Method for preparation of 2-imino 4-oxo-5-phenyloxazolidine

Details Method for preparation of 2-imino 4-oxo-5-phenyloxazolidine Method for preparation of 2-imino 4-oxo-5-phenyloxazolidine

1996-04-03

1998-01-13

Gerstl, Robert

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D26340

Patent

active

057081824

ABSTRACT:
A process for the preparation of 2-imino-4-oxo-5-phenyloxazolidine, which is used in medical applications under the name of pemolin, is described. The preparation proceeds by reacting at 10.degree. to 150.degree. C., optionally in the presence of a base catalyst, an aliphatic or an aromatic mandelic acid ester with an alkali or alkaline earth metal hydrogencyanamide, which can be prepared in situ; followed by treating the obtained reaction mixture or the metal salt isolated therefrom with a protonic acid, at temperatures from -30.degree. to 150.degree. C. until a pH value from 2 to 10 is reached.

REFERENCES:
patent: 2892753 (1959-06-01), Schmidt
patent: 3029189 (1962-04-01), Hardy
patent: 3321470 (1967-05-01), Howell

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