Optimization of diarylazines as anti-HIV agents with dramatically enhanced solubility
Mariela Bollini1, José A Cisneros, Krasimir A Spasov
1Department of Chemistry, Yale University, New Haven, CT 06520-8107, USA.
Bioorganic & Medicinal Chemistry Letters
|August 14, 2013
Summary
New non-nucleoside inhibitors of HIV-1 reverse transcriptase offer significantly improved solubility and maintain high antiviral activity. These compounds show potent efficacy against wild-type HIV-1 and key variants, addressing a critical need in HIV treatment.
Area of Science:
- Medicinal Chemistry
- Virology
- Drug Discovery
Background:
- Non-nucleoside reverse transcriptase inhibitors (NNRTIs) are crucial for HIV-1 treatment.
- Existing NNRTIs like etravirine and rilpivirine face challenges with solubility.
- Improving solubility is key to enhancing drug delivery and efficacy.
Purpose of the Study:
- To develop novel NNRTIs with enhanced solubility and maintained high antiviral activity.
- To investigate the structure-activity relationship of modified NNRTIs.
- To identify potent NNRTI candidates against wild-type and variant HIV-1 strains.
Main Methods:
- Synthesis of novel NNRTI compounds with strategic modifications.
- Solubility testing of newly synthesized compounds.
- In vitro antiviral activity assays against HIV-1 (wild-type and variants).
- Structure-activity relationship analysis.
Main Results:
- Novel NNRTIs demonstrated approximately 100-fold greater solubility compared to etravirine and rilpivirine.
- The solubility enhancement was attributed to the introduction of a morpholinylalkoxy substituent.
- Compound 4d exhibited low-nanomolar antiviral activity against wild-type HIV-1 and key viral variants, comparable to etravirine.
- High antiviral potency was retained despite significant solubility improvements.
Conclusions:
- Strategic modification of NNRTI structure can lead to substantial solubility enhancements without compromising antiviral efficacy.
- The developed compounds represent promising candidates for improved HIV-1 therapy.
- Further development of these highly soluble NNRTIs could address limitations of current treatments.
More Related Videos
10:29Quantitative Structure-Activity Relationship, Activity Prediction, and Molecular Dynamics of Non-nucleotide Reverse Transcriptase Inhibitors
Published on: May 9, 2025
11:04Preparation of Enantiopure Non-Activated Aziridines and Synthesis of Biemamide B, D, and epiallo-Isomuscarine
Published on: June 13, 2022
Related Concept Videos
01:16Bioavailability Enhancement: Drug Solubility Enhancement
Bioavailability is a critical factor in determining a drug's effectiveness. It refers to the proportion of a drug that enters the circulation when introduced into the body and is, as a result, able to have an active effect. Enhancing bioavailability is essential for drugs with poor solubility, as it can significantly impact their therapeutic efficacy. Various methods are employed to increase the solubility of drugs, thereby enhancing their bioavailability.Micronization and nanonization are...
01:27Bioavailability Enhancement: Drug Permeability Enhancement
After oral administration, poor permeability often limits the rate at which drugs are absorbed through the intestinal epithelium. Enhancing drug permeability is crucial for effective therapy, and several strategies have been developed to overcome this challenge.One effective strategy involves the use of lipid-based formulations. These formulations enhance dissolution and solubility, targeting physiological mechanisms to increase drug absorption. This includes stimulating bile salt secretion,...
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.
01:20Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry
Orally administered drugs primarily enter the systemic circulation via passive diffusion through the intestinal membranes. The drug's absorption is influenced by drug stability in the gastrointestinal GI tract, membrane permeability, the surface area available for absorption, luminal drug concentration, and residence time in the lumen. Drug permeability can be enhanced by adjusting the lipophilicity, polarity, or molecular size of the drug, promoting its passive transport across intestinal...
01:25Basicity of Heterocyclic Aromatic Amines
Heterocyclic amines, where the N atom is a part of an alicyclic system, are similar in basicity to alkylamines. Interestingly, the heterocyclic amine having a nitrogen atom as part of an aromatic ring has much less basicity than its corresponding alicyclic counterpart. For this reason, as presented in Figure 1, piperidine (pKb = 2.8) is significantly more basic than pyridine (pKb = 8.8).
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.