Process for preparing imidazolidine-2,5-dione derivative

Details Process for preparing imidazolidine-2,5-dione derivative Process for preparing imidazolidine-2,5-dione derivative

1990-07-18

1992-09-29

Lee, Mary C.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D23530

Patent

active

051515245

ABSTRACT:
A process for preparing an imidazolidine-2,5-dione derivative of the formula ##STR1## includes reacting a phenyl isocyanate compound of the formula ##STR2## with methylhydantoin of the formula ##STR3## in the presence of a basic catalyst, wherein X is a halogen atom, lower alkyl, lower alkoxyl, lower haloalkyl, nitro cyano or alkoxycarbonyl, and n is an interger of 0 or 1 to 4. A second process for preparing an imidazolidine-2,5-dione derivative of formula IV includes reacting phosgene or trichloromethyl chloroformate with methylhydantoin of formula VI in the presence of a dehydrogen chloride agent, and further reacting the resulting product with an aniline derivative of formula VII ##STR4## in the presence of a dehydrogen chloride agent, wherein X is same as above.

REFERENCES:
patent: 4578107 (1986-03-01), Imai

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