Convergent Palladium-Catalyzed Stereospecific Arginine Glycosylation Using Glycals
作者:Jun Yang、Yuanwei Dai、Ryan Bartlett、Qiang Zhang
DOI:10.1021/acs.orglett.1c01218
日期:2021.5.21
peptide arginine glycosylation method is reported for the first time. A recently discovered arginine glycosylation invigorated the interests of arginine modification, which has been challenging, because of the inertness of the guanidino side chain. The approach renders the arginine glycoside construction convergently. Catalyzed by palladium complex, glycals modify arginineguanidinogroups in one step
[EN] COMPOUND, COMPOSITION AND USES THEREOF<br/>[FR] COMPOSÉ, COMPOSITION ET LEURS UTILISATIONS
申请人:RAO M SURYA
公开号:WO2017068477A1
公开(公告)日:2017-04-27
The compositions and compounds of formula I, formula II, formula III which includes a salt of polyunsaturated fatty acids in a molecular conjugate with amino acid isoleucine or its polymorphs, enantiomers, stereoisomers, solvates, and hydrates thereof. These salts may be formulated as pharmaceutical compositions. The pharmaceutical compositions may be formulated for oral, buccal, rectal, topical, transdermal, transmucosal, intravenous, parenteral administration, syrup, or injection administration. Such compositions may be used to treatment of hyperglycemia, metabolic syndrome, diabetes, pre-diabetes, lowering triglycerides or its associated complications.
Self-assembly of aliphatic dipeptides coupled with porphyrin and BODIPY chromophores
作者:Emmanouil Nikoloudakis、Konstantina Mitropoulou、Georgios Landrou、Georgios Charalambidis、Vasilis Nikolaou、Anna Mitraki、Athanassios G. Coutsolelos
DOI:10.1039/c9cc06125h
日期:——
Porphyrin and BODIPY chromophores covalently linked with aliphatic dipeptides self-assemble into various supramolecular architectures. Hydrogel formation was also observed in HFIP-water solvent mixture.
Allergens modified with oligomers consisting of 1 to 5 hydrophobic amino acids, pharmaceutical compositions containing them, a process for their preparation, and their use in the treatment of allergies.
This paper describes an original methodology for peptide bond synthesis avoiding toxic solvents and reactants. Ball-milling stoichiometric amounts of Boc-protected α-amino acid N-carboxyanhydrides (Boc-AA-NCA) or Boc-protected α-amino acid N-hydroxysuccinimideesters (Boc-AA-OSu) with α-amino acid alkyl ester salts in the presence of NaHCO3 and a minimal quantity of EtOAc led to the production of di-