A new protocol for preparing thioesters from the corresponding methyl esters was developed using PrMgCl and odorless 1-dodecanthiol, CHSH, under mild reaction conditions, during which in situ-generated CHSMgCl selectively reacted with the carbonyl group of esters. A variety of aromatic and aliphatic esters were readily converted in up to 99% yield with excellent functional group tolerance. Furthermore, based on the quantitative formation of the thioesters, we successfully applied our method to a one-pot synthesis of ketones and aldehydes from esters.
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http://dx.doi.org/10.1021/acsomega.4c10622 | DOI Listing |
Angew Chem Int Ed Engl
March 2025
University of Cambridge, Yusuf Hamied Department of Chemistry, Lensfield Road, CB21EW, Cambridge, UNITED KINGDOM OF GREAT BRITAIN AND NORTHERN IRELAND.
Interleukin-2 (IL-2)-based therapeutics are emerging as treatments for immunotherapy; however, systemic activation of immune cells hampers their success. Chemically controlling the activity of potent cytokines could mitigate unwanted T cell stimulation and widen their therapeutic window. In this study, we developed a strategy for the conditional activation of proteins utilizing removable peptide nucleic acid (PNA) masking groups.
View Article and Find Full Text PDFACS Omega
March 2025
Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka 565-0871, Japan.
A new protocol for preparing thioesters from the corresponding methyl esters was developed using PrMgCl and odorless 1-dodecanthiol, CHSH, under mild reaction conditions, during which in situ-generated CHSMgCl selectively reacted with the carbonyl group of esters. A variety of aromatic and aliphatic esters were readily converted in up to 99% yield with excellent functional group tolerance. Furthermore, based on the quantitative formation of the thioesters, we successfully applied our method to a one-pot synthesis of ketones and aldehydes from esters.
View Article and Find Full Text PDFChembiochem
January 2025
School of Pharmacy, University of Wisconsin - Madison, 777 Highland Ave, Wisconsin, USA.
Peptides and proteins are important functional biomolecules both inside and outside of living organisms. The ability to prepare various types of functionalized peptides and proteins is essential for understanding fundamental biological processes, such as protein folding and post-translational modifications (PTMs), and for developing new therapeutics for many diseases, such as cancers and neurodegenerative diseases. The o-aminoaniline moiety was first proposed for activation to a thioester precursor and used for native chemical ligation to prepare large peptides and proteins.
View Article and Find Full Text PDFRSC Adv
December 2024
Departamento de Química Orgánica, Laboratorio de Química Farmacéutica, Facultad de Quimica, Universidad de la República Gral Flores 2124 Montevideo 11800 Uruguay
A new series of chiral δ-thiolactone derivatives have been prepared. These compounds exemplify the acetalic N-C-S reversibility of fused thiazolidines toward the thermodynamic product. The stereochemistry of the synthesized compounds was elucidated using X-ray crystallography, NOESY spectroscopy, and DFT calculations.
View Article and Find Full Text PDFNature
February 2025
Department of Biochemistry and Centre de Recherche en Biologie Structurale, McGill University, Montréal, Quebec, Canada.
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