Exploration of the Bis(thio)urea‐Catalyzed Atropselective Synthesis of Marinopyrrole A

The marinopyrroles are a new class of natural products with highly interesting biomedical and structural features. We herein provide a concise, nitrogen‐protective‐group‐free synthesis of marinopyrrole A, constituting the as yet most efficient route. The presented studies elaborate a straightforward and mild chlorination protocol. Moreover, the first study towards the atropselective synthesis of marinopyrrole A, using chiral, C 2 ‐symmetric bisthiourea catalysts, is presented.