Abstract: The invention relates to a novel process for preparing substituted aryluracils by reacting aminoalkenoic esters with arylurethanes and then with sulfonamides, and additionally to novel 4-(alkoxycarbonylamino)-2,5-difluorobenzonitriles.

Abstract: The invention relates to novel thiophene derivatives of the formula (I) ##STR1## in which X represents halogen, alkyl, alkoxy, alkylthio, halogenoalkyl, halogenoalkoxy, nitro or cyano, or two substituents X, together with the carbon atoms to which they are attached, form a saturated or unsaturated, optionally substituted ring,n represents a number from 1 to 3, andZ represents one of the groups ##STR2## in which A, B, D, G, have the meaning given in the description, to processes for their preparation and to their use as pesticides and herbicides.

Abstract: The present invention relates to a novel process for preparing N-methyl-N'-nitroguanidine by reacting nitroguanidine with aqueous methylamine solution at 0.degree. to 40.degree. C.

Abstract: A new process for the preparation of a known 1,3-dimethyl-5-fluoro-pyrazole-4-carboxanilide of the formula ##STR1## in which Ar represents optionally substituted phenyl,which process comprisesa) reacting in a first stage, 1,3-dimethyl-5-chloro-pyrazole-4-carbonyl chloride with a fluoride, if appropriate in the presence of a diluent, andb) reacting in a second stage, the 1,3-dimethyl-5-fluoro-pyrazole-4-carbonyl fluoride obtained in this reaction with an aniline of the formulaH.sub.2 N--Arin whichAr has the abovementioned meaning,if appropriate in the presence of an acid acceptor and if appropriate in the presence of a diluent.1,3-Dimethyl-5-fluoro-pyrazole-4-carbonyl fluoride as a new compound.

Abstract: A new process for the preparation of a known 1,3-dimethyl-5-fluoro-pyrazole-4-carboxanilide of the formula ##STR1## in which Ar represents optionally substituted phenyl,which process comprisesa) reacting in a first stage, 1,3-dimethyl-5-chloro-pyrazole-4-carbonyl chloride with a fluoride, if appropriate in the presence of a diluent, andb) reacting in a second stage, the 1,3-dimethyl-5-fluoro-pyrazole-4-carbonyl fluoride obtained in this reaction with an aniline of the formulaH.sub.2 N--Arin whichAr has the abovementioned meaning,if appropriate in the presence of an acid acceptor and if appropriate in the presence of a diluent.1,3-Dimethyl-5-fluoro-pyrazole-4-carbonyl fluoride as a new compound.

Abstract: The invention relates to a novel process for the preparation of 1,2,4-triazine-3,5-diones by decarboxylation of corresponding 6-carboxy-1,2,4-triazine-3,5-diones, characterized in that it is carried out in aprotic organic solvents.

Abstract: A new process for the preparation of pyrazolines of formula ##STR1## is provided, in which R.sup.1 and R.sup.3 are identical or different and each represent optionally substituted aryl or optionally substituted and/or benzo-fused heterocyclyl with 5 or 6 ring members of which 1 to 4 are nitrogen atoms and the remainder are carbon atoms, andR.sup.2 represents hydrogen or alkyl, cycloalkyl or aryl, each of which is optionally substituted.In this, in a first reaction stage, ketones of formula (II) ##STR2## are reacted with bis-dialkylaminomethanes of formula (III)(R.sup.4).sub.2 N--CH.sub.2 --N(R.sup.4).sub.2 (III)in whichR.sup.4 represents alkyl,optionally in the presence of a diluent, at temperatures between 0.degree. C. and 100.degree. C. and the substituted dialkylaminoalkyl ketones of general formula (IV) ##STR3## formed in this way are optionally isolated and in a second process stage are reacted with hydrazine (hydrate), optionally in the presence of a diluent, at temperatures between 0.degree. C.

Abstract: A new process for the preparation of pyrazolines of formula ##STR1## In this, in a first reaction stage, ketones of formula (II) ##STR2## are reacted with bis-dialkylaminomethanes of formula (III)(R.sup.4).sub.2 N--CH.sub.2 --N(R.sup.4).sub.2 (III)in whichR.sup.4 represents alkyl,optionally in the presence of a diluent, at temperatures between 0.degree. C. and 100.degree. C. and the substituted dialkylaminoalkyl ketones of general formula (IV) ##STR3## formed in this way are optionally isolated and in a second process stage are reacted with hydrazine (hydrate).The compounds of formula (I) are known intermediates for the preparation of pyrazoline end products which have a powerful insecticidal action.

Abstract: A process for the preparation of 2,3-dichloro-5-acetylpyridine of the formula ##STR1## comprising decarboxylating a compound of the formula ##STR2## in which R.sup.1 stands for methyl or ethyl,in a mixture of water and a water miscible aprotic solvent.

Abstract: In the preparation of 2-chloro-5-methyl-pyridine of the formula ##STR1## by reacting 3-methyl-pyridine-1-oxide of the formula ##STR2## with a chlorinating agent, the improvement which comprises effecting the reaction in the presence of a chlorinating agent of the formula ##STR3## in which A represents oxygen or the grouping ##STR4## in which R.sup.2 and R.sup.3 individually represent alkyl, cycloalkyl or aryl or together represent alkanediyl or oxaalkanediyl andR.sup.1 represents hydrogen, chlorine, alkyl, cycloalkyl, aryl or the grouping ##STR5## in which R.sup.2 and R.sup.3 have the abovementioned meanings,and where, if R.sup.1 represents aryl, A must represent the grouping ##STR6## in the presence of a basic organic nitrogen compound and in the presence of a diluent at a temperature between about -20.degree. C. and +120.degree. C. The product is known to be useful in the systhesis of pharmaceuticals and insecticides.

