By using HPLC with reductive electrochemical detection, it was shown that 1-naphthol is converted to naphthoquinone metabolites by rat liver microsomes. At least two metabolic pathways, independent of cytochrome p450, appear to be involved. Fe-dependent lipid peroxidation appears to be responsible for at least part of the conversion of 1-naphthol to predominantly 1,4-naphthoquinone, and it seems likely that superoxide anion radical generation by NADPH-cytochrome p450 reductase could also catalyze this conversion. 1-Naphthol therefore seems to be converted to cytotoxic naphthoquinone metabolites by mechanisms dependent upon the generation of free radicals in rat liver microsomes.
Carbonyl reductase, ... a cytosolic monomeric oxidoreductase of broad specificity for carbonyl compounds, was the main NADPH-dependent quinone reductase in human liver, whereas DT-diaphorase, the principal 2-electron-transferring quinone reductase in rat liver, contributed a very minor part to the quinone reductase activity of human liver. Carbonyl reductase provides the enzymic basis for the reduction of a great variety of natural and man-made quinones. Generally, oxo groups at chemically reactive positions (K-region) were more efficiently reduced than those at more inert positions. The best substrates were the K-region o-quinones of the polycyclic aromatic hydrocarbons phenanthrene, pyrene, benz(a)anthracene, and benzo(a)pyrene. ... non-K-region o-quinones, 1,2-naphthoquinone and 1,2-anthraquinone ... were the best substrates. ...
来源:Hazardous Substances Data Bank (HSDB)
毒理性
致癌物分类
对人类无致癌性(未列入国际癌症研究机构IARC清单)。
No indication of carcinogenicity to humans (not listed by IARC).
来源:Toxin and Toxin Target Database (T3DB)
毒理性
暴露途径
该物质可以通过吸入和摄入被身体吸收。
The substance can be absorbed into the body by inhalation and by ingestion.
来源:ILO-WHO International Chemical Safety Cards (ICSCs)
毒理性
吸入症状
咳嗽。喉咙痛。灼热感。
Cough. Sore throat. Burning sensation.
来源:ILO-WHO International Chemical Safety Cards (ICSCs)
毒理性
皮肤症状
发红。灼热感。疼痛。
Redness. Burning sensation. Pain.
来源:ILO-WHO International Chemical Safety Cards (ICSCs)
毒理性
眼睛症状
红肿。疼痛。视力模糊。
Redness. Pain. Blurred vision.
来源:ILO-WHO International Chemical Safety Cards (ICSCs)
在本文中,描述了一种基于H 2 O 2介导的硼酸酯探针脱保护为氧化还原循环化合物的新分子自催化反应方案,在O 2和还原剂或酶的存在下产生指数信号增益。为此,设计了围绕萘醌/萘氢醌氧化还原活性核构建的新型化学传感探针,并被自消旋的硼酸酯保护基团掩盖。使用这些探针,可以通过使用UV / Visible或荧光光学检测或通过电化学监测获得具有特征性滞后和指数相的典型自催化动力学迹线。浓度低到0.5μ的检测米ħ 2 ö在相对较短的时间内(<1小时)即可获得2和0.5 n m的萘醌衍生物。通过与自动催化相关的两个交叉活化的催化环的动力学分析,确定了控制自动催化反应网络的关键参数,间接表明分析性能目前受到硼酸盐探针缓慢的非特异性自保护作用的限制。总的来说,目前的结果证明了这种新的指数分子扩增策略的潜力,由于其通用的性质和模块性,该方法对于与涉及H 2 O 2的各种生物测定方法的耦合是很有前途的。 或氧化
Metal-, Photocatalyst-, and Light-Free Minisci C–H Alkylation of <i>N</i>-Heteroarenes with Oxalates
作者:Jianyang Dong、Zhen Wang、Xiaochen Wang、Hongjian Song、Yuxiu Liu、Qingmin Wang
DOI:10.1021/acs.joc.9b00972
日期:2019.6.7
for metal-, photocatalyst-, and light-freeMinisciC–Halkylation reactions of N-heteroarenes with alkyl oxalates derived from primary, secondary, and tertiary alcohols. The protocol uses environmentally benign persulfate as a stoichiometric oxidant and does not require high temperatures or large excesses of either of the substrates, making the procedure suitable for late-stage C–Halkylation of complex
Alkyl and alkoxycarbonyl radicals were generated by oxidative decarboxylation of oxalic acid monoesters by persulfate; they were then utilized for the selective substitution of quinones.
草酸单酯被过硫酸盐氧化脱羧生成烷基和烷氧羰基;然后将它们用于醌的选择性取代。
New Drug Delivery System for Crossing the Blood Brain Barrier
申请人:Lipshutz H. Bruce
公开号:US20070203080A1
公开(公告)日:2007-08-30
New ubiquinol analogs are disclosed, as well as methods of using these compounds to deliver drug moieties to the body.
新的泛醌类似物被披露,以及利用这些化合物将药物基团输送到人体的方法。
[4+2]-Cycloaddition reactions employing 2-fluoro-2-alkenal N,N-dimethylhydrazones: synthesis of 3-fluoropyridines and dihydro or tetrahydro derivatives thereof
作者:Somnath Ghosh、Manfred Schlosser
DOI:10.1016/0022-1139(93)02932-5
日期:1994.4
N,N-Dimethylhydrazones prepared from 2-fluoro-2-alkenals undergo smooth [4+2]-cycloaddition reactions with methyl acrylate, dimethyl acetylenedicarboxylates and quinones. The resulting 3-fluoropyridines, or dihydro and tetrahydro derivativesthereof, can be isolated in fair to good yield.
Photoreactive Composition, Reaction Product, and Method of Producing Reaction Product
申请人:Tokyo University of Science Foundation
公开号:US20210253826A1
公开(公告)日:2021-08-19
A photoreactive composition including a base-reactive compound, a photobase generator that is represented by the following Formula (1) and that generates a base when irradiated with light, and at least one compound selected from the group consisting of a polycyclic aromatic compound having a fused ring structure having two or more rings and a polycyclic aromatic compound having three or more aromatic rings and having a conjugated structure including any two or more of the three or more aromatic rings, in which the base-reactive compound is a compound having two or more groups that will have their polarity converted by the action of a base and that exhibit reactivity, in one molecule, or a compound having two or more groups that will react under the action of a base, in one molecule.