1-(3-substituted benzyl)-3-halogeno-4-(1-halogeno-alkyl)-2-pyrro

Details 1-(3-substituted benzyl)-3-halogeno-4-(1-halogeno-alkyl)-2-pyrro 1-(3-substituted benzyl)-3-halogeno-4-(1-halogeno-alkyl)-2-pyrro

1990-06-06

1992-05-19

Springer, David B.

Chemistry: fertilizers

Processes and products

Forms or conditioning

548543, 548550, 548551, C07D20738, A01N 4336

Patent

active

051144662

ABSTRACT:
1-(3-Substituted benzyl)-3-halogeno-4-(1-halogenoalkyl)-2-pyrrolidinones of the general formula (I): ##STR1## where X represents a hydrogen atom or halogen atom, Y and Z each represents a chlorine atom or bromine atom, and R represents an alkyl group with 2 to 4 carbon atoms, are herbicides useful in rice paddy fields to control weeds therein, especially Echinochloa crusgalli and can be produced subjecting the corresponding 3-dihalogeno compounds to dehalogenation to remove one of the halogen atoms or by cyclizing a 2,2-dihalogenoacetamide derivative represented by the general formula (II) under the presence of an appropriate catalyst; ##STR2## in which X, Y, Z and R respectively have the same meanings as described above.

REFERENCES:
patent: 4110105 (1978-08-01), Teach
patent: 4210589 (1980-07-01), Teach
patent: 4645843 (1987-02-01), Broadhurst et al.

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