摘要:
A process for preparing 3-isopropyl-1H-2,1,3-benzothiadiazin-4 (3H)-one 2,2-dioxide (I) or a salt of I which comprises reacting anthranilic isopropylamide II simultaneously with sulfur trioxide or chlorosulfonic acid in the presence of an organic base or with adducts of sulfur trioxide and organic bases and phosphorus oxychloride at from 50° C. to the reflux temperature, followed, if appropriate, by conversion into its salts, is described.
摘要:
The present invention relates to a process for the preparation of optically active 2--halopropionic acids, in which the corresponding optically active alkyl 2--halopropionates are caused to react with a carboxylic acid at elevated temperature in a transacylation reaction with the formation of the optically active 2--halopropionic acid and the alkyl carboxylate, and the optically active 2--halopropionic acid obtained is separated from the reaction mixture. The optically active products produced are important intermediates for the preparation of plant protectants and pharmaceuticals.
摘要:
A process for preparing salts of 3-isopropyl-2,1,3-benzothia-diazin-4-one 2,2-dioxide of the general formula I ##STR1## (R.sup.1 -R.sup.4 =H, lower alkyl, lower hydroxyalkyl) by reacting bentazone (IIa) with an amine IIIa in an organic solvent, by reacting bentazone (IIa) with an amine IIIa or an ammonium salt IIIb in a virtually water-immiscible organic solvent and taking up the salt I in water or by reacting bentazone (IIa) with an ammonium salt IIIb or bentazone-sodium (IIb) with an ammonium salt IIIc, in each case in water.
摘要:
Novel dichloroacetamides of the formula (I) ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, m, n, p and q have the meanings given in the description.The compounds are antagonists which increase the toleration, by crops, of herbicidal acetanilides. Herbicides containing the dichloroacetamides of the formula I in combination with acetanilides may be used for controlling undesired plant growth in Indian corn and cereals.
摘要:
1-Polyfluoroalkoxyphenyl-4-substituted-5-halopyridazones-6 in which the 4-substituent is amino, monoalkylamino, dialkylamino (1 to 3 carbon atoms per alkyl) or lower alkoxy, chloroacetamido, CH.sub.3 COOCH.sub.2 --CO--NH-- or trimethylenimino and herbicidal uses thereof to control growth of unwanted plants among crop plants, especially cotton.
摘要:
3-Isopropyl-2,1,3-benzothiadiazin-4-one-2,2-dioxide (bentazone) is isolated from waste water, originating from its preparation and working up, by treating the waste water with an acid to bring the pH initially to 7.5-9.5, adding 0.2-0.5% by volume, based on the waste water, of a 40-60 percent strength by weight aqueous bentazone salt solution and heating the mixture for 15-30 minutes at 75.degree.-110.degree. C. The solution thus treated is then cooled and brought to pH 1-3 with a mineral acid, whereupon the bentazone precipitates in a form which can be filtered off.
摘要:
Herbicidal agents containing ethyl-N-ethyl-N-bicyclo-[2.2.1]-hept-2-yl-thiolcarbamate of the formula ##STR1## as herbicidal active ingredient and at least one haloacylamide of the formula ##STR2## where R denotes linear or branched haloalkyl of a maximum of 3 carbon atoms, and R.sup.1 and R.sup.2 are identical or different and each denotes linear or branched alkyl of a maximum of 6 carbon atoms which is unsubstituted or substituted by alkoxy of a maximum of 4 carbon atoms or by cyano, R.sup.1 and R.sup.2 further denote cycloalkyl of 3 to 6 carbon atoms, or linear or branched alkenyl or alkynyl of a maximum of 4 carbon atoms, or R.sup.1 and R.sup.2, together with the nitrogen atom whose substituents they are, form a 4- to 9-membered, saturated monocyclic or bicyclic ring which is unsubstituted or mono- or polysubstituted by linear or branched alkyl of a maximum of 4 carbon atoms, or a tetrahydro-1,3-oxazine ring of the formula ##STR3## where R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 are identical or different and each denotes hydrogen or linear or branched alkyl of a maximum of 3 carbon atoms, R.sup.8 denotes hydrogen or linear or branched alkyl of a maximum of 8 carbon atoms, R.sup.9 denotes hydrogen, linear or branched alkyl of a maximum of 8 carbon atoms, alkoxyalkyl of a maximum of 6 carbon atoms or dialkoxyalkyl of a maximum of 8 carbon atoms, or R.sup.8 and R.sup.9 may together form a methylene chain of 4 or 5 carbon atoms, as antagonistic agent.The weight ratio of ethyl-N-ethyl-N-bicyclo-[2.2.1]-hept-2-yl-thiolcarbamate to antagonistic agent is, whether applied together or separately, from 1:1 to 1:0.01.
摘要:
New and valuable carbothiolates of azetidines having a good herbicidal action, herbicides containing these compounds, and a process for controlling the growth of unwanted plants with these compounds.
摘要:
Novel dichloroacetamides of the formula (I) ##STR1## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, m, n, p and q have the meanings given in the description.The compounds are antagonists which increase the toleration, by crops, of herbicidal acetanilides. Herbicides containing the dichloroacetamides of the formula I in combination with acetanilides may be used for controlling undesired plant growth in Indian corn and cereals.
摘要:
Substituted pyridazone derivatives having a good herbicidal action, herbicides containing these compounds as active ingredients, and a process for controlling the growth of unwanted plants with these compounds.