55581-64-1Relevant articles and documents
Exceptional Substrate Diversity in Oxygenation Reactions Catalyzed by a Bis(μ-oxo) Copper Complex
Paul, Melanie,Teubner, Melissa,Grimm-Lebsanft, Benjamin,Golchert, Christiane,Meiners, Yannick,Senft, Laura,Keisers, Kristina,Liebh?user, Patricia,R?sener, Thomas,Biebl, Florian,Buchenau, S?ren,Naumova, Maria,Murzin, Vadim,Krug, Roxanne,Hoffmann, Alexander,Pietruszka, J?rg,Ivanovi?-Burmazovi?, Ivana,Rübhausen, Michael,Herres-Pawlis, Sonja
supporting information, p. 7556 - 7562 (2020/05/29)
The enzyme tyrosinase contains a reactive side-on peroxo dicopper(II) center as catalytically active species in C?H oxygenation reactions. The tyrosinase activity of the isomeric bis(μ-oxo) dicopper(III) form has been discussed controversially. The synthesis of bis(μ-oxo) dicopper(III) species [Cu2(μ-O)2(L1)2](X)2 ([O1](X)2, X=PF6?, BF4?, OTf?, ClO4?), stabilized by the new hybrid guanidine ligand 2-{2-((dimethylamino)methyl)phenyl}-1,1,3,3-tetramethylguanidine (L1), and its characterization by UV/Vis, Raman, and XAS spectroscopy, as well as cryo-UHR-ESI mass spectrometry, is described. We highlight selective oxygenation of a plethora of phenolic substrates mediated by [O1](PF6)2, which results in mono- and bicyclic quinones and provides an attractive strategy for designing new phenazines. The selectivity is predicted by using the Fukui function, which is hereby introduced into tyrosinase model chemistry. Our bioinspired catalysis harnesses molecular dioxygen for organic transformations and achieves a substrate diversity reaching far beyond the scope of the enzyme.
New phenylaniline derivatives as modulators of amyloid protein precursor metabolism
Gay, Marion,Carato, Pascal,Coevoet, Mathilde,Renault, Nicolas,Larchanché, Paul-Emmanuel,Barczyk, Amélie,Yous, Sa?d,Buée, Luc,Sergeant, Nicolas,Melnyk, Patricia
, p. 2151 - 2164 (2018/03/23)
The chloroquinoline scaffold is characteristic of anti-malarial drugs such as chloroquine (CQ) or amodiaquine (AQ). These drugs are also described for their potential effectiveness against prion disease, HCV, EBV, Ebola virus, cancer, Parkinson or Alzheimer diseases. Amyloid precursor protein (APP) metabolism is deregulated in Alzheimer's disease. Indeed, CQ modifies amyloid precursor protein (APP) metabolism by precluding the release of amyloid-beta peptides (Aβ), which accumulate in the brain of Alzheimer patients to form the so-called amyloid plaques. We showed that AQ and analogs have similar effects although having a higher cytotoxicity. Herein, two new series of compounds were synthesized by replacing 7-chloroquinolin-4-amine moiety of AQ by 2-aminomethylaniline and 2-aminomethylphenyle moieties. Their structure activity relationship was based on their ability to modulate APP metabolism, Aβ release, and their cytotoxicity similarly to CQ. Two compounds 15a, 16a showed interesting and potent effect on the redirection of APP metabolism toward a decrease of Aβ peptide release (in the same range compared to AQ), and a 3–10-fold increased stability of APP carboxy terminal fragments (CTFα and AICD) without obvious cellular toxicity at 100 μM.
N-CARBOMETHOXY-N-METHOXY-(2-CHLOROMETHYL)-ANILINES, THEIR PREPARATION AND THEIR USE AS PRECURSORS FOR PREPARING 2-(PYRAZOL-3'-YLOXYMETHYLENE)-ANILIDES
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Page/Page column 29-30, (2011/10/10)
The present invention relates to N-carbomethoxy-N-methoxy-(2-chloromethyl)-aniline compounds of the formula I, wherein: n is 0, 1, 2 or 3, each R1 is independently selected from halogen, C1-C4-alkyl, C1-C4-haloalkyl, C1-C4- alkoxy or C1-C4-haloalkoxy. The invention also relates to processes and intermediates for preparing such compounds of formula I. The invention furthermore relates to processes for preparing 2-(pyrazol-3'-yloxymethylene)-anilides in which compounds of formula I are applied as precursors.
