Abstract
A mild and modular approach to the total synthesis of the WHO-listed essential medicine desferrioxamine B is described. Hydroxamic acid fragments were installed under mild conditions, a generalized divergent acylation procedure used to access two monomer precursors, and a transfer hydrogenation reaction used to unmask the hydroxamic acid moieties. Desferrioxamine B was generated over ten linear steps as the formate salt in 17% overall yield using standard amide coupling conditions or in 13% overall yield using microwave-assisted amide coupling conditions.
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