Total Synthesis and Configuration Assignment of (+)‐Myxoquaterine‐450

Myxoquaterines represent a recently discovered class of natural products with intriguing biological properties. They were isolated from Pendulasporacea albinea MSr 11954 and display a unique structure combining heterocyclic (pyrrole, oxazoline), hexa­ene, and 2‐amino‐1,3‐diol subunits. We have now synthesized the first example of a myxoquaterine natural product, myxoquaterine‐450, in a highly convergent fashion, in which the sensitive hexaene unit was established in the final stages of the synthesis (16 linear steps starting from l‐serine). Comparison of the synthetic material with an authentic sample allowed to establish and confirm the constitution and configuration of the natural product.