5136-34-5Relevant articles and documents
Reduction of 4,4′-dinitrostilbene-2,2′-disulfonic acid with hydrogen on raney nickel
Bazanova,Kholodkova,Gostikin
, p. 436 - 440 (2002)
Reduction of 4,4′-dinitrostilbene-2,2′-disulfonic acid with hydrogen in aqueous solution on Raney nickel yields a trisazo compound identical to Direct Yellow K dye.
Selective reduction of 4,4′-dinitrostilbene-2,2′-disulfonic acid catalyzed by supported nano-sized gold with sodium formate as hydrogen source
Peng, Wenchao,Zhang, Fengbao,Zhang, Guoliang,Liu, Bo,Fan, Xiaobin
, p. 568 - 572 (2011)
Gold nanoparticles supported on four different metal oxides were prepared and applied in the chemoselective reduction of 4,4′-dinitrostilbene-2, 2′-disulfonic acid (DNS). With sodium formate as hydrogen source, > 99% of the DNS was transformed into 4,4′-diaminostilbene-2,2′- disulfonic acid (DSD) without the reduction of olefinic group, which uncovers a clean synthetic approach for useful amino substituted stilbene sulfonic acids.
Method for producing 4,4'-diaminobibenzyl-2,2'-disulfonic acid
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Paragraph 0038-0041; 0044-0047; 0049; 0050; 0055; 0057; 0059, (2019/10/01)
The invention discloses a method for producing 4,4'-diaminobenzyl-2,2'-disulfonic acid, the method comprises the following steps: adding DNS, an iron-copper composite carrier catalyst and a solvent which is methanol or ethanol into an autoclave, and heati