New Synthetic Amino Acids for the Design and Synthesis of Peptide-Based Metal Ion Sensors
摘要:
The syntheses of two new nonstandard amino acids, Flu (6) and YBp (20), and a new synthesis of Dmd (12) are reported. These residues exhibit fluorescence, metal-coordination, and fluorescence-quenching properties, respectively. These building blocks have been incorporated into peptides via solid phase peptide synthesis to afford the prototype fur a photoinduced electron transfer-based metal ion chemosensor. The fluorescence of the peptides is modulated upon metal binding. This results from a metal. ion-induced conformational change that brings the side chains of the Flu and Dmd amino acids into proximity, thereby favoring photoinduced electron transfer (PET) fluorescence quenching.
[EN] TARGETED RADIOPHARMACEUTICALS FOR THE DIAGNOSIS AND TREATMENT OF PROSTATE CANCER<br/>[FR] PRODUITS RADIOPHARMACEUTIQUES CIBLÉS POUR LE DIAGNOSTIC ET LE TRAITEMENT DU CANCER DE LA PROSTATE
申请人:BAYER AS
公开号:WO2021013978A1
公开(公告)日:2021-01-28
A compound of general formula (I): wherein: n is 1, 2 or 3; R1, R2, R3 and R4, independently represent OH or Q; and 20 Q represents a tissue-targeting moeity selected from the group consisting of or a stereoisomer, a hydrate, a solvate, or a salt thereof, or a mixture of same, methods of preparing said compounds, intermediate compounds useful for preparing said compounds, pharmaceutical compositions and combinations comprising said compounds and the use of said 25 compounds for manufacturing pharmaceutical compositions for the treatment or prophylaxis of diseases, in particular of soft tissue diseases, as a sole agent or in combination with other active ingredients.
Triaza- and tetraaza-anthracenedione derivates, their preparation and their use as pharmaceuticals
申请人:Aventis Pharma Deutschland GmbH
公开号:EP1471066A1
公开(公告)日:2004-10-27
The present invention relates to triaza- and tetraaza-anthracenedione derivatives of the formula I,
in which A, B and R1 to R5 have the meanings indicated in the claims. The compounds of formula I are valuable pharmacologically active compounds. They are useful in the treatment of various disease states including cardiovascular disorders such as atherosclerosis, thrombosis, coronary artery disease, hypertension and cardiac insufficiency. They upregulate the expression of the enzyme endothelial nitric oxide
(NO) synthase and can be applied in conditions in which an increased expression of said enzyme or an increased NO level or the normalization of a decreased NO level is desired. The invention furthermore relates to processes for the preparation of compounds of the formula I, their use, in particular as active ingredients in pharmaceuticals, and pharmaceutical preparations comprising them.
Solid-Phase Synthesis of Structurally Diverse Heterocycles by an Amide-Ketone Condensation/<i>N</i>-Acyliminium Pictet-Spengler Sequence
作者:Vitaly V. Komnatnyy、Michael Givskov、Thomas E. Nielsen
DOI:10.1002/chem.201202745
日期:2012.12.21
condensation reactions to form cyclic N‐acyliminium intermediates. In the presence of a tethered nucleophile, a second cyclization reaction results in the formation of a fused bicyclic ring system. The scope of the methodology was demonstrated by several combinations of substituted ketones and nucleophiles, the latter conveniently originating from amino acids with functionalized side chains, such as tryptophan
Inhibition of KEAP1-NRF2 protein-proteininteraction is considered a promising strategy to selectively and effectively activate NRF2, a transcription factor which is involved in several pathologies such as Huntington’s disease (HD). A library of linear peptides based on the NRF2-binding motifs was generated on the nonapeptide lead Ac-LDEETGEFL-NH2 spanning residues 76–84 of the Neh2 domain of NRF2
Synthesis of a Natural Product-Like Compound Collection through Oxidative Cleavage and Cyclization of Linear Peptides
作者:Rico Petersen、Sebastian T. Le Quement、Thomas E. Nielsen
DOI:10.1002/anie.201405747
日期:2014.10.27
Massive efforts in molecular library synthesis have strived for the development of synthesis methodology which systematically delivers natural product‐like compounds of high spatial complexity. Herein, we present a conceptually simple approach that builds on the power of solid‐phase peptidesynthesis to assemble precursor peptides (oligomers) designed to undergo oxidative cascade reactions. By harnessing