Design and synthesis of new 7,8-dimethoxy-α-naphthoflavones as CYP1A1 inhibitors
摘要:
The flavonoids as inhibitors of CYP1A1 exhibit chemopreventive effects against certain procarcinogens and have been considered as the promising cancer preventive agents. A series of novel 7,8-dimethoxy-alpha-naphthoflavones as the substrate analogs were designed and prepared. The enzyme assay suggested that all of these new flavones were stronger inhibitors of CYP1A1 than the lead compound alpha-naphthoflavone. Among the tested ones, 3h showed the most potent inhibitory effects. (C) 2013 Shao-Shun Li. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
Design and synthesis of new 7,8-dimethoxy-α-naphthoflavones as CYP1A1 inhibitors
摘要:
The flavonoids as inhibitors of CYP1A1 exhibit chemopreventive effects against certain procarcinogens and have been considered as the promising cancer preventive agents. A series of novel 7,8-dimethoxy-alpha-naphthoflavones as the substrate analogs were designed and prepared. The enzyme assay suggested that all of these new flavones were stronger inhibitors of CYP1A1 than the lead compound alpha-naphthoflavone. Among the tested ones, 3h showed the most potent inhibitory effects. (C) 2013 Shao-Shun Li. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
EPR-spektroskopische Untersuchungen am Co-Salen/O2-Komplex, 4. Mitt. Differenzierung der Natur des gebundenen Sauerstoffs
作者:Hans-Jürgen Duchstein、Martin Baumgarten
DOI:10.1002/ardp.19883211103
日期:——
in Acetonitril eine EPR‐Inaktivität durch Auftreten des Co‐Salen‐Dimers erklärt. Außerdem zeigt sich, daß Co‐Salen vom Substrat abhängig Sauerstoff in verschiedenen reaktive Zustände aktivieren kann, so daß 1. Singulett‐Sauerstoff‐ähnliche (4+2)‐Cycloadditionen mit 1,5‐Dihydroxy‐naphthalin (1) und 2. Radikalreaktionen mit 2,6‐Di‐tert.‐butylphenol (4) möglich sind. Die Messungen ergänzen die bereits beschriebenen
Zum Singulett-Charakter von komplexgebundenem Sauerstoff, 2. Mitt.
作者:Hans-Jürgen Duchstein
DOI:10.1002/ardp.19873200515
日期:——
Die Oxygenierungsreaktionen von 1,5‐Dihydroxynaphthalin (1) und 2,6‐Ditert.‐butylphenol (4) mit Co‐Salen als Katalysator wurden untersucht. Die Natur des aktivierten Sauerstoffs innerhalb dieser Synthesen ist unterschiedlich. Mit Hilfe von spezifischen Quenchreaktionen und Messung der ultraschwachen Chemolumineszenz wurde festgestellt, daß Co‐Salen in der Lage ist, Sauerstoff je nach Substrat sowohl in
Teuber; Goetz, Chemische Berichte, 1954, vol. 87, p. 1236,1250
作者:Teuber、Goetz
DOI:——
日期:——
An Efficient Synthesis of 5,6-Dimethoxy 1- and 2-Naphthols<i>via</i>Teuber Reaction
作者:Jia-hua Cui、Shao-shun Li
DOI:10.1002/jccs.201300065
日期:2013.9
AbstractBased on the oxidation of 1,5‐naphthalenediol (4) and 6‐bromo‐2‐naphthol (9) via Teuber reaction, an efficient synthesis of 5,6‐dimethoxy‐1‐naphthol (1) and 5,6‐dimethoxy‐2‐naphthol (2) was achieved with high overall yield (16% for 1 and 25% for 2). The key steps of the synthetic strategy involved the oxidation of naphthols (4 and 9) to the corresponding naphthoquinones (5 and 10) and the conversion of 5,6‐dimethoxy‐2‐naphthaldehyde to 5,6‐dimethoxy‐2‐naphthol formate through Baeyer‐Villiger oxidation‐rearrangement.