Diamino phenol

Martin [32] found that dinitrophenol undergoes in the body a partial reduction either to 2-amino-4-nitrophenol or to 4-amino-2-nitrophenol Mid 2,4-diamino-phenol. Part of the compound is excreted unchMiged in the wine. 

USE Manuf dyes, diamino phenol, etc wood preservative insecticide also as indicator. pH range 2.6 colorless, 4.4 yellow as a reagent for the detection of potassium and ammonium ions. 

Figure 10.7 Zn complexes featuring half-SALEN and diamino-phenolate ligands.

Direct YeUow 4 (Cl 24890) (11) is the most familiar dye made from tetra2oti2ed 4,4 -diamino-2,2 -stilbenedisulfonic acid [57153-16-9] (7) and phenol. 

Cl Disperse Violet 26 is prepared by the reaction of l,4-diamino-2,3-dichloroanthraquinone (Cl Disperse Violet 28 (35)) with potassium phenoxide in phenol as a solvent at high temperature. Introduction of phenoxy groups into the 2,3-position shifts the shade to bright, reddish violet and improves the lightfastness and sublimation resistance. 

The 12-membered macrocyclic triamine bearing a phenol pendent (591) was synthesized by one-pot annealation from coumarin and l,7-diamino-4-azaheptane. Upon coordination to Ni, the pendent phenol readily dissociates its proton at acidic pH and becomes a strong fourth donor.1506... 

A suitable example is Cl Acid Blue 27 (6.37 X = NHCH3), which is made from 4-bromo-l-methylaminoanthraquinone by nucleophilic displacement followed by sulphonation. Some commercial acid dyes based on 1,4-diaminoanthraquinone contain substituents in both the 2- and the 3-positions. Thus, for example, Cl Acid Violet 41 (6.38) is produced by the condensation of l,4-diamino-2,3-dichloroanthraquinone with phenol in the presence of sodium sulphite and manganese dioxide. 

Horseradish peroxidase (HRP) an enzyme routinely used in immunohisto-chemistry for labeling antibodies. Histochemichal detection of peroxidase is based on the conversion of aromatic phenols or amines, such as diamino-benzidine (DAB), into water-insoluble pigments in the presence of hydrogen peroxide (H202). 

Procedures for the synthesis of precursors for acyclic diamino-, aminoxy-, and aminothiocarbenes rely on the condensation of formamides with phenols, thiophe-nols, and amines, respectively (Scheme 3). ... 

Those degradation products which have been identified in our investigations are 1-naphthol from carbaryl, 2,4-D acid and 2,4-dichlorophenol from 2,4-D ester, 2-chloro-2, 6 -diethylacetanilide from alachlor, o,o,oe-trifluro-2-nitro-6-amino-N,N-dipropyl-p-tolu-idine and o,o,o-trifluro-2,6-diamino-N,N-dipropyl-p-toluidine from trifluralin, and a variety of phenols and acids from the degradation of the aromatic solvents used in the formulation of the liquid pesticides as emulsifiable concentrates (41,42). 

Diazotization of 3,7-diaminodibenzothiophene 5,5-dioxide, which has the trivial name of benzidine sulfone, followed by coupling with phenols, anilines, or arylsulfonic acids gives bis-azo dyes varying in color from red-brown to blue. These dyes are useful for the coloring of plastics and cellulose. second class of compounds based on 3,7-diamino-... 

Fig. 18 X-ray structure of (salen)CrCl oxetane, where the salen hgand contains /-butyl substituents in the 3,5-positions of the phenolates, with a phenylene diamino backbone...

Arylazo-Derivate von Chinoxalin, 1,4-Benzothiazin und 1,4-Benzoxazin sind durch Re-aktion von Phenylhydrazono-acetylchlorid mit 1,2-Diamino-benzol, 2-Amino-phenol und 2-Amino-thiophenol zuganglich. Die zunachst gebildeten Hydrazone konnen mit Wasser-stoffperoxid leicht zu den Arylazo-Verbindungen oxidiert werden. Die Ausbeuten fur beide Schritte sind annahernd quantitativ2 ... 

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