Related Experiment Video
Updated: May 27, 2026
07:20
Amide Coupling Reaction for the Synthesis of Bispyridine-based Ligands and Their Complexation to Platinum as Dinuclear Anticancer Agents
Published on: May 28, 2014
Novel bis(indolyl)hydrazide-hydrazones as potent cytotoxic agents
Dalip Kumar1, N Maruthi Kumar, Soumitra Ghosh
1Department of Chemistry, Birla Institute of Technology and Science, Pilani 333 031, India. dalipk@bits-pilani.ac.in
Bioorganic & Medicinal Chemistry Letters
|November 30, 2011
Summary
New bis(indolyl) hydrazide-hydrazones show potent anticancer activity. Compound 5b demonstrated significant cytotoxicity against multiple cancer cell lines, while 5k selectively targeted breast cancer cells.
Area of Science:
- Medicinal Chemistry
- Organic Synthesis
- Cancer Biology
Background:
- Indole derivatives are recognized for their diverse biological activities.
- Hydrazide-hydrazone scaffolds are explored for their therapeutic potential.
- Developing novel cytotoxic agents is crucial for cancer treatment.
Purpose of the Study:
- To synthesize and evaluate a novel series of bis(indolyl) hydrazide-hydrazones.
- To assess the in vitro cytotoxicity of these compounds against various human cancer cell lines.
- To identify potent and selective anticancer agents from this chemical class.
Main Methods:
- Synthesis of bis(indolyl) hydrazide-hydrazones (5a-n) via condensation reaction.
- Evaluation of cytotoxicity using standard assays against selected human cancer cell lines.
- Determination of half-maximal inhibitory concentration (IC50) values.
Main Results:
- Compounds 5a-n were synthesized in good yields.
- Compound 5b exhibited potent cytotoxicity against multiple cancer cell lines, with an IC50 of 1.0 μM against MDA-MB-231.
- Compound 5k displayed selective cytotoxicity against the MCF7 breast cancer cell line, with an IC50 of 3.1 μM.
Conclusions:
- The synthesized bis(indolyl) hydrazide-hydrazones represent a promising class of anticancer agents.
- Compound 5b is a potent broad-spectrum cytotoxic agent.
- Compound 5k shows potential for selective targeting of breast cancer.
More Related Videos
Related Concept Videos
01:11Aryldiazonium Salts to Azo Dyes: Diazo Coupling
The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para position.
01:32Aldehydes and Ketones with HCN: Cyanohydrin Formation Overview
Cyanohydrins are compounds that contain –CN and –OH groups on the same carbon atom. They are formed by the nucleophilic addition of the cyanide ions to the carbonyl group. Cyanide ions are highly basic and nucleophilic and can be generated from HCN under aqueous conditions. However, since HCN is a weak acid, the number of cyanide ions generated is very small. Hence, a small amount of base or KCN/NaCN is added to HCN to increase the concentration of the cyanide ions in the reaction mixture.
01:10Aldehydes and Ketones with HCN: Cyanohydrin Formation Mechanism
Cyanohydrins are formed when cyanide nucleophiles and carbonyl compounds like aldehydes and ketones react. A strong base, the cyanide ion, catalyzes cyanohydrin formation. The ions are generated from HCN under aqueous conditions. Once the cyanide ions are generated, the first step involves the nucleophilic attack of the cyanide ions on the electrophilic carbonyl carbon. This attack shifts the π electrons from the C=O to the oxygen atom forming the alkoxide ion intermediate. The alkoxide anion...
01:19Diazonium Group Substitution: –OH and –H
Nitrous acid, a weak acid, is prepared in situ via the reaction of sodium nitrite with a strong acid under cold conditions. This nitrous acid prepared in situ reacts with primary arylamines to form arenediazonium salts. Such reactions are known as diazotization reactions. As shown in Figure 1, the formation of arenediazonium salts begins with the decomposition of nitrous acid in an acidic solution to give nitrosonium ions.
01:28Inhibitors of Bacterial DNA Synthesis
Bacterial pathogens depend on precise and efficient DNA replication to sustain infection. Two type II topoisomerases—DNA gyrase and topoisomerase IV—are critical to this process, as they resolve DNA supercoiling and unlink chromosomes during replication. Fluoroquinolones, synthetic derivatives of quinolones, exploit this mechanism by stabilizing the transient DNA–enzyme cleavage complex, preventing strand religation, and causing lethal double-strand breaks. These antibiotics are selectively...
01:20Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions
Arenediazonium substitution reactions occur when the diazonium group is substituted by various functional groups such as halides, hydroxyl, nitrile, etc. For instance, arenediazonium salts react with copper(I) salts of chloride, bromide, or cyanide to form corresponding aryl chlorides, bromides, and nitriles. These reactions are named Sandmeyer reactions. Although the mechanism of this reaction is complicated, as illustrated in Figure 1, they are believed to progress via an aryl copper...