[EN] CYSTEINE, N-ACETYLCYSTEINE AND PENICILLAMINE PRODRUGS, PHARMACEUTICAL COMPOSITIONS THEREOF, AND METHODS OF USE [FR] PROMÉDICAMENTS CYSTÉINE, N-ACÉTYLCYSTÉINE ET PÉNICILLAMINE, LEURS COMPOSITIONS PHARMACEUTIQUES, ET LEURS PROCÉDÉS D'UTILISATION
[EN] CYSTEINE, N-ACETYLCYSTEINE AND PENICILLAMINE PRODRUGS, PHARMACEUTICAL COMPOSITIONS THEREOF, AND METHODS OF USE [FR] PROMÉDICAMENTS CYSTÉINE, N-ACÉTYLCYSTÉINE ET PÉNICILLAMINE, LEURS COMPOSITIONS PHARMACEUTIQUES, ET LEURS PROCÉDÉS D'UTILISATION
Compounds of formula (I) are antibacterial agents wherein: R3 and R4, taken together with the carbon atoms to which they are respectively attached, form an optionally substituted saturated carbocyclic or heterocyclic ring of 5 to 16 atoms, which may be benz-fused or fused to a second optionally substituted saturated carbocyclic or heterocyclic ring of 5 to 16 atoms; and R1 and R2 are as defined in the specification.
d-Pen2,d-Pen5 enkephalin (DPDPE) is one of the most selective synthetic peptideagonists targeting the δ-opioid receptor. Three cyclic analogues of DPDPE containing a xylene bridge in place of disulfide bond have been synthesized and fully characterized as opioid receptors agonists. The in vitro activity was investigated showing a good affinity of 7a-c for μ- and δ-receptors. In vivo biological assays
Novel sulfur-linked squaryl group-containing glutamate analogs were synthesized via addition and mono-substitution reactions of thiols to t-butyl methyl squarate (BMSQ: 7) in two steps. A glutamate analog prepared from Boc-l-Cys showed a potent binding affinity to KA/AMPA receptors.
An efficient methylene insertion reaction to construct an S–CH2–S bridge between two cysteine residues occurred when the thiol-protecting dimethylphosphinothioyl (Mpt) group of Z–Cys(Mpt)–OMe was removed with tetrabutylammonium fluoride hydrate in CH2Cl2. The thiol-free form gave similar results, albeit the yields were somewhat lower. In both cases, the best yields were obtained using 2 molar amounts of the reagent. Higher amounts of the reagent reduced the yield because of dehydroalanine formation. In the case of penicillamine, the thiol-free form was better in reactivity than the S-Mpt form, which required double the amount of the reagent to give the same yield. The reaction was successfully used in a synthesis of a cyclic enkephalin analog with the S–CH2–S bridge.
CYSTEINE, N-ACETYLCYSTEINE, AND PENICILLAMINE RELATED COMPOUNDS, PHARMACEUTICAL COMPOSITIONS THEREOF, AND METHODS OF USE
申请人:Nguyen Mark Quang
公开号:US20170081280A1
公开(公告)日:2017-03-23
Cysteine, N-acetylcysteine, and penicillamine related compounds, pharmaceutical compositions comprising the cysteine, N-acetylcysteine, and penicillamine related compounds, and methods of using cysteine, N-acetylcysteine, and penicillamine related compounds and pharmaceutical compositions thereof for treating liver, kidney, lung, neurological, inflammatory, and autoimmune disorders including paracetamol overdose, non-alcoholic steatohepatitis, Wilson's disease, cystinuria, irritable bowel disorder, ulcerative colitis, rheumatoid arthritis, chronic obstructive pulmonary disease, interstitial lung disease, asthma, cystic fibrosis, Parkinson's disease, and Huntington's disease.