Benzophenone-3,3 -disulfonic acid

The synthesis of amines with sulfonic acid groups, 4,4 -bis(4-amino-phenoxy)benzophenone-3,3 -disulfonic acid and 4,4 -bis(4-aminophenyl-thio)benzophenone-3,3 -disulfonic acid starts from 4,4 -dichlorobenzophe-none by sulfonation with sulfuric acid. In the second step, 4-aminophenol is coupled in the presence of anhydrous potassium carbonate. ... 

Bis(4-aminophenoxy)benzophenone-3,3 -disulfonic acid, 496 4,4 -Bis(4-aminophenoxy)biphenyl, 461 4,4 -Bis-(p-aminophenoxy)diphenyl-1,3,4-thiadiazole, 307 Bis[4-(p-aminophenoxy)phenoxy]dimethylsilane, 479 2,2 -Bis[4-(4-amino-phenoxy) phenyl] hexafluoroisopropylidene, 477 1,3-Bis [5 -[3"-(p-aminophenoxy)-pheny 1]-oxadiazol-2-yl]benzene, 307 2,2 -Bis(4-(4-aminophenoxy)phenyl)propane, 477, 487 Bis(aminophenoxy phenyl)-sulfone, 489 B is [4-(3 -anrinophenoxy)phenyl] sulfone, 503 A,A -Bis(4-aminophenyl)-A, A -diphenyl-l,4-phenylenediamine, 468... 

Bis(4-aminophenylthio)benzophenone-3,3 -disulfonic acid, 496 Bis(3-aminopropyl)-l,l,3,3-tetramethyldisiloxane, 503... 

A similar method was used by Zhai [77] for the synthesis of BAPBDS and 4,4 -bis(4-aminophenylthio)benzophenone-3,3 -disulfonic acid (BAPTBPDS), as well as by Shobha et al. [78] for the synthesis of sulfonated bis(3-aminophenyl)phenyl phosphine oxide (SBAPPO). Because of the aromatic nucleophilic substitution reaction, this procedure leads to the incorporation of two ether bridges in the corresponding sulfonated diamines. This structure... 

Benzophenone (diphenyl ketone, 220) was first converted into the 3,3 -disulfonic acid 221 by heating the ketone with 15% oleum. Lapworth claimed that the substrate was scarcely affected by chlorosulfonic acid and the only product of the reaction was a small quantity of benzophenone-2,2 -disulfone. ... 

However, Cremlyn and co-workers,discovered that benzophenone 220, by heating with excess of the reagent (six equivalents) at 140 °C (3 hours), afforded a low yield (15%) of the 3,3 -disulfonyl chloride 222 and the 3,3 -disulfonic acid (221, 60%) (Equation 70). Later workers claimed that using a larger excess of chlorosulfonic acid (10 equivalents) at 150 °C resulted in an improved yield (50%) of the disulfonyl chloride 222 repetition of the experiment largely confirmed their results, but gave a slightly lower yield of the product (40%). ... 

CAS 76656-36-5 EINECS/ELINCS 278-520-4 Synonyms Benzenesulfonic acid, 3,3-carbonylbis (4-hydroxy-6-methoxy-, disodium salt 2,2-Dihydroxy-4,4-dimethoxy-5,5 -disulfobenzophe-none, disodium salt Disodium 3,3-carbonylbis (4-hydroxy-6-methoj benzenesulfonate) Disodium 2,2-dihydroxy-4,4-dimethoxy-benzophenone-5,5 -disulfonate Disodium 2,2-dihydroxy-4,4-dimethoxy-5,5 -disulfobenzophenone ClasaScadon Qrganic benzophenone deriv. 

Disodium dihydrogen (1-hydroxyethylidene) diphosphonate. See Disodium etidronate Disodium dihydrogen pyrophosphate. See Sodium acid pyrophosphate Disodium 5,5 -(2-(1,3-dihydro-3-oxo-2H-indazol-2-ylidene)-1,2-dihydro-3H-indol-3-one) disulfonate. See Cl 73015 Disodium 2,2 -dihydroxy-4,4 -dimethoxybenzophenone-5,5 -disulfonate Disodium 2,2 -dihydroxy-4,4 -dimethoxy-5,5 -disulfobenzophenone. See Benzophenone-9 Disodium dihydroxyethyl sulfosuccinyl undecylenate CAS 109840-16-6... 

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