Hydrochloric Acid → 2-(Phenethylhydrazono)-propionic acid

참여 물질

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반응 단계

To a solution of 5.7 g. 2,2-dichloropropionic acid and 2.8 g. potassium carbonate in 40 ml water is added a solution of 6.9 g. phenethylhydrazine hydrochloride and 5.6 g. potassium carbonate in 20 ml water. The mixture is heated with stirring to 90° C., a further solution of 5.6 g. potassium carbonate in 20 ml water is dropped in over 30 minutes and further stirred for 60 minutes at 90° C. Afterwards the still alkaline solution is cooled to ambient temperature, shaken out with ether and acidified with concentrated hydrochloric acid. 2-(phenethylhydrazono)-propionic acid crystallizes out and is recrystallized from toluene. The yield is 3.3 g. (40% of theory); m.p. 74°-76° C.

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