Abstract: A new process has been found for the preparation of substituted 2-chloropyridine derivatives of the formula (I) ##STR1## wherein R.sup.1 to R.sup.4 have the meanings as defined in the description.The new process is characterized in that pyridine 1-oxides of the formula II ##STR2## are reacted with a chlorine-containing phosphoric acid derivative from the series of the chlorophosphoric esters and chlorophosphoramides in the presence of an inert organic solvent and in the presence of an acid acceptor at temperatures between -20.degree. C. and 200.degree. C., and the resulting product is separated further, if appropriate.Compound (I) is known as an intermediate product for medicaments (cf.DE-A 2,812,585) or for insecticidel nitromethylene derivatives (cf. EP-A 163,855).

Abstract: The novel process ##STR1## gives the end products, known as animal growth-promoters and coccidiostatics. Intermediates II are new.

Abstract: In the preparation of 2-chloro-5-methylpyridine of the formula ##STR1## by reacting 3-methylpyridine 1-oxide with phosphorus oxychloride, the improvement which comprises carrying out the reaction in the presence of a basic organic nitrogen compound and in the presence of a diluent at a temperature between about -50.degree. C. and +50.degree. C.

Abstract: The novel process ##STR1## gives the end products, known as animal growth-promoters and cooccidiostatics. Intermediates II are new.

Abstract: A process for the preparation of a 1-aryl-5-amino-pyrazole of the formula ##STR1## in which Ar is in each case optionally substituted phenyl or pyridyl, comprising reacting an arylhydrazine of the formulaAr--NH--NH.sub.2with acrylonitrile of the formulaCH.sub.2 .dbd.CH--CNin a first stage in the presence of a diluent at a temperature between about 20.degree. C. and 100.degree. C. to form the arylhydrazine derivative of the formulaAr--NH--NH--CH.sub.2 --CH.sub.2 --CN, andin a second stage contacting such derivative with an oxidizing agent in the presence of a base at a temperature between about 0.degree. C. and 60.degree. C., thereby to effect oxidation and cyclization. The products are known intermediates for herbicides and insecticides.

Abstract: 4-susbstituted 1-aryl-5-amino-pyrazoles of the formula ##STR1## in which R.sup.1 represents hydrogen or alkyl,R.sup.2 represents alkyl or halogenoalkyl, andAr represents in each case polysubstituted phenyl or polysubstituted pyridyl,some of which are known, are obtained when an arylhydrazine hydrohalide of the formulaAR--NH--NH.sub.2 x HHalin whichHal represents halogen, andAr has the abovementioned meaning,is reacted with an acrylonitrile derivative of the formula ##STR2## in which R.sup.1 and R.sup.2 have the abovementioned meaning, andR.sup.3 and R.sup.4, independently of one another, in each case represent alkyl or phenyl, orR.sup.3 and R.sup.4, together with the nitrogen atom to which they are bound, represent a saturated heterocyclic ring,at temperatures between 60.degree. C. and 90.degree. C.

Abstract: A process for the preparation of 5-chloromethylpyridines of the formula (I) ##STR1## in which R.sup.1 represents chlorine or nitro,R.sup.2 represents chlorine, andn represents the number 0 to 1, comprising chlorinating 5-methylpyridine of the formula (II) ##STR2## in which R.sup.1, R.sup.2 and n have the abovementioned meanings, at temperatures between 0.degree. C. and 100.degree. C., if appropriate in the presence of acid acceptors and if appropriate in the presence of inert diluents.

Abstract: There is disclosed an R enantiomer of phenoxypropionic acid compound of the formula ##STR1## in which X represents hydrogen or halogen, and R represents hydroxyl, alkoxy, halogen or the radical of the formula ##STR2## wherein R.sup.1 and R.sup.2 independently of one another represent hydrogen or methyl, n represents 0, 1 or 2 and Y represents trimethylsilyl, or optionally substituted azolyl bonded via nitrogen, or represents alkoxy, alkoxycarbonyl or the radical of the formula ##STR3## wherein Q represents oxygen, sulphur, SO or SO.sub.2 and R.sup.3 and R.sup.4 independently of one another represent hydrogen, halogen, alkyl having 1 to 4 carbon atoms, alkoxy having 1 to 4 carbon atoms, alkylthio having 1 to 4 carbon atoms, nitro, cyano or alkoxycarbonyl having 1 to 4 carbon atoms in the alkoxy group; compositions containing herbicidally effective amounts of such R enantiomers and the use of such R enantiomers as herbicides.

Abstract: Novel lactic acid silyl esters of the formula ##STR1## in which R represents alkyl or aryl, are obtained by a new process which comprises reacting a lactic acid of the formula ##STR2## with a chloromethylsilane of the formula ##STR3## in which R has the meaning indicated above, in the presence of a tertiary amine and, if appropriate, in the presence of an additional diluent, at temperatures between 50.degree. and 120.degree. C.