摘要:
The invention relates to a process for preparing a compound of formula (I), in which X is CH or N, Y is NO2 or CN, Z is CHR3, O, NR3 or S, R1 and R2 are either each, independently of the other, hydrogen or unsubstituted or R4-substituted alkyl or together a two- or three-membered alkylene bridge or a two- or three-membered alkylene bridge in which one member is replaced by a hetero member selected from the group, consisting of NR5, O and S, R3 is H or unsubstituted or R4-substituted alkyl, R4 is an unsubstituted or substituted aryl or heteroaryl group, and R5 is H or alkyl, which comprises a) reacting a compound of formula (II) with a chlorinating agent or b1) initially reacting a compound of formula (IV) with a compound of formula (V) and b2) further reacting the compound of formula (II) obtainable thereby, with or without intermediate isolation, with a chlorinating agent, to intermediates used in this process, to the use of these intermediates and to a process for the preparation of these intermediates.
摘要:
A process for the preparation of an aqueous medium of nicotinaldehyde by the catalytic reduction of 3-cyanopyridine under hydrogen in the presence of Raney-nickel.
摘要:
A process for the preparation of 6-alkyl-4-(pyridin-3-yl-methyleneamino)-4,5-dihydro-1,2,4-triazin-3(2H)-one by the reaction of 4-amino-6-alkyl-3-oxo-2,3,4,5-tetrahydro-1,2,4-triazine with 3-cyanopyridine wherein the reaction is carried out under catalytic hydrogenation conditions in the presence of a Raney-nickel catalyst in an aqueous alcoholic medium, at a temperature between 0.degree. and 70.degree. C., at a pH of between 2 and 7, and in the presence of and a C.sub.1 -C.sub.6 -carboxylic acid or a C.sub.1 -C.sub.6 -carboxylic acid alkali metal salt or both, whereby the hydrogen pressure is between 0.1 and 10 bar.
摘要:
A 2-(2-halogenoethylthio)-phenylsulfonamide of the formula I ##STR1## in which Z.sub.1 and Z.sub.2 independently of one another are hydrogen, fluorine or chlorine, is prepared by a process wherein:a) a 2-halogenophenylsulfonamide of the formula II ##STR2## in which X is fluorine, chlorine or bromine, is converted, in the presence of a base, together with a mercaptan of the formula IIIR-SH (III) in which R is C.sub.1 -C.sub.6 alkyl or C.sub.1 -C.sub.6 alkyl substituted by phenyl, into a 2-sulfenylphenylsulfonamide,b) this compound is oxidized to give the 2-sulfinylphenylsulfonamide,c) the resulting 2-sulfinylphenylsulfonamide is converted, in the presence of an acid, into the disulfide of the formula VI ##STR3## d) the disulfide of the formula VI is reduced to the 2-mercaptophenylsulfonamide,e) this compound is then converted, by means of a trialkylamine of the formula X(R.sub.1).sub.3 N (X) in which R.sub.1 is C.sub.1 -C.sub.4 alkyl, into the 2-mercaptophenylsulfonamide trialkylamine salt, andf) this compound is then reacted with a halogenofluoroethane of the formula IXY-CH.sub.2 CFZ.sub.1 Z.sub.2 (IX) in which Y is chlorine or bromine and Z.sub.1 and Z.sub.2 independently of one another are hydrogen, fluorine or chlorine.
摘要:
1,5-substituted imidazole derivatives of formula I ##STR1## the stereochemically isomeric forms thereof, and the salts thereof, have useful herbicidal properties. The substituents R.sup.1, R.sup.2, R.sup.3, R.sup.4, X.sup.1, X.sup.2, X.sup.3, A, L and m have the meanings defined herein.
摘要:
N,N'-dicyanocyclopropanecarbamidines useful as triazine intermediates, of the formula II ##STR1## in which M is hydrogen or an equivalent of an alkali or earthalkali ion and processes for their production.
摘要:
Novel thiazolylalkyl and thienylalkyl esters of .alpha.-imidazolinone-nicotinic and .alpha.-imidazolinonebenzoic acids of formula I below have good selective herbicidal properties pre- and postemergence and also influence or inhibit plant growth.The Novel esters have the formula I ##STR1## wherein A is a stright chain or branched C.sub.1 -C.sub.6 alkylene bridge,Q and Q.sub.1 are each independently of the other nitrogen or the methine group,R.sub.1 and R.sub.2 are each independently of the other hydrogen or C.sub.1 -C.sub.4 alkyl, andX and Y are each independently of the other hydrogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.3 -C.sub.4 alkenyl, C.sub.1 -C.sub.4 haloalkyl or halogen, or together they are the butadiene radical. ,
摘要:
2-Amino-4-cyclopropyl-1,3,5-triazines and processes for their production are disclosed. The 2-amino-4-cyclopropyl-1,3,5-triazines are intermediate in the production of herbicidally active N-(cyclopropyltriazinyl)-N'-arylsulfonyl ureas and correspond to the formula ##STR1## wherein R.sub.1 is hydrogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy, and R.sub.2 is C.sub.1 -C.sub.3 -alkyl, C.sub.1 -C.sub.3 -haloalkyl or C.sub.2 -C.sub.6 -alkoxyalkyl.
