Benzensulfonamide derivatives

Details Benzensulfonamide derivatives Benzensulfonamide derivatives

A - Human Necessities

01

N

71/9, 71/10.3, 2

A01N 41/06 (2006.01)

Patent

CA 1092153

Abstract of the Disclosure A compound of the general formula Image wherein RO represents an alkyl group optionally having a substituent selected from the class consisting of a cyano group, lower alkoxy groups and di-(lower alkyl)amino groups, a lower alkenyl group, or a lower alkynyl group; R1, R2 and R3, independently from each other, represent a hydrogen atom, a halogen atom, a lower alkyl group, or a lower alkoxy group; R4, R5, R6, R7 and R8, independently from each other, represent a hydrogen atom, a halogen atom, a lower alkyl group, or a lower alkoxy group; Y represents a group of the formula Image or a group of the formula Image in which one of R9 and R10 is a lower alkyl group and the other is a hydrogen atom or a lower alkyl group; with the proviso that when Y is the group Image and RO represents an unsub- stituted alkyl group, R4, R5, R6, R7 and R8 do not represent hydrogen atoms at the same time. The compounds of formula (I) are produced by the reaction of the corresponding benzenesulfonamide derivatives with the corresponding benzyl or benzoyl halides; the reaction of the corresponding benzenesulfonyl halidos with the corrosponding benzylamines or benzoyl amides; or by the alkylation, alkenylation or alkynylation of the corrosponding compounds of formula(I) in which RO is hydrogen. The compounds of formula (I) have superior selective herbicidal effects, and are useful as active ingredients of herbicides, especially those for application of aquatic rice paddies.

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