2,4-Dinitrophenol (2,4-DNP), 2,5-dinitrophenol (2,5-DNP), 2,6-dinitrophenol (2,6-DNP) were compared with respect to stimulation of ventilation and oxygen consumption. In all experiments, 3-4 mg/kg of 1 dinitrophenol isomer was administered to chloralose anesthetized dogs by intraarterial infusion. ... 2,5-DNP elicited small increments in both ventilation and oxygen consumption.
A study was made of the distribution of glutathione-S-transferase activity toward various nitro compounds in monkey tissues and the action of a purified monkey liver glutathione-S-transferase toward various nitro compounds including carcinogenic substances. The liver, kidney and small intestine demonstrated particularly high levels of activity when compounds such as 4-nitroquinoline-N-oxide (56575), 5-nitrofurfural-diacetal and o-dinitrobenzene (99650) were used as substrates. Fifty-two nitro compounds, including 19 nitrofuran derivatives, were also used to test the nitrite releasing activity of the major enzyme purified from rhesus-monkey. The purified enzyme showed activity only toward o-dinitrobenzene, 4-nitroquinoline-N-oxide, 3,4-dinitrobenzoic-acid (528450), p-dinitrobenzene (100254), 2,5-dinitrobenzoic-acid (610286), 2,5-dinitrophenol (329715), tetra-chloronitrobenzene, and 2,4-dinitrobenzoic-acid (610300) of the 33 nitro compounds other than nitrofuran derivatives which were tested as substrates.
Occupational hepatotoxin - Secondary hepatotoxins: the potential for toxic effect in the occupational setting is based on cases of poisoning by human ingestion or animal experimentation.
Nephrotoxin - The chemical is potentially toxic to the kidneys in the occupational setting.
Methemoglobinemia - The presence of increased methemoglobin in the blood; the compound is classified as secondary toxic effect
Other Poison - Uncoupler
Dermatotoxin - Skin burns.
来源:Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
The relative potencies of the 6 dinitrophenols in uncoupling phosphorylation in rat liver mitochondria were in declining order 3,5-dinitrophenol, 2,4-dinitrophenol 2,6-dinitrophenol and 3,4-dinitrophenol and 2,3-dinitrophenol and 2,5-dinitrophenol. The relative potency of these phenolic compounds may be determined primarily by their ability to cross a boundary membrane and to bind to a cationic site on a protein normally associated with energy-conservation, rather than merely by their relative acidity or lipid solubility.
Immediate first aid: Ensure that adequate decontamination has been carried out. If patient is not breathing, start artificial respiration, preferably with a demand-valve resuscitator, bag-valve-mask device, or pocket mask, as trained. Perform CPR as necessary. Immediately flush contaminated eyes with gently flowing water. Do not induce vomiting. If vomiting occurs, lean patient forward or place on left side (head-down position, if possible) to maintain an open airway and prevent aspiration. Keep patient quiet and maintain normal body temperature. Obtain medical attention. /Dinitrophenol and Related Compounds/
Basic treatment: Establish a patent airway (oropharyngeal or nasopharyngeal airway, if needed). Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if necessary. Administer oxygen by nonrebreather mask at 10 to 15 L/min. Monitor for shock and treat if necessary ... . Monitor for pulmonary edema and treat if necessary ... . Anticipate seizures and treat if necessary ... . For eye contamination. flush eyes immediately with water. Irrigate each eye continuously with 0.9% saline (NS) during transport ... . Do not use emetics. For ingestion, rinse mouth and administer 5 ml/kg up to 200 ml of water for dilution if the patient can swallow, has a strong gag reflex, and does not drool. Administer activated charcoal ... . Cover skin burns with dry sterile dressings after decontamination ... . Rapid body cooling may be necessary in case of hyperthermia. Salicylates are contraindicated. /Dinitrophenol and Related Compounds/
Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious, has severe pulmonary edema, or is in severe respiratory distress. Positive-pressure ventilation techniques with a bag valve mask device may be beneficial. Consider drug therapy for pulmonary edema ... . Monitor cardiac rhythm and treat arrhythmias if necessary ... . Start IV administration of 0.9% saline (NS) or lactated Ringer's (LR) /SRP: "To keep open", minimal flow rate/. For dehydration and hypotension with signs of hypovolemia, administer fluid cautiously. Consider vasopressors if patient is hypotensive with a normal fluid volume. Watch for signs of fluid overload ... . Treat seizures with diazepam or lorazepam ... . Administer 1% solution methylene blue if patient is symptomatic with severe hypoxia, cyanosis, and cardiac compromise not responding to oxygen. ... . Use proparacaine hydrochloride to assist eye irrigation ... . /Dinitrophenol and Related Compounds/
/The investigators/ ... studied the pharmacokinetics of ... dinitrophenol isomers /incl 2,5-dinitrophenol/ and showed that elimination from the blood of mice, rabbits, guinea pigs, rats, and monkeys was complete within 30 hr.
