Metal-Free-Mediated Oxidation Aromatization of 1,4-Dihydropyridines to Pyridines Using Visible Light and Air
作者:Xiaojing Wei、Lin Wang、Wenliang Jia、Shaofu Du、Lizhu Wu、Qiang Liu
DOI:10.1002/cjoc.201400521
日期:2014.12
A metal‐free and environmentally friendly aerobic aromatization photosensitized by organic dye eosin Y bis(tetrabutyl ammonium salt) (TBA‐eosinY) has been developed. With the aid of K2CO3, the aerobic catalytic system converts 1,4‐dihydropyridines to their corresponding pyridine derivatives efficiently under visiblelight irradiation (λ=450 nm) at room temperature.
已经开发了一种无金属且环保的需氧芳香化方法,该方法通过有机染料曙红Y双(四丁基铵盐)(TBA-曙红Y)进行光敏。借助于K 2 CO 3,好氧催化系统在室温下在可见光照射下(λ = 450 nm)将1,4-二氢吡啶有效地转化为其相应的吡啶衍生物。
Reactivity of C4-indolyl substituted 1,4-dihydropyridines toward superoxide anion (O<sub>2</sub>•) in dimethylsulfoxide
作者:Ricardo Salazar、P. A. Navarrete-Encina、J. A. Squella、C. Camargo、Luis J. Núñez-Vergara
DOI:10.1002/poc.1453
日期:2009.6
Reactivity of two new C4‐indolyl substituted 1,4‐dihydropyridines (1,4‐DHPs) towardsuperoxideanion (O2•) in dimethylsulfoxide (DMSO) is reported. Reactivity was followed by electrochemical and spectroscopic techniques. Gas chromatography‐mass spectrometry (GC–MS) was used to identify the final products of the reaction. C4 indolyl‐substituted‐1,4‐DHPs reacted towardO2• at significant rates, according
Reactivity of 1,4-Dihydropyridines toward Alkyl, Alkylperoxyl Radicals, and ABTS Radical Cation
作者:C. López-Alarcón、P. Navarrete、C. Camargo、J. A. Squella、L. J. Núñez-Vergara
DOI:10.1021/tx025579o
日期:2003.2.1
tested for potential scavenger effects towardalkyl, alkylperoxyl radicals, and ABTS radical cation in aqueous media at pH 7.4. Kinetic rate constants were assessed either by UV/vis spectroscopy or GC/MS techniques. Tested compounds reacted faster toward alkylperoxyl radicals and ABTS radical cation than alkyl ones. N-Ethyl-substituted DHPs showed the lowest reactivity. Kinetic results were compared with
Oxidation of 4-aryl- and 4-alkyl-substituted 2,6-dimethyl-3,5-bis(alkoxycarbonyl)-1,4-dihydropyridines by human liver microsomes and immunochemical evidence for the involvement of a form of cytochrome P-450
作者:Ronald H. Boecker、F. Peter Guengerich
DOI:10.1021/jm00159a007
日期:1986.9
lost; these compounds also inactivated cytochromeP-450 and caused the loss of nifedipine oxidase activity after enzymaticoxidation. All of these reactions were extensively inhibited by an antibody raised to purified human liver nifedipine oxidase cytochromeP-450 (P-450NF), indicating a major role for this enzyme in the oxidation of these compounds. Oxidation of the 4-alkyl compounds led not only