10.1039/c39880000721
This research aims to develop a synthetic route for Aflatoxin B2, a highly toxic and carcinogenic metabolite produced by various Aspergillus species. The study focuses on synthesizing a ring A differentiated tetrahydrofurobenzofuran intermediate, which can be converted into Aflatoxin B2. Key chemicals used in the research include 3,5-dimethoxy phenol, ortho-iodophenol, lead tetra-acetate (LTA), di-isobutylaluminum hydride (DIBAL-H), and t-butyl mercaptide. The researchers successfully synthesized the intermediate compound through a series of reactions, including iodination, reduction, and cyclization, achieving an overall yield of approximately 4%. The study concludes that the synthesized intermediate can be further converted into Aflatoxin B2, demonstrating a feasible synthetic pathway. The research also highlights the challenges in differentiating the oxygen substituents on ring A and presents a method to selectively demethylate the intermediate using t-butyl mercaptide, achieving improved selectivity and yield. This work represents a significant advancement in the synthesis of aflatoxins and lays the foundation for further studies on their structure and toxicity.