N-heteroaryl-N'-(pyrid-2-ylsulfonyl)ureas, processes for their p

Details N-heteroaryl-N'-(pyrid-2-ylsulfonyl)ureas, processes for their p N-heteroaryl-N'-(pyrid-2-ylsulfonyl)ureas, processes for their p

1996-03-22

1998-02-03

Dentz, Bernard

Plant protecting and regulating compositions

Plant growth regulating compositions

Organic active compound containing

504213, 504215, 504216, 544212, 544298, 544320, 544331, 5462724, 546293, C07D52100, A01N 4736

Patent

active

057144362

DESCRIPTION:

BRIEF SUMMARY
This application is a 35 U.S.C. 371 National Stage filing of PCT EP/94/02628 published as WO95/06049 on Mar. 2, 1995.
The invention relates to the technical field of herbicides and plant growth regulators, in particular of herbicides for the selective control of broad-leaved weeds and grass weeds in crops of useful plants.
It has been disclosed that some 2-pyridylsulfonyl ureas have herbicidal and plant growth-regulating properties; cf. EP-A-13 480, EP-A-272 855, EP-A-84224, U.S. Pat. No. 4,421,550, EP-A-103543 (U.S. Pat. No. 4,579,583) U.S. Pat. No. 4,487,626, EP-A-125864, WO 88/04297 and WO 91/10660 (ZA 91/0173).
Further 2-pyridylsulfonyl ureas which have specific radicals in the 3-position of the pyridyl radical and which are suitable as herbicides and plant growth regulators have now been found.
The present invention relates to compounds of the formula (I) or to salts thereof, ##STR2## in which R.sup.1 is H, (C.sub.1 -C.sub.6)alkyl which is unsubstituted or substituted by one or more radicals selected from the group consisting of halogen, nitro, (C.sub.1 -C.sub.4)alkoxy, (C.sub.3 -C.sub.6)cycloalkyl, cyano, aryl and substituted aryl, (C.sub.3 -C.sub.6)cycloalkyl which is unsubstituted or substituted by one or more radicals selected from the group consisting of halogen, (C.sub.1 -C.sub.4)alkyl and (C.sub.1 -C.sub.4)alkoxy, or (C.sub.2 -C.sub.6)alkenyl or (C.sub.2 -C.sub.6)alkynyl, each of the two last-mentioned radicals being unsubstituted or substituted by one or more radicals selected from the group consisting of halogen, (C.sub.1 -C.sub.4)alkoxy and (C.sub.3 -C.sub.6)cycloalkyl, or is aryl, substituted aryl, or an acyl radical of the formula -C.sub.6)alkynyl, each of the three last-mentioned radicals being unsubstituted or substituted by one or more radicals selected from the group consisting of halogen, (C.sub.1 -C.sub.4)alkoxy, (C.sub.1 -C.sub.4)alkylthio, (C.sub.1 -C.sub.4)alkylsulfinyl, (C.sub.1 -C.sub.4)alkylsulfonyl, nitro, cyano, thiocyanato, aryl, and substituted aryl, or is (C.sub.1 -C.sub.4)alkoxy, (C.sub.2 -C.sub.4)alkenyloxy, (C.sub.2 -C.sub.4)alkynyloxy or (C.sub.1 -C.sub.4)alkylthio, each of the last-mentioned four radicals being unsubstituted or substituted by one or more radicals selected from the group consisting of halogen, (C.sub.1 -C.sub.4)alkoxy, (C.sub.1 -C.sub.4)alkylthio, aryl and substituted aryl, or is (C.sub.3 -C.sub.6)cycloalkyl or (C.sub.3 -C.sub.6)cycloalkoxy, each of the last-mentioned two radicals being unsubstituted or substituted by one or more radicals selected from the group consisting of (C.sub.1 -C.sub.4)alkyl, (C.sub.1 -C.sub.4)alkoxy, (C.sub.1 -C.sub.4)alkylthio, (C.sub.1 -C.sub.4)haloalkyl, and halogen, or is a radical of the formula NR.sup.a R.sup.b, by one or more radicals selected from the group consisting of halogen, nitro, (C.sub.1 -C.sub.4)alkoxy, (C.sub.3 -C.sub.6)cycloalkyl, aryl and substituted aryl, or (C.sub.3 -C.sub.6)cycloalkyl which is unsubstituted or substituted by one or more radicals selected from the group consisting of halogen, (C.sub.1 -C.sub.4)alkyl, (C.sub.1 -C.sub.4)alkoxy, (C.sub.1 -C.sub.4)haloalkyl, aryl and substituted aryl, or (C.sub.2 -C.sub.6)alkenyl or (C.sub.2 -C.sub.6)alkynyl, each of the last-mentioned two radicals being unsubstituted or substituted by one or more radicals selected from the group consisting of (C.sub.1 -C.sub.4)alkoxy, (C.sub.1 -C.sub.4)haloalkyl, (C.sub.3 -C.sub.6)cycloalkyl and halogen, or aryl, substituted aryl or a radical of the formula R'R"R'"Si, in which R', R" and R'" independently of one another are (C.sub.1 -C.sub.4)alkyl, or an acyl radical of the formula -C.sub.6)alkynyl, each of the three last-mentioned radicals being unsubstituted or substituted by one or more radicals selected from the group consisting of halogen, (C.sub.1 -C.sub.4)alkoxy, (C.sub.1 -C.sub.4)alkylthio, (C.sub.1 -C.sub.4)alkylsulfinyl, (C.sub.1 -C.sub.4)alkylsulfonyl, nitro, cyano, thiocyanato, aryl, and substituted aryl, or is (C.sub.1 -C.sub.4)alkoxy, (C.sub.2 -C.sub.4)alkenyloxy or (C.sub.2 -C.sub.4)alkynyloxy, each of the las

REFERENCES:
patent: 4421550 (1983-12-01), Selby et al.
patent: 4487626 (1984-12-01), Zimmerman
patent: 4579583 (1989-02-01), Fory et al.
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patent: 5221315 (1993-06-01), Fory et al.
patent: 5529976 (1996-06-01), Kehne et al.

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