Pd-Catalysed oxidative carbonylation of α-amino amides to hydantoins under mild conditions
作者:Aleksandr Voronov、Vinayak Botla、Luca Montanari、Carla Carfagna、Raffaella Mancuso、Bartolo Gabriele、Giovanni Maestri、Elena Motti、Nicola Della Ca
DOI:10.1039/d1cc04154a
日期:——
The first example of palladium-catalysed oxidative carbonylation of unprotected α-amino amides to hydantoins is described here. The selective synthesis of the target compounds was achieved undermildconditions (1 atm of CO), without ligands and bases. The catalytic system overrode the common reaction pathway that usually leads instead to the formation of symmetrical ureas.
killing by peptidomimetics while avoiding toxicity to normal cells. The influences of type of amino acid and substituent, length of substituent, and stereochemistry of amino acids on antibacterial activity and cytotoxicity of peptidomimetics were systematically investigated. The results indicate that this series of cationic peptidomimetics derived from amino acids display antitumor activity and may be
[EN] UREA-BASED PROSTATE SPECIFIC MEMBRANE ANTIGEN (PSMA) INHIBITORS FOR IMAGING AND THERAPY<br/>[FR] INHIBITEURS DE L'ANTIGÈNE MEMBRANAIRE SPÉCIFIQUE DE LA PROSTATE (PSMA) À BASE D'URÉE, POUR IMAGERIE ET TRAITEMENT THÉRAPEUTIQUE
申请人:FIVE ELEVEN PHARMA INC
公开号:WO2017116994A1
公开(公告)日:2017-07-06
The present invention relates to compounds according to Formula I and Formula IV. These compounds display very good binding affinities to the PSMA binding sites. They can be labeled with [68Ga]GaCl3 with high yields and excellent radiochemical purity. The present invention also relates to pharmaceutical compositions comprising a pharmaceutical acceptable carrier and a compound of Formula I or Formula IV, or a pharmaceutically acceptable salt thereof.
Ribozymomimetic Chemical Synthesis of Peptide Bond Using Phosphorous Acid/Oxirane Mediators
作者:S. Bayryamov、D. Danalev、N. Vassilev
DOI:10.1080/10426507.2010.501319
日期:2011.1.31
system is created that mimics natural ribosome as well as the way of ribozyme action. It uses oxirane analogue as condensation reagent and H3PO3 as activator for the carboxyl group and as protecting reagent for the NH2 function. In order to demonstrate the ability of the H3PO3/oxirane system to mimic natural peptide bond synthesis on the ribosome as well as to mimic the ribozyme synthesis and hydrolysis
Amino Acids and Peptides. VI. Novel Peptide Bond Formation catalyzed by Metal Ions. IV. Formation of optically Active Amino Acid Amides and Peptide Amides
The Cu (II)-catalyzed peptide bond formation previously reported by us, was applied to the synthesis of optically active amino acid amides and peptide amides. Treatment of an optically active amino acid ester with a primary amine in the presence of anhydrous CuCl2 afforded the desired amino acid secondary amide, without racemization, in 60-70% yield. However, the same reaction with a secondary amine with larger steric hindrance than primary amine gave an optically active tertiary amide in a very low yield as expected from the proposed mechanism. Almost all the amino acid amides could be isolated as hydrochlorides or as free bases. Some peptide amides, i. e. Z-Gly-Gly-NH-Bzl, and Z-Ala-Gly-NH-Bzl, were also prepared.