An Efficient Synthesis of Nα-Protected Amino and Peptide Acid Aryl Amides via Iodine-Mediated Oxidative Acylation of Nα-Protected Amino and Peptide Thioacids
Abstract Thioacids derived from N-protected amino or dipeptide and tripeptide acids undergo facile N-acylation with aromatic amines to afford N-protected amino or peptide aryl amides in good to excellent yields and enantiopurities. The method also furnishes difficult-to-prepare N-Fmoc amino acid 4-nitroanilides in good yields. This simple oxidative Nα-acylation of thioacids with aromatic amines proceeds
An Efficient and Epimerization Free Synthesis of C-Terminal Arylamides Derived from α-Amino Acids and Peptide Acids via T3P Activation
作者:Chilakapati Madhu、Panguluri NageswaraRao、N. Narendra、Vommina V. Sureshbabu
DOI:10.1007/s10989-013-9383-7
日期:2014.9
A high yield and rapid synthesis of enantiomerically pure N α-protected amino/peptideacid arylamides using n-propylphosphonic anhydride (T3P) in presence of N-methylmorpholine is described. The generality of the reaction has been studied for various N α-protected amino acids with diverse range of aromatic amines and coumarin derivatives.
Enzymatic Synthesis of <i>C</i>-Terminal Arylamides of Amino Acids and Peptides
作者:Timo Nuijens、Claudia Cusan、John A. W. Kruijtzer、Dirk T. S. Rijkers、Rob M. J. Liskamp、Peter J. L. M. Quaedflieg
DOI:10.1021/jo900634g
日期:2009.8.7
A mild and cost-efficient chemo-enzymatic method for the synthesis of C-terminal arylamides of amino acid and peptides is described. Using the industrial serine protease Alcalase under near-anhydrous conditions, C-terminal arylamides of N-Cbz-protected amino acids and peptides could be obtained from the corresponding C-terminal carboxylic acids, methyl (Me) or benzyl (Bn) esters, in hi-h chemical and enantio- and diastereomeric purities. Yields ranged between 50% and 95% depending on the size of the aryl substituents and the presence of electron-withdrawing substituents. Complete (alpha-C-terminal selectivity could be obtained even in the presence of various unprotected side-chain functionalities such as beta/gamma-carboxyl, hydroxyl, and guanidino groups. In addition, the use of the cysteine protease papain and the lipase Cal-B gave anilides in high yields. The chemo-enzymatic synthesis of arylamides proved to be completely free of racemization, in contrast to the state-of-the-art chemical methods.
[EN] CHEMO-ENZYMATIC SYNTHESIS OF A C-TERMINAL ARYL AMIDE OF AN AMINO ACID OR PEPTIDE<br/>[FR] SYNTHÈSE CHIMIO-ENZYMATIQUE D'UN ARYLAMIDE DE C-TERMINAL D'UN ACIDE AMINÉ OU PEPTIDE
申请人:DSM IP ASSETS BV
公开号:WO2009080631A2
公开(公告)日:2009-07-02
The present invention relates to a method for preparing an aryl amide, comprising reacting an aryl amine with a compound selected from N-protected amino acids and optionally N-protected peptides in the presence of a hydrolytic enzyme. The invention further relates to the use of a compound obtained in a method according to the invention in the manufacture of a diagnostic. In addition the invention relates to the use of a compound obtained in a method according to the invention as a substrate for a proteolytic enzyme.
Efficient Amidation from Carboxylic Acids and Azides via Selenocarboxylates: Application to the Coupling of Amino Acids and Peptides with Azides
作者:Xinghua Wu、Longqin Hu
DOI:10.1021/jo061703n
日期:2007.2.1
A facileone-pot procedure for the coupling of carboxylicacid and azide via selenocarboxylate and selenatriazoline has been developed and successfully applied to the coupling of amino acids and peptides with azides. Selenocarboxylates are readily prepared by the reaction of the activated carboxylicacids with LiAlHSeH under mild conditions. The selenocarboxylates formed in situ are used to react directly