diazo-coupling reaction重氮-偶合反应 1.A nonlinear chromophore containing azo group,1-n-butoxy-2,5-dimethyl-4-(4′-nitrophenyl-azo)benzene,was synthesized with 4-nitroaniline,sodium nitrite,2,5-dimethylphenol and n-butyl bromide via diazo-coupling reaction.以对硝基苯胺、亚硝酸钠、2,5-二甲基苯酚...
Diazo-coupling reactions of the pendant aniline residue were examined with phenol and resorcinol, and the formation of desired polymers was confirmed by comparing the structures between the polymer products and the authentic polymers by IR and 1 H-NMR spectroscopy....
The azo-coupling reaction between 1-naphthol and diazotized aniline in alkaline media has been studied. It is shown that the product distribution is mixing-dependent. Reaction is rapid, and the kinetically controlled regime is reached only at high stirrer speeds....
Monoazo dyes - by coupling diazotised 3-amino indazoles with substd anilines and cyclisingThe dyes are of formula: (in which R1 is H or opt. substd. lower alkyl, and R2 is as R1 or aryl, or together with R1 or with ring B forms a heterocyclic ring. Rings A and B may carry ...
(6.0 mL) were injected respectively into the tube via syringes. The reaction mixture was stirred and electrolyzed at a constant current of 10 mA for 5 h at 50 °C. The reaction mixture was washed with water and extracted with EA (10 mL × 3). The organic layers were ...
(NaNO2)andHCl.ThisreactioninvolvesattackofNO+atthearomaticnitrogen,followedbyeliminationofwater.NH2SO3NaNSO3-N++NaNO2+2HCl0-5oC+2H2O+2NaCldiazoniumsalt(3)Diazocoupling:Thediazoniumsaltproducedbythisprocessisnotpurifiedbutisreactedwiththecouplingreagent.Inthiscase,thediazoniumsaltisreactedwithN.N-...
Still further, they exhibit a novel and unexpected effect of promoting selectively the coupling reaction between the heat-transferred coupler and diazonium salt contained in the photosensitive layer. The reason why they exhibit such peculiar effect has not been elucidated completely, but it is ...
This method is based on the diazotization-coupling reaction of saforian O with nitrite ion in H_2SO_4 medium can result in a sensitive absorption at 518 nm and 348 nm. 在硫酸介质中,亚硝酸根与水溶性番红花红O发生重氮化偶联反应,在518 nm和348 nm处产生灵敏的吸收峰,根据两波长处吸...
diazotization-coupling methodp-aminoacetophenone-N-(1-naphthyl)ethylenediamineA sensitive spectrophotometric method for the determination of nitrite is worked out. It depends on the reaction of the intended ion with an acidified p-aminoacetophenone solution to form a diazonium cation, which is ...
6 Claims. (Cl 1 The present invention relates to diazotype 1 prints, to the light-sensitive materials utilized i in the production thereof, and more particularly to the azo or coupling components capa