A concise total synthesis of (+)-okaramine C

Abstract

The first total synthesis of (+)-okaramine C is described. Our previously described selenocyclisation-oxidative deselenation sequence was used to establish a 3a-hydroxy-pyrrolo[2,3- b]indole core, which was modified by selective epimerisation to the common pyrrolo[2,3- b]indole of the okaramines.