Related Experiment Video
Updated: Jul 15, 2025

Synthesis of 1,2-Azaborines and the Preparation of Their Protein Complexes with T4 Lysozyme Mutants
Published on: March 25, 2017
New Boron Containing Acridines: Synthesis and Preliminary Biological Study
Anna A Druzina1, Nadezhda V Dudarova1, Ivan V Ananyev2
1A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Str., 119334 Moscow, Russia.
Researchers synthesized novel acridine-cobalt bis(dicarbollide) conjugates. These compounds show potential as new agents for boron neutron capture therapy (BNCT) after demonstrating antiproliferative activity and weak DNA binding.
Area of Science:
- Medicinal Chemistry
- Boron Neutron Capture Therapy
- Organic Synthesis
Background:
- Acridine derivatives are known for their biological activities.
- Cobalt bis(dicarbollide) compounds offer unique properties for therapeutic applications.
- Developing novel agents for Boron Neutron Capture Therapy (BNCT) is an ongoing area of research.
Purpose of the Study:
- To synthesize and characterize the first conjugates of acridine with cobalt bis(dicarbollide).
- To evaluate the DNA binding affinity and antiproliferative activity of these novel conjugates.
- To explore their potential as scaffolds for Boron Neutron Capture Therapy (BNCT) agents.
Main Methods:
- Synthesis of a novel 9-azidoacridine derivative.
- Copper (I)-catalyzed azide-alkyne cycloaddition for conjugate formation.
- Single-crystal X-ray diffraction for structural determination.
- Absorbance spectroscopy for DNA interaction studies.
- MTT assay for antiproliferative activity evaluation.
Main Results:
- Successful synthesis of acridine-cobalt bis(dicarbollide) conjugates via click chemistry.
- Determination of the molecular structure of the 9-azidoacridine intermediate.
- Weak binding of the conjugates to DNA was observed.
- Evaluation of antiproliferative activity (IC50) against human cell lines.
Conclusions:
- Acridine-cobalt bis(dicarbollide) conjugates represent a novel class of compounds.
- These conjugates exhibit potential for development into new Boron Neutron Capture Therapy (BNCT) agents.
- Further research into this scaffold may lead to advanced therapeutic strategies.
More Related Videos
Related Concept Videos
Preparation of Amines: Reductive Amination of Aldehydes and Ketones
Preparation of 1° Amines: Gabriel Synthesis
Strong bases like NaOH or KOH deprotonate the phthalimide to form the corresponding anion, which acts as a nucleophile. Further, the anion attacks an...
Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation
One of the convenient methods for the preparation of aldehydes and ketones is via hydration of alkynes. Hydroboration-oxidation of alkynes is an indirect hydration reaction in which an alkyne is treated with borane followed by oxidation with alkaline peroxide to form an enol that rapidly converts into an aldehyde or a ketone. Terminal alkynes form aldehydes, whereas internal alkynes give ketones as the final product.
Acidity of 1-Alkynes
The acidic strength of hydrocarbons follows the order: Alkynes > Alkenes > Alkanes. The strength of an acid is commonly expressed in units of pKa — the lower the pKa, the stronger the acid. Among the hydrocarbons, terminal alkynes have lower pKa values and are, therefore, more acidic. For example, the pKa values for ethane, ethene, and acetylene are 51, 44, and 25, respectively, as shown here.
Hydroboration-Oxidation of Alkenes
Preparation of Alkynes: Alkylation Reaction
Alkylation of terminal alkynes with primary alkyl halides in the presence of a strong base like sodium amide is one of the common methods for the synthesis of longer carbon-chain alkynes. For example, treatment of 1-propyne with sodium amide followed by reaction with ethyl bromide yields 2-pentyne.

