103-76-4, N-(2-Hydroxyethyl)piperazine is a piperazines compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated
131.5 g of N-hydroxyethylpiperazine (purity 99%, about 1 mol)And 30% (mass concentration) aqueous sodium vinyl sulfonate solution (containing 1.05 mol of sodium vinyl sulfonate)Was added to a 1000 mL four-necked flask equipped with a reflux tube,The addition reaction is carried out with sufficient stirring;The reaction was carried out at 60 C for 1.0 hour,And then gradually heated to boiling reflux (about 100 ~ 120 , depending on the composition of the reaction and change)And continue to react for 2.0 hours;then,Cooled to give a reaction mother liquorcontaining 4-hydroxyethylpiperazineethanesulfonate.By high performance liquid chromatography,The yield of sodium 4-hydroxyethylpiperazineethanesulfonate was calculated to be 95.2%.A reaction mother liquor containing 0.5 mol HEPES-Na at a mass concentration of 40 wt% was placed in a 500 mL beaker,Under stirring,At room temperature,27.3 g of oxalic acid (99 wt%) was added slowly,Then stir,And acidified at 20 C for 1 hour.Into the low temperature thermostat,Cooling to 10 ,Cooling crystallization for 0.5 hours,The precipitated sodium oxalate was removed by filtration.The filtrate was placed in a beaker,Constantly stirring,1.0 g of Ba (OH) 2 was slowly added,Reaction for 1 hour,Remove the sulfate.Adding 5 g of activated carbon decolorization and filtering by filtration to obtain the filtrate,By rotary evaporation to anhydrous,To obtain a solid primary purified product.The solids were washed three times with 500 ml of ethanol,And then vacuum drying,Get high purity HEPES.
103-76-4, As the paragraph descriping shows that 103-76-4 is playing an increasingly important role.
Reference：
Patent; Shandong University of Technology; Cui Hongyou; Wang Jiangang; Zhu Liwei; Liu Ransheng; Yang Yong; Wang Yang; (8 pag.)CN104803949; (2017); B;,
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