Advancing Catalytic Conversion of Polysaccharide-Based Biomass to Pharmaceutical Intermediates: Processes, Challenges, and Sustainable Pathways

The field of biomass valorization for pharmaceutical applications offers a transformative solution to the challenges facing traditional chemical synthesis. Conventional supply chains for pharmaceutical intermediates largely rely on petroleum-derived chemicals, which are subject to resource constraints, escalating environmental regulations, and price volatility. Recent years have seen growing attention on sustainable feedstocks, particularly polysaccharide-based biomass and renewable platform molecules like furans, organic acids, and terpenes, which provide novel avenues for synthesizing essential intermediates such as chiral alcohols, furfural, and lactones. However, achieving high chemo-, regio-, and enantioselectivity in the conversion of complex, heterogeneous biomass streams remains a significant bottleneck. In addition, most existing processes operate at the laboratory scale using non-renewable solvents and lack integration with broader sustainability metrics such as life-cycle assessment and process mass efficiency.

Recent progress in catalysis and biocatalysis has demonstrated the feasibility of transforming biomass into valuable pharmaceutical precursors via routes designed for enhanced selectivity and process intensification. Reports highlight the use of earth-abundant metal catalysts, engineered enzymes, and continuous-flow systems to upgrade furans, bio-alcohols, and bio-acids to targeted intermediates. Notably, integrated chemoenzymatic and flow-based approaches have improved scalability and recycling of catalysts and solvents. Despite these advances, key gaps persist in the seamless integration of green chemistry tools, efficient telescoped processes, and rigorous evaluation of environmental and economic impacts. The limited adoption of holistic sustainability assessment tools, such as E-factor and PMI, further underscores the need for a comprehensive investigation into these advanced catalytic systems.

This Research Topic aims to illuminate recent advances, fundamental challenges, and future directions in the catalytic transformation of polysaccharide-based biomass into pharmaceutical intermediates, emphasizing process intensification, sustainability, and real-world applicability. The objective is to advance scientific understanding and technological innovation surrounding selective catalysis, integration of chemo- and biocatalysis, continuous manufacturing techniques, and sustainability analytics. This initiative seeks to answer questions regarding optimal catalyst design, process scalability, impurity control, and techno-economic viability, ultimately bridging the gap between laboratory proof-of-concept and industrial application.

To gather further insights into the synthesis, process optimization, and sustainability of biomass-derived pharmaceutical intermediates, we welcome articles addressing, but not limited to, the following themes:

o Novel catalytic routes for upgrading platform molecules (e.g., furans, organic alcohols/acids) to key pharmaceutical intermediates

o Chemoenzymatic approaches for enhanced selectivity and process integration

o Continuous flow and process intensification strategies for large-scale production

o Case studies evaluating life-cycle assessment, process mass intensity, and other green chemistry metrics

o Control of byproducts, impurity profiling, and development of robust purification techniques

o Technoeconomic modeling and pilot-scale demonstrations in relevant pharmaceutical syntheses

o Innovations in biocatalyst or chemo-catalyst engineering for challenging substrate transformations

o Analytical advancements for inline monitoring and quality control of polysaccharide-based biomass conversion processes