Related Experiment Video
Updated: Jan 20, 2026

Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents
Published on: May 28, 2014
Pyrrolo[1,2-a]azepines Coupled with Benzothiazole and Fluorinated Aryl Thiourea Scaffolds as Promising Antioxidant
Rahul V Patel1, Bhupendra M Mistry1, Riyaz Syed2
1Department of Food Science and Biotechnology, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyenggi-do, 410820, Korea.
Background:
Cancer remains a major health concern throughout history and is responsible for huge numbers of deaths globally. The sensitivity of cancer cells to anticancer drugs is a crucial factor for developing effective treatments.
Methods:
Pyrrolo[1,2-a]azepines coupled with benzothiazole and fluorinated aryl thiourea scaffolds have been synthesized, and their potential as cytotoxic agents was investigated against different cancer cell lines such as human ovarian cancer (SK-OV-3), cervical cancer (HeLa), colon adenocarcinoma (HT-29) and non-small-cell lung carcinoma (A549). Cytotoxicity of new compounds was confirmed using SRB assay against non-cancer MDCK cell line. In addition, free radical scavenging activity of new pyrrolo[1,2-a]azepines was examined by adopting DPPH and ABTS assays.
Results:
The results concluded that the presence and position of fluorine atom(s) on the thiourea unit played a significant role in order to gain anticipated efficacies. Results of the cytotoxic assay against non-cancer MDCK cells showed that these new derivatives are safe to study further. New structures were confirmed using spectral and elemental analyses.
Conclusion:
Pyrrolo[1,2-a]azepines endowed with a benzothiazole entity and fluorinated aryl thiourea substituents were derived aiming to furnish remarkable antioxidant and anticancer activities. New molecules generated showed interesting biological result correlated with the structure and substituent of the final derivatives. Specifically, numbers and position of fluorine atoms on the thiourea unit influenced the biological profile of the mentioned compounds.
Related Concept Videos
Nomenclature of Aryl and Heterocyclic Amines
Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)
The extent of coupling depends on the C‑C bond length, the two H‑C‑C angles, any electron-withdrawing substituents, and the dihedral angle between the involved orbitals. The...
G-protein Coupled Receptors
Electrophilic 1,2- and 1,4-Addition of X2 to 1,3-Butadiene

