Late-Stage Chloride Displacements Enable Access to Peptoids with cis-Inducing Alkylammonium Side Chains

Org Lett. 2023 Aug 25;25(33):6195-6199. doi: 10.1021/acs.orglett.3c02393. Epub 2023 Aug 14.

Abstract

The synthesis of peptoids possessing multiple cis-inducing monomers with alkylammonium side chains is reported, where chloropropyl side chains are diversified on a solid support by late-stage SN2 displacements with amines. The conditions were optimized for a wide variety of primary, secondary, and tertiary alkyl amine nucleophiles. We also demonstrated that multiple chloride displacements could be achieved on sequences possessing trans-inducing N-aryl- and N-imino glycine monomers.