Cyclohexylmethylpiperidinyltriphenylpropioamide: A Selective Muscarinic M3 Antagonist Discriminating against the Other Receptor Subtypes
摘要:
To discover a highly selective M-3 antagonist, a combinatorial library was prepared. The library was designed to identify a novel structural class of M-3 antagonists by exploring the spatial arrangement of the pharmacophores in known M-3 antagonists. After the evaluation of 1000 library members, a potent M-3 antagonist, 14a (K-i = 0.31 nM), with novel structural features was identified. Compound 14a showed high selectivity for M3 receptors over the other muscarinic receptor subtypes (M-1/M-3 = 380-fold, M-2/M-3 = 98-fold, M-4/M-3 = 45-fold, M-5/M-3 = 120-fold).
Peptide nanotube aligning side chains onto one side
作者:Yuki Tabata、Shota Mitani、Shunsaku Kimura
DOI:10.1002/psc.2881
日期:2016.6
ic acid (CP5ES) is synthesized and investigated on peptide nanotube (PNT) formation. When the PNT is formed with the maximum number of intermolecular hydrogen bonds between the cyclic peptides, the sequence enables the alignment of the side chains, naphthyl groups, on one side of the PNT. Microscopic and spectroscopic observations of CP5ES crystals reveal that CP5ES forms rod‐ or needle‐shaped molecular
Mechanochemical Synthesis of Dipeptides Using Mg-Al Hydrotalcite as Activating Agent under Solvent-Free Reaction Conditions
作者:José M. Landeros、Eusebio Juaristi
DOI:10.1002/ejoc.201601276
日期:2017.1.18
peptidic bonds, herein we report the efficient, solvent-free mechanochemical synthesis of dipeptides from N-protected amino acids and amino acid methyl ester hydrochlorides in the presence of 1-hydroxybenzotriazole (HOBt) and N-ethyl-N′-[3-(dimethylamino)propyl]carbodiimide hydrochloride (EDC) as coupling reagents, and using Mg-Al hydrotalcite-like minerals as green activating agent. From commercial
Chirality and Template-Mediated Induction of Helical Preferences in Achiral β-Peptides
作者:Gangavaram V. M. Sharma、Srinivas Reddy Kodeti、Samit K. Dutta、Subash Velaparthi、Kongari Narsimulu、Gonuguntla Anjaiah、Shaik Jeelani Basha、Ajit C. Kunwar
DOI:10.1002/chem.201201892
日期:2012.12.7
This study describes chirality‐ or template‐mediated helicalinduction in achiral β‐peptides for the first time. A strategy of end capping β‐peptides derived from β‐hGly (the smallest achiral β‐amino acid) with a chiral β‐amino acid that possesses a carbohydrate side chain (β‐Caa; C‐linked carbo β‐amino acid) or a small, robust helical template derived from β‐Caas, was adopted to investigate folding
N6-dipeptide derivatives of N12-ribosyl-indolo[2,3-a]carbazole
作者:O. V. Goryunova、G. M. Zakharchuk、O. S. Zhukova、L. V. Fetisova、N. E. Kuzmina
DOI:10.1134/s106816201401004x
日期:2014.1
N-amino end-group, in DMF at 130°C, wherein the nitrogen atom of peptide amino group replaces oxygen O6 in furan ring of heterocycle and is embedded in imide nitrogen atom of pyrrole N6. The ability of the obtained compounds to inhibit growth of SKOV3 human ovarian carcinoma cells was studied, only derivative with radical >N6-(CH2)3-CO-L-Ala-OMe showed cytotoxic activity with an inhibitory concentration