Issue 24, 2019

Biocompatible conjugation of Tris base to 2-acetyl and 2-formyl phenylboronic acid

Abstract

We describe the biocompatible conjugation of the Tris base to 2-formyl and 2-acetylphenylboronic acid (abbreviated as 2-FPBA and 2-APBA respectively), which have emerged as a versatile chemotype for fast biocompatible conjugation reactions. Tris base was found to react with 2-FPBA/APBA to give oxazolidinoboronate (OzB) complexes, analogous to the thiazolidinoboronate (TzB) and imidazolidinoboronate (IzB) complex formation that we recently reported. The Tris conjugations proceed well in complex biological media, and in contrast to the TzB/IzB complexes, the Tris conjugates exhibit superior kinetic stability (dissociation over days) as well as chemical stability against oxidation. We demonstrate the utility of such conjugation chemistries via a small molecule-induced peptide cyclization in blood serum.

Graphical abstract: Biocompatible conjugation of Tris base to 2-acetyl and 2-formyl phenylboronic acid

Supplementary files

Article information

Article type
Communication
Submitted
29 Mar 2019
Accepted
22 May 2019
First published
22 May 2019

Org. Biomol. Chem., 2019,17, 5908-5912

Biocompatible conjugation of Tris base to 2-acetyl and 2-formyl phenylboronic acid

K. Li, M. A. Kelly and J. Gao, Org. Biomol. Chem., 2019, 17, 5908 DOI: 10.1039/C9OB00726A

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