Реакция #56445

Уравнение реакции

p-chlorobenzylmercaptoacetohydroxamic acid

hydrogen peroxide

→

α-(p-Chlorobenzylsulphinyl)-acetohydroxamic acid

Выход 85.0%

Растворители

acetic acid

acetic acid

Условия реакции

Обработка

1. 1
   workup.ADDITIONare added
2. 2
   Другоеis 20° C. at the start
3. 3
   Другоеsolution of the precipitate formed
4. 4
   ТемператураThe mixture is cooled
5. 5
   Фильтрацияthe p-chlorobenzylsulphinyl-acetohydroxamic acid is filtered off
6. 6
   ДругоеThis acid is recrystallised from acetic acid
7. 7
   Фильтрацияfiltered off
8. 8
   Промывкаthe precipitate is washed with water and with ethanol
9. 9
   Другоеdried
10. 10
    Другое31.9 g of CRL 40,411 are collected

Методика

31.7 g (0.091 mol) of p-chlorobenzylmercaptoacetohydroxamic acid are mixed with 100 ml of anhydrous acetic acid and 9.1 ml of hydrogen peroxide of 110 volumes strength are added. The temperature, which is 20° C. at the start, rises and solution of the precipitate formed is also observed. The temperature is maintained at 50° C. and after several minutes it is found that the sulphinyl derivative sets solid. 50 ml of acetic acid are now added and the temperature is kept at 50° C. for 1 hour whilst stirring vigorously. The mixture is cooled and the p-chlorobenzylsulphinyl-acetohydroxamic acid is filtered off. This acid is recrystallised from acetic acid and filtered off, the precipitate is washed with water and with ethanol, and dried, and 31.9 g of CRL 40,411 are collected. Yield 85%; instantaneous melting point 210° C. (with decomposition).

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