamide moieties are more active than those with one cyanoacrylamide moiety.

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