24311-40-8

Usage

InChI:InChI=1/C6H6N2O5S/c7-5-3-4(8(9)10)1-2-6(5)14(11,12)13/h1-3H,7H2,(H,11,12,13)

Upstream product

• 10344-04-4 dinitrobenzenesulfenic acid methyl ester 
• 99-09-2 3-nitro-aniline 
• 2004-54-8 2,4-dinitrobenzenesulfenyl acetate 
• 7732-18-5 water 
• 528-76-7 2,4-dinitrobenzenesulfenyl chloride 
• 64-19-7 acetic acid 
• 7664-93-9 sulfuric acid 
• 7553-56-2 iodine 
• 2942-07-6 5-nitrobenzothiazole 
• 18998-31-7 2,4-Dinitrobenzolsulfenyl-N-methylanilid 
• 88-63-1 2,4-Diaminobenzenesulfonic acid 

Downstream Products

• 88-63-1 2,4-Diaminobenzenesulfonic acid 
• 62406-72-8 2,4,6-tribromo-3-nitro-aniline 
• 4140-86-7 2-amino-4-nitro-benzenesulfonic acid amide 

Relevant academic research and scientific papers

Surprises in a 'simple' system: 2,4-Diaminobenzenesulfonic acid

The search for the polymorphic forms of 2,4-diaminobenzenesulfonic acid (DBSA), known to exist since 1880, has revealed a surprisingly rich solid-state system for such a simple molecule. A monohydrate, a dimoiric hydrate, an anhydrate and two polymorphic forms of the hydrochloride of this material have thus far been prepared. Their characterization by microscopic and thermal methods, FT-IR spectroscopy, and single-crystal structure determination are described.

The efficient palladium-catalyzed selective t synthesis of benzenesulfonic acids

Palladium-catalyzed synthetic methodology has been developed for the synthesis of 2-aminobenzenesulfonic acids from benzothiazoles in good to excellent yields using chloramine-B in alkaline (pH 12) acetonitrile/water (1:1) at 80C.

Development of an efficient ruthenium catalyzed synthetic process and mechanism for the facile conversion of benzothiazoles to orthanilic acids

Ruthenium-Schiff base complex catalyzed efficient protocol has been developed for the synthesis of orthanilic acids from benzothiazoles in good to excellent yields using N-haloamines. Hexa-coordinated ruthenium complex with Schiff base and triphenylphosphine ligands has been prepared and its catalytic function was invented for the synthesis of orthanilic acids. The synthetic process utilizes our efficient method for the selective and preferential oxidation of thiazole ring of benzothiazoles using N-haloamines without effecting phenyl ring. The detailed catalytic, mechanistic and kinetic investigations have been made for the synthetic reactions. Solvent isotope studies have been made in H2O-D2O and the reactions were carried out at different temperatures. Under the identical set of conditions, the kinetics of catalyzed reactions has been compared with uncatalyzed reactions and found that the catalyzed reactions are 9-11 folds faster. The catalytic constants (KC) have been calculated for each N-haloamine at different temperatures and the values of activation parameters with respect to the catalyst have been evaluated. Spectroscopic evidence for the formation of 1:1 complex between N-haloamine and ruthenium has been obtained. The observed results have been explained by a plausible mechanism and the related rate law has been deduced.

Regio- and chemoselective enzymatic N-oxygenation in vivo, in vitro, and in flow

(Chemical Equation Presented) Action by the para: Evaluation of the nitro-group-forming N-oxygenase AurF in vivo, in vitro, and immobilized as a fusion protein with simply H2O2 as oxidant (peroxide shunt) reveals para-regioselective oxygenation of aromatic amines (see scheme). This effect includes the selective oxygenation of diamino compounds.

Bisazo brown reactive dye

A brown reactive dye represented by a free acid of the formula, STR1 wherein R is a hydrogen atom or a C1 to C4 alkyl group, X is --SO2 CH2 CH2 Cl, --SO2 CH=CH2, --SO2 CH2 CH2 OSO3 H or --SO2 CH2 CH2 OPO3 H2, rings A, B and C are each a benzene or naphthalene ring which may have other substituent, m is 0 to 3 and n is 0 to 1. This dye is suitable for dyeing cellulose fibers brown to afford dyeings superior in fastnesses, acid stability, build-up property and level dyeing property.

Azo dyestuffs

Azo dyestuffs, which in the acid form, are represented by the formula: wherein A is an aromatic radical, M is a 1,4-benzene radical which may be substituted, E is the residue of a coupling component which is free from azo groups, At least one of A and M containing a phosphonic acid group, and the metal complexes of those having a metallisable group are reactive dyes suitable for use in the process of German OLS No. 2324809.