Absorption of dinitro compounds can take place with ease through the lungs, the gut, or the intact skin. The rate of absorption through skin is likely to be greater when the substances are applied in oily rather than aq soln. /Dinitro cmpd/
... Dinitro compounds are persistent yellow dye-stuffs, staining exposed skin, hair, wool, fur, and feathers a distinct yellow or orange color which remains obvious for weeks or even months afterwards, despite the action of water and weather. Such staining provides evidence of at least external contact with the chemicals. /Dinitro cmpd/
Switchable Bifunctional Bistate Reusable ZnO–Cu for Selective Oxidation and Reduction Reaction
作者:Kasturi Sarmah、Subhamoy Mukhopadhyay、Tarun K. Maji、Sanjay Pratihar
DOI:10.1021/acscatal.8b03785
日期:2019.1.4
copper loaded zinc oxide (ZnO–Cu) for its stimuli (O2/light) responsiveswitchable performance between its reduced (S-1) and oxidized (S-2) state for two antagonistic reactions, namely oxidation of alkyl arenes/heteroarenes to aldehydes/ketones and reduction of nitro arenes/heteroarenes to corresponding amines. The two states of the catalyst showed its switchable performance as highly active and poorly
在这里,我们公开了利用铜负载的氧化锌(ZnO-Cu)在两个还原反应(即氧化)的还原(S-1)和氧化(S-2)状态之间的刺激(O 2 /光)响应可转换性能。将烷基芳烃/杂芳烃还原为醛/酮,并将硝基芳烃/杂芳烃还原为相应的胺。催化剂的两种状态均显示出其可切换的性能,即用于氧化和还原的高活性和低活性催化剂,并且通过改变刺激(光和O 2 / N 2),两个反应都可以“关闭”和“打开”。)。发现状态之间的转换效率及其相对反应性在各种反应条件下均保持一致,并且无论氧化还原顺序(反之亦然)和反应中使用的底物如何,都保持不变。光催化剂(S-1和S-2)表现出良好的催化活性,多种可重复使用性,广泛的底物范围以及对两种反应均具有合理的官能团耐受性,并在大规模应用中探索了其质量性能。该系统被用于辅助串联催化装置中,用于通过催化状态之间的刺激响应切换而利用氧化和还原反应两者来合成苄胺。
A Convenient Method to Aniline Compounds Using Microwave-Assisted Transfer Hydrogenation
The reduction of mononitro and dinitro aromatic compounds to their aniline analogues using microwave-assisted transfer hydrogenation has been demonstrated. The optimised conditions used, with some examples, are described herein.
Base catalysis in nucleophilic aromatic substitution reactions: evidence for cyclic transition state mechanism over the dimer mechanism in a non-polar aprotic solvent
作者:Olayinka Banjoko、Chike Ezeani
DOI:10.1039/p29860000531
日期:——
The reactions of X-phenyl 2,4,6-trinitrophenylethers [X = 2-NO2, 3-NO2, 4-NO2, 2,4-(NO2)2, 3,4-(NO2)2, 2,5-(NO2)2, and 2,6-(NO2)2] with aniline in benzene display three distinct mechanisms even though all except the 2,6-dinitrophenyl ether are base catalysed. The catalysis of the mononitro-substituted ethersinvolves two aniline molecules and proceeds at a temperature-independent rate in the temperature
The Alkaline Hydrolysis of Aryl (2<i>E</i>)-3-(4‘-Hydroxyphenylazo)propenoates. A Kinetic Study
作者:Giorgio Cevasco、Daniele Vigo、Sergio Thea
DOI:10.1021/jo015795m
日期:2001.11.1
alkaline hydrolysis of the title esters, possessing three conjugated pi units between the internal nucleophile (the hydroxyl group) and the reaction center, follows an E1cBmechanism involving the participation of an "extra extended" p-oxo azoketene type intermediate. For the hydrolysis of the 2,4-dinitrophenyl ester kinetic data, activation parameters and trapping of the intermediate are consistent with
Occurrence of an Elongated <i>p</i>-Oxo Ketene Intermediate in the Dissociative Alkaline Hydrolysis of Aryl (2<i>E</i>,4<i>E</i>)-5-(4‘-Hydroxyphenyl)pentadienoates
作者:Giorgio Cevasco、Daniele Vigo、Sergio Thea
DOI:10.1021/jo0008439
日期:2000.11.1
The alkaline hydrolysis of title esters possessing acidic leaving groups follows an E1cB mechanism involving the participation of an "extra extended" p-oxo ketene intermediate. For the hydrolysis of the 2,4-dinitrophenyl ester kinetic data, activation parameters and trapping of the intermediate clearly indicate that the dissociative pathway carries the reaction flux. Break in the Bronsted plot of the