Synthesis of two chiral octahydroindole scaffolds for drug discovery

Abstract

There are over one thousand natural products that contain the octahydroindole scaffold, which can be considered a biologically validated starting point for the design of compound libraries. Two chiral octahydroindole scaffolds have been synthesized in multigram quantities in two steps from a readily available indoline. They contain either one or two amino groups (one Boc-protected) and a protected carboxylic acid group, and have been designed for ease of conversion to a lead generation library. The structures of both scaffolds have been established unequivocally by single crystal X-ray structure determination.