32816-66-3Relevant academic research and scientific papers
A two-step oxidative aromatic substitution of hydrogen as a convenient way to 2-nitrodiarylamines
Wróbel, Zbigniew,Gulko, Cezary,Plichta, Karolina,Kwast, Andrzej
, p. 8252 - 8260 (2016/12/02)
A method for the synthesis of differently substituted 2-nitrodiarylamines via nucleophilic substitution of hydrogen in nitroarenes is described. In the two-step procedure, the first step omits classical substitution of halogens in starting nitroarenes and occurs efficiently at the position ortho to the activating group. Subsequent oxidation of the 2-nitrosoanilines so formed is accomplished with a cheap and environmentally friendly reagent, sodium perborate, under mild conditions. In exceptional cases of the amine-substituted nitrosoanilines, more selective oxidant (IBX) is required.
Simple synthesis of N-aryl-2-nitrosoanilines in the reaction of nitroarenes with aniline anion derivatives
Wrobel, Zbigniew,Kwast, Andrzej
experimental part, p. 3865 - 3872 (2010/12/25)
Anions generated from primary arylamines react with substituted nitrobenzenes to form H-adducts, which, under basic reaction conditions, undergo transformation to N-aryl-2-nitroso?amines. Competitive substitution of reactive halogens in the nit
RECEPTOR FUNCTION REGULATING AGENT
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Page/Page column 42, (2010/11/28)
The present invention relates to a GPR40 receptor function regulator comprising a fused imidazole compound represented by the formula: wherein each symbol is as defined in the specification, or a salt thereof or a prodrug thereof. The GPR40 receptor funct
Control of parasites in animals by N-[(phenyloxy)phenyl]-1,1,1-trifluoromethanesulfonamide and N-[(phenylsulfanyl)phenyl]-1,1,1-trifluoromethanesulfonamide derivatives
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Page/Page column 38, (2008/06/13)
Methods for treating an animal for endo and/or ecto parasite infestation and/or for protecting an animal from endo and/or ecto parasite infestation using N-phenyl-1,1,1-trifluoromethanesulfonamide compounds are provided, together with methods of making th
Heavy-Atom Kinetic Isotope Effects and Mechanism of the Acid-Catalyzed o-Semidine and p-Semidine Rearrangements and Disproportionation of 4,4'-Dichlorohydrazobenzene
Rhee, Eun Sook,Shine, Henry J.
, p. 1000 - 1006 (2007/10/02)
In acidic 60percent aqueous dioxane solution at 0 deg C, 4,4'-dichlorohydrazobenzene (18) undergoes concurrent disproportionation, to p-chloroaniline (19) and 4,4'-dichloroazobenzene (20), and o- (21) and p-semidine (22) rearrangement.In the p-semidine rearrangement one of the chlorine atoms of 18 is displaced, in essence, as Cl+.This requires participation of a second molecule of 18 in a redox reaction.The overall fate of 18, therefore, is to give 11percent o- and 12percent p-semidine rearrangement (along with 12percent of 20) and 60percent disproportionation, accounting for 95percent of the 18.Nitrogen and carbon kinetic isotope effects (KIE) have been determined for each of these reactions, using 18, 18, 18, and 18.Isotope ratios were obtained, measured on the trifluoroacetyl derivatives of 19, 21, and 22, with a combination of scintillation counting, whole-molecule-ion mass spectrometry (WMIMS), and isotope-ratio mass spectrometry (IRMS).Nitrogen KIE were obtained by WMIMS for two 15N atoms in disproportionation (1.0260) and p-semidine rearrangement (1.0282) and by IRMS for one (naturally abundant) 15N atom in disproportionation (1.0141) and o-(1.0155) and p-semide (1.0162) rearrangement. 13C (IRMS) and 14C KIE were measured for all reactions, but in no case was a KIE other than, effectively, unity obtained.These results show that o-semidine formation from 18 complies with exceptations of sigmatropic shifts; that is, that this 1,3-sigmatropic shift is not a concerted process.The results suggest that, although a concerted 1,5-sigmatropic shift is possible, the p-semidine rearrangement of 18 is not characterized by one.It this case, however, a firm decision is not possible.Finally, the results indicate that disproportionation involves one (or both) of the two semidine rearrangement intermediates.The most likely one is that of the p-semidine.Rapid redox reaction of this intermediate (26), formed in the rate-determining step, with a second molecule of 18 can then lead to the p-semidine by removal of Cl+ and to disproportionation by scission of the central C-C bond of the intermediate.These paths account for the distribution of the products formed and the KIE of their formation.
