Process for the preparation of 1-carbamoyl-3-(3,5-...

Details Process for the preparation of 1-carbamoyl-3-(3,5-... Process for the preparation of 1-carbamoyl-3-(3,5-...

C - Chemistry, Metallurgy

07

D

260/315.05

C07D 233/80 (2006.01)

Patent

CA 1164466

ABSTRACT "PROCESS FOR THE PREPARATION OF 1-CARBAMOYL-3- (3,5-DICHLOROPHENYL)-HYDANTOINS AND AN INTERMEDIATE THEREFOR" Process for the manufacture of N-substituted 1-carbamoyl-3-(3,5-dichlorophenyl)-hydantoins of the formula: Image (I) in which R1 represents alkyl (C1-C4) or phenyl and R2 represents hydrogen or alkyl (C1-C4) which comprises a. reacting phosgene with 3-(3,5-dichlorophenyl)- hydantoin in an inert organic solvent medium, in the presence of an acid acceptor, to form 1-chlorocarbonyl- 3-(3,5-dichlorophenyl)-hydantoin, and b. reacting the chlorocarbonyl compound formed with an amine HNR1R2 in an inert organic solvent, in the presence of an acid acceptor to obtain the compounds of Formula I, which can be used as agricultural fungicides, with good yields.

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