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Expedient on-resin modification of a peptide C-terminus through a benzotriazole linker.

ABSTRACT: A convenient and efficient chemical toolbox was developed for the on-resin C-terminal functionalization of various peptides. By transforming resin-bound 3,4-diaminobenzoic acid species with isoamyl nitrite, the resulting resin-bound benzotriazole entity can be efficiently displaced by nucleophiles during cleavage of the peptide-resin connection in a short reaction time. The resin cleavage step allowed for the use of various nucleophiles including water, EtOH, amines, thiol, and G5 poly(amidoamino) dendrimers with yields ranging from 66% to 82% within 5 h. This method was successfully applied to prepare the elastin sequence (VPGVG)4 through on-resin ligation in 77% yield in one day and a head-to-tail cyclic peptide, sunflower trypsin inhibitor-1, in 42% yield.

SUBMITTER: Selvaraj A

PROVIDER: S-EPMC5868309 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature

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Expedient on-resin modification of a peptide C-terminus through a benzotriazole linker.

Selvaraj Anand A Chen Hui-Ting HT Ya-Ting Huang Adela A Kao Chai-Lin CL

Chemical science 20171030 2

A convenient and efficient chemical toolbox was developed for the on-resin C-terminal functionalization of various peptides. By transforming resin-bound 3,4-diaminobenzoic acid species with isoamyl nitrite, the resulting resin-bound benzotriazole entity can be efficiently displaced by nucleophiles during cleavage of the peptide-resin connection in a short reaction time. The resin cleavage step allowed for the use of various nucleophiles including water, EtOH, amines, thiol, and G5 poly(amidoamin ...[more]

PMID: 29629103

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