A novel kinetically-controlled peptide synthesis—Dramatic increase of chemical yield with retention of chiral integrity
摘要:
Peptide synthesis employing the highly selective reaction of isobutyl chloroformate at the carboxyl group of the N-protected amino acid, almost to the exclusion of the amino group of the C-protected amino acid, is described. This one-stage, kinetically-controlled strategy remarkably affords peptides with excellent optical purity in high chemical yields. (C) 1999 Elsevier Science Ltd. All rights reserved.
S-(2-Pyrimidinyl)- and S-(2-(4,6-dimethylpyrimidinyl))-1,1,3,3-tetramethylthiouronium hexafluorophosphates: novel reagents for in situ peptide coupling
作者:Philip Garner、Özge Şeşenoğlu、H. Ümit Kaniskan
DOI:10.1016/j.tetlet.2005.11.067
日期:2006.1
Two new reagents for in situ peptidecoupling based on the 2-mercaptopyrimidine core have been developed. The readily prepared thiouronium salts were found to promote both peptide and segmentcoupling efficiently with low racemization/epimerization levels.
Etude de la racemisation induite par la dmap dans les reactions de couplage peptidique
作者:Jean-Paul Gamet、Robert Jacquier、Jean verducci
DOI:10.1016/s0040-4020(01)88439-8
日期:1984.1
with H-hydroxybenzotriazole (HOBt). The activation of N-acylated aminoacids by the means of DMAP leads to a complete racemization. On the other hand, for the aminoacids protected under their urethansderivatives, DMAP gives better yields than HOBt with racemization extent generally equal to or slightly higer to that observed with HOBt.
An Efficient Light‐Mediated Protocol for the Direct Amide Bond Formation via a Novel Carboxylic Acid Photoactivation Mode by Pyridine‐CBr<sub>4</sub>
作者:Olga G. Mountanea、Danai Psathopoulou、Christiana Mantzourani、Maroula G. Kokotou、E. Alexandros Routsi、Demeter Tzeli、Christoforos G. Kokotos、George Kokotos
DOI:10.1002/chem.202300556
日期:2023.6.22
A UVA-light-mediated synthesis of amides from carboxylic acids and amines or amino acids is presented, taking advantage of a novel photoactivation mode using pyridine-CBr4. Mechanistic studies by DI-HRMS provide experimental evidence for the formation of various intermediates. Application in the synthesis of industrially interesting or bioactive compounds was demonstrated.
Synthesis of Amides and Peptides by Employing [4-(Acetylamino) phenyl]imidodisulfuryl Difluoride (AISF) as a Coupling Reagent
作者:Swetha Bharamawadeyar、Eti Chetankumar、Chinthaginjala Srinivasulu、Vommina V. Sureshbabu
DOI:10.1055/s-0043-1763675
日期:2024.5
A new synthetic approach for the preparation of amides and peptides containing amino acids as well as aryl acids and amines by employing [4-(acetylamino)phenyl]imidodisulfuryl difluoride (AISF) as a carboxylic acid activator under mild conditions is delineated. The use of AISF as an acid activator allows the reaction to be performed efficiently. This operationally simple amidation is amenable to a