Related Experiment Video
Updated: May 13, 2026
08:56
Synthesis of a Borylated Ibuprofen Derivative Through Suzuki Cross-Coupling and Alkene Boracarboxylation Reactions
Published on: November 30, 2022
Novel oleanolic vinyl boronates: synthesis and antitumor activity
Vânia M Moreira1, Jorge A R Salvador, Sérgio Simões
1Centre of Chemistry, Faculty of Sciences and Technology, University of Coimbra, Portugal.
European Journal of Medicinal Chemistry
|March 5, 2013
Summary
Novel oleanolic acid derivatives with boron showed significant anticancer activity against various cancer cell lines, including leukemia and solid tumors. These compounds induce apoptosis and inhibit proteasomal activity, offering potential for new cancer drug development.
Area of Science:
- Organic Chemistry
- Medicinal Chemistry
- Pharmacology
Background:
- Oleanane-type pentacyclic triterpenoids are a class of natural products with diverse biological activities.
- Developing novel anticancer agents with improved efficacy and reduced toxicity is a critical area of research.
Purpose of the Study:
- To synthesize novel oleanane-type pentacyclic triterpenoids functionalized with a boronate ester moiety.
- To evaluate the antiproliferative effects of these novel compounds against a panel of cancer cell lines.
- To investigate the mechanism of action of the most active compounds.
Main Methods:
- Palladium-catalyzed cross-coupling reactions were employed to synthesize the target compounds.
- 1D and 2D NMR spectroscopy were used for full characterization of the synthesized molecules.
- Antiproliferative activity was assessed using various hematological and solid tumor cell lines, as well as non-tumoral human fibroblasts.
Main Results:
- Three novel oleanolic vinyl boronates demonstrated significant antiproliferative activity against leukemia, Burkitt's lymphoma, cervix, colon, and ovary cancer cells.
- The active compounds selectively inhibited cancer cell growth without affecting non-tumoral human fibroblasts.
- Mechanism of action studies on leukemia Jurkat cells revealed apoptosis induction and proteasomal activity inhibition.
Conclusions:
- The incorporation of boron into the oleanolic acid core, along with amide bonds, yields compounds with potent anticancer properties.
- These novel boron-containing oleanolic acid derivatives represent promising templates for the development of new anticancer drugs.
- Further investigation into their therapeutic potential is warranted.
Related Concept Videos
03:08Hydroboration-Oxidation of Alkenes
In addition to the oxymercuration–demercuration method, which converts the alkenes to alcohols with Markovnikov orientation, a complementary hydroboration-oxidation method yields the anti-Markovnikov product. The hydroboration reaction, discovered in 1959 by H.C. Brown, involves the addition of a B–H bond of borane to an alkene giving an organoborane intermediate. The oxidation of this intermediate with basic hydrogen peroxide forms an alcohol.
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...
01:14Alkylation of β-Diester Enolates: Malonic Ester Synthesis
Malonic ester synthesis is a method to obtain α substituted carboxylic acids from ꞵ-diesters such as diethyl malonate and alkyl halides.
01:13Olefin Metathesis Polymerization: Overview
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
02:49Cancer Therapies
Cancer therapies are various modes of treatment, such as surgery, radiation therapy, and chemotherapy that are administered to cancer patients.
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...
02:47Alkynes to Aldehydes and Ketones: Hydroboration-Oxidation
Introduction
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.
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.