Safracin B as a Synthetic Linchpin: From Natural Product to Drug Intermediate and Beyond

The reactivity of safracin B is investigated as a platform for the efficient synthesis of cyanosafracin B and safracin A, with particular emphasis on the optimization of reaction conditions to achieve high yield and purity. In addition, a complete assignment of the nuclear magnetic resonance spectra of these structurally complex members of the safracin family is reported. Overall, this study deepens the understanding of structure–reactivity relationships within safracin natural products and highlights their value as versatile scaffolds for synthetic, analytical, and medicinal chemistry applications.