| 摘要 |
Title compd. (I), useful for treatment of a disease of the respiratory organs, was prepd. by the reduction of cysteine in a alkali soln. of monochloroacetic acid. Thus, 50 ml aq. 30% NaOH soln. was added in a mixed soln. of 30 g cysteine, 60 g monochloroacetic acid and 200 ml H2O, and heated to 30≦̸C. 20 g Zn powder was added in the soln., and stirred at 25-30≦̸C for 100 min to give 33.5 g carbocysteine (m.p. 198-202≦̸C).
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