Phenylhydrazine
... is the chemical compound with the formula C6H5NHNH2. It is often abbreviated as PhNHNH2. It is also found in ... Phenylhydrazine forms monoclinic prisms that melt to an oil around room temperature which may turn yellow to dark red upon ... Phenylhydrazine is used to form phenylhydrazones of natural mixtures of simple sugars in order to render the differing sugars ... Phenylhydrazine is prepared by oxidizing aniline with sodium nitrite in the presence of hydrogen chloride to form the diazonium ...
Pyrazole
4, p. 351 Knorr, L. (1883). "Action of ethyl acetoacetate on phenylhydrazine. I". Chemische Berichte. 16: 2597-2599. doi: ...
1875 in science
Phenylhydrazine is discovered by Hermann Emil Fischer. Swiss chocolatier Daniel Peter working with Henri Nestlé's company ...
Hydrazines
Phenylhydrazine was used to study the structure of carbohydrates, because the reaction of the sugar's aldehyde groups lead to ... phenylhydrazine, C6H5NHNH2, the first hydrazine to be discovered. Nič, Miloslav; Jirát, Jiří; Košata, Bedřich; Jenkins, Aubrey ... Phenylhydrazine and 2,4-dinitrophenylhydrazine have were used historically in analytical chemistry to detect and identify ... The reduction of benzenediazonium chloride with tin(II) chloride and hydrochloric acid provides phenylhydrazine. 2,4- ...
Fischer indole synthesis
Isotopic labelling studies show that the aryl nitrogen (N1) of the starting phenylhydrazine is incorporated into the resulting ... The reaction of a (substituted) phenylhydrazine with a carbonyl (aldehyde or ketone) initially forms a phenylhydrazone which ... Triptan synthesis Iprindole synthesis (phenylhydrazine + suberone → 2,3-Cycloheptenoindole). Bartoli indole synthesis Japp- ... phenylhydrazine and an aldehyde or ketone under acidic conditions. The reaction was discovered in 1883 by Emil Fischer. Today ...
Richard Tecwyn Williams
The metabolism of phenylhydrazine and some phenyl-hydrazones". Biochemical Journal. 70 (4): 688-697. doi:10.1042/bj0700688. PMC ...
Agaritine
It is an α-aminoacid and a derivative of phenylhydrazine. Agaritine is present as a natural phytochemical in fresh samples of ...
Phenicarbazide
It is also obtained from the reaction of phenylhydrazine with urea. Phenicarbazide is a flammable, hard to ignite, crystalline ... Phenicarbazide can be obtained by mixing phenylhydrazine with acetic acid in aqueous solution with the addition of potassium ...
Carbazole
In the first step, phenylhydrazine is condensed with cyclohexanone to the corresponding imine. The second step is a ...
Nucleophile
Nitrogen nucleophiles include ammonia, azide, amines, nitrites, hydroxylamine, hydrazine, carbazide, phenylhydrazine, ...
Diketene
For example pyrazolones are formed from substituted phenylhydrazines, they were used as analgetics but are now largely obsolete ...
Julius Schäffer
Kileci-Ksoll R, Winklhoer C, Steglich W (2010). "Synthesis of schaefferals A and B, unusual phenylhydrazine derivatives from ...
Friedrich Jung (pharmacologist)
In this context he also undertook research into the effects of Phenylhydrazine and other Hemotoxins. Within the German ...
Chemical test in mushroom identification
Kileci-Ksoll R, Winklhoer C, Steglich W (2010). "Synthesis of schaefferals A and B, unusual phenylhydrazine derivatives from ...
Dithizone
... may be prepared by reacting phenylhydrazine with carbon disulfide, followed by reaction with potassium hydroxide. ...
Skatole
Emil Fischer (1886) "Indole aus Phenylhydrazin" (Indole from phenylhydrazine), Annalen der Chemie, vol. 236, pages 126-151; for ...
Erythropoietin receptor
These mice are anemic and show poor response to hypoxic stress, such as phenylhydrazine treatment or erythropoietin injection. ...
Phenidone
It converts to the N-phenyl-hydroxypyrazole: Phenidone can be prepared by heating phenyl hydrazine with 3-chloropropanoic acid ...
Tetraphenylmethane
Gomberg's classical organic synthesis shown below starts by reacting triphenylmethyl bromide 1 with phenylhydrazine 2 to the ...
Isocitrate lyase
For example, glyoxylate can be reacted with phenylhydrazine to form hydrazone that can be analysed by UV/vis spectroscopy. ...
Formazan
For example, ethyl formate or orthoformate reacts with two equivalents of phenylhydrazine to yield 1,5-diphenylformazan, under ...
Pyrazolone
... via a condensation reaction between ethyl acetoacetate and phenylhydrazine. Many pyrazolones are produced by functionalization ...
Liver angiosarcoma
Exposure to vinyl chloride, arsenic, thorotrast, radium, phenylhydrazine and use of androgens is known to contribute to the ...
Dihydroxymalonic acid
... and also combines with phenylhydrazine and hydroxylamine. It reduces ammoniacal silver solutions. When heated with urea to 100 ...
Osazone
... of carbohydrate derivatives found in organic chemistry formed when reducing sugars are reacted with excess of phenylhydrazine ...
Triazofos
Another method produces the substance by the reaction of phenylhydrazine with Sodium cyanate, formamide and O,O-diethyl ...
Hydrazone
Phenylhydrazine reacts with reducing sugars to form hydrazones known as osazones, which was developed by German chemist Emil ...
Sigmatropic reaction
... phenylhydrazine and an aldehyde or ketone under acidic conditions. The reaction was discovered in 1883 by Hermann Emil Fischer ...
Pyridazine
Emil Fischer prepared the first pyridazine via the condensation of phenylhydrazine and levulinic acid. The parent heterocycle ...
Metamizole
In the 1880s, Knorr was trying to make quinine derivatives from phenylhydrazine, and instead made a pyrazole derivative, which ...