Enantioselective Total Synthesis of (+)-Nocardioazine B

In this paper, we report an enantioselective total synthesis of (+)-nocardioazine B, a prenylated hexahydropyrrolo[2,3-b]indole (HPI) alkaloid with a central 2,5-diketopiperazine (DKP) ring. The key step in our synthetic route is a copper-catalyzed sequential arylation–alkylation of o-haloanilide derivatives. Based on this transformation, the construction of C3 all-carbon quaternary stereocenters presented in the HPI systems was achieved with high yields and excellent diastereoselectivity.