Abstract

Solid‐phase peptide synthesis (SPPS), a preferred synthetic procedure, generates by‐products and effluents in multiple equivalents for one equivalent of desired product. Presented herein is the use of a fast and efficient coupling protocol for SPPS using a benzoisothiazolone (BIT), which can be fully recycled. The BIT, as redox activator, works under very mild conditions and generates minimal amount of waste. As a case study, the BIT coupling protocol is applied to the synthesis of side chain of the recently discovered antibiotic, teixobactin.

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