Synthesis, anticancer activity and QSAR study of 1,4-naphthoquinone derivatives

Area of Science:

• Medicinal Chemistry
• Organic Synthesis
• Cancer Research

Background:

• 1,4-naphthoquinone derivatives are recognized for their diverse biological activities, including anticancer properties.
• Developing novel anticancer agents with improved efficacy and reduced toxicity remains a critical challenge in oncology.

Purpose of the Study:

• To synthesize and evaluate a series of novel 2-substituted amino-3-chloro-1,4-naphthoquinone derivatives as potential anticancer agents.
• To establish quantitative structure-activity relationship (QSAR) models to understand the relationship between chemical structure and cytotoxic activity.
• To predict the activity of novel compounds and guide the design of more potent anticancer agents.

Main Methods:

• Synthesis of 2-substituted amino-3-chloro-1,4-naphthoquinone derivatives.
• In vitro cytotoxic evaluation against HepG2, HuCCA-1, A549, and MOLT-3 cancer cell lines.
• Development and validation of QSAR models using cross-validation and RMSE metrics.
• Virtual screening and prediction of cytotoxic activities for additional designed compounds.

Main Results:

• Compound 8 (m-acetylphenylamino-1,4-naphthoquinone) and compound 9 (p-acetylphenylamino-1,4-naphthoquinone) demonstrated significant cytotoxic activity against tested cancer cell lines, with IC50 values as low as 2.118 μM.
• QSAR models exhibited high predictive performance with cross-validated R values ranging from 0.9177 to 0.9753.
• QSAR analysis identified key physicochemical properties influencing cytotoxic activity, providing insights into structure-activity relationships.

Conclusions:

• The synthesized 2-substituted amino-3-chloro-1,4-naphthoquinone derivatives represent promising candidates for anticancer drug development.
• The developed QSAR models are valuable tools for predicting the activity of novel naphthoquinone analogs and can guide future drug design efforts.
• This study provides a foundation for the rational design of more potent and selective anticancer agents based on the naphthoquinone scaffold.