Ciba-Geigy Corporation

Novartis Corporation

Novartis Finance Corporation

Hans-Dieter Schneider

Werner Topfl

Willy Meyer

Dieter Durr

Albert Pfiffner

Jean-Marie Assercq

Werner Pfaff

Henry Szczepanski

William R Lutz

Alfred Seiler

There is described a process for the preparation of a compound of formula I ##STR1## in which process: a) a compound of formula II ##STR2## is reacted with an organolithium compound of formula III

Process for the preparation of o-chloromethyl-phenylglyoxylic acid

The present invention relates to the novel use of antidotes of formula I ##STR1## wherein R.sup.1 is C.sub.1 -C.sub.6 alkyl or C.sub.3 -C.sub.6 cycloalkyl, and each of R.sup.2 and R.sup.3, independently of the other, is hydrogen, C.sub.1 -C.sub.3 alkyl, trifluoromethyl or cyclopropyl, with the proviso that only one of the symbols R.sup.2 and R.sup.3 may be hydrogen, for protecting cultivated plants from the phytotoxic action of herbicides. The invention relates also to novel compounds and the preparation thereof and to novel intermediates and the preparation thereof. The invention further relates to herbicidal compositions that contain a combination of herbicide and antidote and to corresponding methods of controlling weeds. Finally, the invention relates also to the seeds of cultivated plants protected by the treatment with the antidote.

1,2,4-triazolo-[1,5a]pyrimidin-2-yl derivatives

O-substituted hydroxylamines of the formula I

Process for the preparation of O-substituted hydroxylamines

The present invention relates to the novel use of antidotes of formula I ##STR1## wherein R.sup.1 is C.sub.1 -C.sub.6 alkyl or C.sub.3 -C.sub.6 cycloalkyl, and each of R.sup.2 and R.sup.3, independently of the other, is hydrogen, C.sub.1 -C.sub.3 alkyl, trifluoromethyl or cyclopropyl, with the proviso that only one of the symbols R.sup.2 and R.sup.3 may be hydrogen, for protecting cultivated plants from the phytotoxic action of herbicides. The invention relates also to novel compounds and the preparation thereof and to novel intermediates and the preparation thereof. The invention further relates to herbicidal composition that contain a combination of herbicide and antidote and to corresponding method of controlling weeds. Finally, the invention relates also to the seeds of cultivated plants protected by the treatment with the antidote.

1,2,4-triazolo[1,5-A]pyridi

Imidazole derivatives of formula I ##STR1## and stereochemically isomeric forms thereof, and their salts, have useful herbicidal properties. The substituents R.sup.1, L and X have the meanings defined herein.

Herbicidally active 5,6-dihydrocyclopentathiophenyl-imidazole derivatives

Hydroxamic acid esters

Novel substituted N-sulfonyl-N'-pyrimidinylureas or N-sulfonyl-N'-triazinylureas of the formula I ##STR1## have good pre- and postemergence selective herbicidal and growth regulating properties. In this formula

Herbicidal sulfonylureas

Imidazole derivatives of formula I ##STR1## and the stereochemically isomeric forms thereof, and salts thereof, have useful herbicidal properties. The substituents R.sup.1, L and X have the meanings defined herein.

Imidazole derivatives

Novel substituted N-sulfonyl-N'-pyrimidinylureas or N-sulfonyl-N'-triazinylureas of the formula I ##STR1## have good pre- and postemergence selective herbicidal and growth regulating properties. In this formula E is nitrogen or --CH.dbd., the group ##STR2## is a phenyl, naphthyl, furyl, thiophenyl, pyrrole or pyridinyl radical which is substituted in accordance with the definitions of

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Weil am Rhein, Germany

Hans-Dieter Schneider