13287-76-8Relevant articles and documents
DYE AND DYEING METHOD
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Paragraph 0018-0019, (2019/11/16)
A dyeing method is provided, which includes dyeing a dye to a fiber by a supercritical fluid, wherein the dye has a chemical structure of:R 1 is C1-6alkyl group, R 2 is C1-6alkyl group, each of R 3 is independently of H or C1-6alkyl group, and R 4 is a single bond or C1-6alkylene group. When R 4 is single bond, R 5 is. When R 4 is C1-6alkylene group, R 5 is H, Br, Cl, or. Each of R 6 is independently of H, Cl, Br, OCH3, or C1-6alkyl group.
Method for preparing p-aminophenyl-beta-hydroxyethyl sulfone sulfate
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Paragraph 0009; 0010; 0011, (2018/04/03)
The invention discloses a method for preparing p-aminophenyl-beta-hydroxyethyl sulfone sulfate. The method comprises the following steps: with p-nitrochlorobenzene and mercaptoethanol as basic raw materials, adding into an N,N-dimethylformamide solvent, sufficiently dissolving and uniformly mixing to obtain p-nitrophenyl-beta-hydroxyethyl sulfide, then adding hydrogen peroxide, separating out an oxidization crystallization material, adding solvent water and a palladium-carbon catalyst into the oxidization crystallization material, reacting, filtering to obtain a hydrogenated product and the solvent water, adding the hydrogenated product into an ice-water mixture, diluting, adding pure sulfuric acid, stirring, heating to 150 DEG C, and performing an esterification reaction for 2-3h under avacuum condition to obtain the p-aminophenyl-beta-hydroxyethyl sulfone sulfate after the reaction. The product prepared by the method provided by the invention is high in purity and yield, the raw material consumption is low, the raw material utilization rate is increased, few byproducts are produced and are easy to separate, produced wastewater is easy to treat, and the environmental protection investment is low.
Ascorbic Acid Promoted Metal-Free Synthesis of Aryl Sulfides with Anilines Nitrosated in Situ by tert -Butyl Nitrite
Bu, Mei-Jie,Lu, Guo-Ping,Cai, Chun
supporting information, p. 1841 - 1846 (2015/08/06)
A mild, metal-free synthesis of aryl sulfides has been disclosed. Aryl diazonium ion was generated by the in situ nitrosation of aniline, and it was reduced by ascorbic acid (vitamin C) to form aryl radical, which underwent a thiolation with disulfide to yield aryl sulfide. The reaction proceeded smoothly without heating or irradiation. This strategy was also expanded to the synthesis of aryl selenides.