Beyond Traditional Chemistry: Pioneering Green Synthesis in Pharmaceuticals

Green chemistry principles are increasingly essential for sustainable pharmaceutical synthesis, aiming to reduce environmental impact while maintaining efficiency and product quality. This review systematically examines recent advances in green synthetic strategies, including solvent alternatives, catalytic approaches (biocatalysis, organocatalysis, transition metal catalysis), and process intensification techniques such as flow chemistry. Data were collected from peer-reviewed journals indexed in Scopus and PubMed over the past decade, focusing on innovative methodologies, industrial applications, and sustainability assessment tools. The results highlight significant progress in adopting green solvents like water and supercritical CO₂, which lower toxicity and waste. Catalysis methods, especially biocatalysis and organocatalysis, provide high selectivity and milder reaction conditions, reducing hazardous by- products. Flow chemistry enables continuous processing with enhanced safety and efficiency. Moreover, sustainability metrics such as atom economy, E-factor, and process mass intensity alongside life cycle assessment (LCA), offer quantitative means to evaluate and optimize environmental performance. Despite these advances, challenges remain in catalyst scalability, regulatory compliance, economic feasibility, and broader industrial implementation. Emerging trends including artificial intelligence- driven route design, enzyme engineering, and circular chemistry hold promise to address these barriers. The integration of green chemistry with digital tools and sustainability metrics facilitates data-driven process development and supports regulatory and corporate sustainability goals. In conclusion, green chemistry is transforming pharmaceutical manufacturing toward a more sustainable future, balancing ecological responsibility with innovation and efficiency. This review provides comprehensive insights and practical guidance for researchers and industry professionals aiming to advance sustainable pharmaceutical synthesis.