[EN] POLYSUBUNIT OPIOID PRODRUGS RESISTANT TO OVERDOSE AND ABUSE<br/>[FR] PROMÉDICAMENTS D'OPIOÏDES À SOUS-UNITÉS MULTIPLES RÉSISTANTS AUX SURDOSES ET AUX ABUS
申请人:ELYSIUM THERAPEUTICS INC
公开号:WO2018170465A1
公开(公告)日:2018-09-20
The invention provides compositions and methods for the treatment or prevention of pain. Compositions provided are resistant to overdose and abuse. Compositions provided comprise two or more different molecules, where each molecule comprises at least one GI enzyme-labile opioid agonist releasing subunit comprising an opioid agonist that is covalently linked to at least one GI enzyme inhibitor subunit.
Targeting Peptides with an Iron-Based Oxidant: Cleavage of the Amino Acid Backbone and Oxidation of Side Chains
作者:Anil R. Ekkati、Jeremy J. Kodanko
DOI:10.1021/ja075075i
日期:2007.10.1
The oxidation of protected amino acids using an iron-based oxidant is described. Substrates of the general formula Ac-X-NHtBu, where X = Gly (1), Ala (2), Val (3), Phe (4), Tyr (5), Trp (6), and Met (7) were constructed to model individual amino acid residues within a polypeptide chain. Oxidation of 1 by the iron catalyst [FeII(N4Py)(MeCN)](ClO4)2 (8) and KHSO5 leads to scission of the amino acid backbone
At equilibrium in acidic solution the succinimide derivative, formed by cyclization reaction of the Asp side chain, predominates; at a pH close to the apparent pKa of the Asp residue this reaction is relatively fast with a t1/2 of a few days.
在酸性溶液中处于平衡状态时,由Asp侧链的环化反应形成的琥珀酰亚胺衍生物占主导地位。在接近于Asp残基的表观p K a的pH值下,该反应相对较快,几天的t 1/2。
13C-n.m.r.-spectral study of the mode of interaction of Gd3+ and Mn2+ with two vicinally di-O-d-galactosylated tripeptides
作者:Kilian Dill、Marsha E. Daman、Ron L. Batstone-Cunningham、Michel Denarié、André A. Pavia
DOI:10.1016/0008-6215(83)88351-7
日期:1983.12
Abstract Natural-abundance, 13 C-n.m.r. spectroscopy was used to study the binding of Gd 3+ and Mn 2+ to two vicinally di- O -α- and -β- d -galactosylated tripeptides composed of Gly and l -Thr. Gd 3+ and Mn 2+ appear to interact with the α- d -Gal groups of the di- O -α- d -galactosylated tripeptide at two sites: near O-6′, and in the vicinity of O-2′ and Thr O-3. The metal-ion-binding to the β- d
Preparation of N-acetyl, tert-butyl amide derivatives of the 20 natural amino acids
作者:A. R. Ekkati、A. A. Campanali、A. I. Abouelatta、M. Shamoun、S. Kalapugama、M. Kelley、Jeremy J. Kodanko
DOI:10.1007/s00726-009-0279-y
日期:2010.3
N-Acetyl-AA(amino acid)-NHtBu derivatives of all 20 naturally occurring amino acids have been synthesized. Syntheses were performed via solution-phase methodology with yields that allow for access to gram quantities of substrates, in most cases. Syntheses include the coupling of a hindered amine, tert-butylamine, with each amino acid, either directly or in two steps using an activated ester isolated as an intermediate. The introduction of protecting groups was necessary in some cases. The development of synthetic sequences to access challenging substrates, such as the one derived from asparagine, are discussed.