摘要:
Compounds of the formula ##STR1## wherein Z is phenyl optionally mono- or di-substituted by halogen, nitro, cyano, trifluoromethyl, C.sub.1 -C.sub.4 alkoxy or C.sub.1 -C.sub.4 alkyl; naphthyl; or furyl;R is cyano, C.sub.1 -C.sub.4 alkoxy, di(C.sub.1 -C.sub.6 -alkyl)-amino, halogen or C.sub.1 -C.sub.4 alkyl;n is 0, 1 or 2;Y is oxygen or sulfur;Q is straight-chain or branched-chain C.sub.2 -C.sub.6 -alkylene;each of R.sub.1 and R.sub.2 is C.sub.1 -C.sub.6 alkyl, C.sub.3 -C.sub.6 -alkenyl, C.sub.3 -C.sub.6 -alkynyl or C.sub.3 -C.sub.8 -cycloalkyl; orR.sub.1 and R.sub.2 together with the nitrogen atom to which they are attached form a C.sub.5 or C.sub.6 heterocyclic group with a maximum of two hetero atoms, which group is optionally substituted by C.sub.1 -C.sub.3 alkyl are useful selective herbicides for post-emergence application in crops of cereals, rice and maize.
摘要:
N-(Cyclopropyl-triazinyl- and -pyrimidinyl)-N'-arylsulfonyl ureas of the formula ##STR1## wherein Ar is a phenyl group ##STR2## or a naphthyl group ##STR3## and Q is a group X-A or R.sub.3,A is a C.sub.3 -C.sub.6 -alkynyl group, a C.sub.1 -C.sub.6 -alkyl group which is unsubstituted or substituted by 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, C.sub.1 -C.sub.4 -haloalkoxy, C.sub.1 -C.sub.4 -haloalkylthio, C.sub.1 -C.sub.4 -haloalkylsulfinyl or C.sub.1 -C.sub.4 -haloalkylsulfonyl, or a C.sub.2 -C.sub.6 -alkenyl group which is unsubstituted or substituted by the groups given in the foregoing for C.sub.1 -C.sub.6 -alkyl, or A is a phenyl or benzyl group,E is the methine group or nitrogen,X is oxygen, sulfur, or a sulfinyl or sulfonyl bridge,Z is oxygen or sulfur,R.sub.1 is hydrogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy,R.sub.2 is halogen, C.sub.1 -C.sub.3 -alkyl, C.sub.1 -C.sub.3 -haloalkyl, C.sub.1 -C.sub.3 -alkoxy, C.sub.1 -C.sub.3 -haloalkoxy, amino, C.sub.1 -C.sub.3 -alkylamino, di-(C.sub.1 -C.sub.3 -alkyl)amino, C.sub.3 -C.sub.6 -cycloalkyl or C.sub.2 -C.sub.6 -alkoxyalkyl,R.sub.3 is hydrogen, halogen, C.sub.1 -C.sub.5 -alkyl, C.sub.2 -C.sub.5 -alkenyl, C.sub.1 -C.sub.4 -haloalkyl, or a group --X-R.sub.6, --COZR.sub.11, --NO.sub.2 or --CO-NR.sub.8 R.sub.9, --CN, --COR.sub.10, --NR.sub.1 R.sub.7 or --NR.sub.1 -COR.sub.12,R.sub.4 is hydrogen, 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, C.sub.1 -C.sub.4 -haloalkoxy, halogen, or alkoxyalkyl having at most 4 carbon atoms,R.sub.5 is the same as R.sub.3 but independent thereof,R.sub.6 and R.sub.7 are each C.sub.1 -C.sub.5 -alkyl, C.sub.2 -C.sub.5 -alkenyl or C.sub.2 -C.sub.6 -alkynyl,R.sub.8 and R.sub.9 independently of one another are each hydrogen, C.sub.1 -C.sub.5 -alkyl, C.sub.2 -C.sub.5 -alkenyl or C.sub.2 -C.sub.6 -alkynyl,R.sub.10 is hydrogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.3 -haloalkyl,R.sub.11 is hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.3 -haloalkyl, C.sub.3 -C.sub.5 -alkenyl, C.sub.3 -C.sub.5 -alkynyl, phenyl or benzyl, andR.sub.12 is the same as R.sub.1 but independent thereof, and the salts of these compounds with amines, alkali metal bases or alkaline-earth metal bases or with quaternary ammonium bases, have good pre- and post-emergence-selective herbicidal and plant-growth-regulating properties.