- Triazolecarboxamide herbicides
-
Compounds of the formula: STR1 wherein X is O or S; R and R1 are substituted or unsubstituted alkyl, alkenyl, alkynyl or cycloalkyl or R and R1 may be joined to form a heterocyclic ring; R2 is substituted or unsubstituted cycloalkyl; and n is 0, 1 or 2 are disclosed as well as their postemergence and preemergence selective herbicide use against both monocot and dicot weeds in crops such as sugarbeets, cotton, soybeans and rice.
- -
-
-
- 5,6-Dihydro-1,2,4,6-thiatriazin-5-one-1,1-dioxides
-
5,6-Dihydro-1,2,4,6-thiatriazin-5-one-1,1-dioxides of the formula STR1 where R1 is hydrogen, a metal atom or an unsubstituted or substituted ammonium radical, R2 is a saturated or unsaturated straight-chain aliphatic radical of up to 10 carbon atoms, a cycloaliphatic radical or 3 to 7 carbon atoms, a branched saturated or unsaturated aliphatic radical of 3 to 10 carbon atoms, a halogen-, alkoxy- or alkylmercapto-substituted aliphatic radical of 2 to 10 carbon atoms tetrahydrofuryl substituted methyl, a cycloalkoxy-substituted aliphatic radical of 4 to 10 carbon atoms, unsubstituted or halogen-substituted benzyl or phenyl, halophenyl, or alkylphenyl of a total of up to 10 carbon atoms, R3 is hydrogen, a straight-chain aliphatic radical of up to 10 carbon atoms, a cycloaliphatic radical of 3 to 7 carbon atoms, a branched aliphatic radical of 3 to 10 carbon atoms, haloalkyl, or alkoxyalkyl of 2 to 10 carbon atoms and X is oxygen and may also be sulfur if R2 is unsubstituted or halogen-substituted benzyl, processes for their preparation, and herbicides containing the above compounds.
- -
-
-
- Cinetique de la Dechloration du Barbane en Milieu Alcalin
-
4-Chloro-2-butynyl N-(3-chlorophenyl) carbamate (Barban) is an herbicide whose alkaline hydrolysis leads to the release of the chlorine atom of the ester group.The dechlorination kinetics were investigated in alkaline media at 25 deg C and followed spectrophotometrically or colorimetrically.The rate law of this reaction is complex and shows that the substrate as well as its anion are the reactive species.The pKa value determined spectrophotometrically was 13.50.
- Bergon, M.,Bonafos, M.,Calmon, J. P.
-
p. 1237 - 1240
(2007/10/02)
-
- Process for manufacturing 4-chloro-2-butynyl m-chlorocarbanilate
-
In the process for manufacturing 4-chloro-2-butynyl m-chlorocarbanilate (the herbicide barban) from the corresponding 4-hydroxy-2-butynyl m-chlorocarbanilate it has been discovered that yields and product quality are improved by employing dimethylformamide as reaction promoter in combination with thionyl chloride or phosgene as chlorinating agent.
- -
-
-