反应详情

105 parts of 2-[2,4-dinitrophenylsulfonyl]ethanol are slowly introduced, at from 0 to 5° C., into 380 parts of sulfuric acid monohydrate and stirring is carried out for 14 hours at that temperature. The brown solution obtained is then slowly discharged onto a mixture of ice and 20% sodium chloride solution, whereupon a yellowish suspension is formed. The precipitate is filtered off and washed first with 1000 parts of cold 20% sodium chloride solution and then with 200 parts of ice-water. After drying, 2-[2,4-dinitrophenylsulfonyl]ethyl hydrogen sulfate is obtained in a very good yield and very good purity.

1. customThe brown solution obtained
2. customis formed
3. filtrationThe precipitate is filtered off
4. washwashed first with 1000 parts of cold 20% sodium chloride solution
5. customAfter drying