Abstract: Novel herbicides have the formula ##STR1## in which R is halogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 haloalkoxy, C.sub.1 -C.sub.4 alkylcarbamoyl, C.sub.1 -C.sub.4 mono- or dialkylamino, phenoxy or nitro;n is 0, 1 or 2;X is oxygen or sulfur;R.sub.1 is C.sub.2 -C.sub.8 alkyl, C.sub.3 -C.sub.6 cycloalkyl, phenyl, 2-trifluoromethylphenyl, 3-trifluoromethoxyphenyl, 4-methoxyphenyl, 4-nitrophenyl, 3,4-dichlorophenyl or benzyl;R.sub.2 is hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.3 -C.sub.6 cycloalkyl, phenyl, C.sub.3 -C.sub.6 alkenyl or C.sub.3 -C.sub.6 alkynyl; andR.sub.3 is C.sub.2 -C.sub.6 alkyl, C.sub.3 -C.sub.6 cycloalkyl, phenyl, phenyl(C.sub.1 -C.sub.2)-alkyl, 3,4-methylenedioxyphenyl or pyridyl; orR.sub.2 and R.sub.3 taken together with the nitrogen atom form a 4-7 member ring;provided that:a) if X is sulfur, R.sub.2 is not hydrogen;b) if R.sub.2 is hydrogen, R.sub.3 is alkyl, cycloalkyl or phenylalkyl.

Abstract: Novel S-benzyl thiolcarbamates are disclosed, having the formula ##STR1## in which R.sup.1 is selected from the group consisting of hydrogen and methoxy,R.sup.2 is selected from the group consisting of methyl, ethyl, and allyl, andR.sup.3 is selected from the group consisting of straight-chain C.sub.3 -C.sub.6 alkyl optionally substituted with one or two methyl groups, and allyl.The compounds are particularly effective in the control of weeds associated with rice crops.

Abstract: Herbicidal active sulfoxide and sulfone compounds and their method of use as described herein. The compounds have the following generic formula: ##STR1## wherein n is 1 or 2; R is selected from the group consisting of lower alkyl and lower haloalkyl; R.sub.1 and R.sub.

Abstract: Herbicidal active sulfoxide and sulfone compounds and their method of use as described herein. The compounds have the following generic formula: ##STR1## wherein n is 1 or 2; R is selected from the group consisting of lower alkyl and lower haloalkyl; R.sub.1 and R.sub.

Abstract: Thiocarbamates are prepared by a process comprising reacting an aqueous solution of a thiocarbamate salt with an organic halide in the presence of a catalytic amount of a quaternary ammonium salt having the formula(R.sup.4 R.sup.5 R.sup.6 R.sup.7 N).sup.+ Y.sup.-in which R.sup.4 and R.sup.5 are independently selected from the group consisting of C.sub.1 -C.sub.25 alkyl and C.sub.2 -C.sub.25 alkenyl, R.sup.6 and R.sup.7 are independently selected from the group consisting of C.sub.6 -C.sub.25 alkyl and C.sub.6 -C.sub.25 alkenyl, and Y.sup.- is an anion selected from the group consisting of chloride and bromide; and separating the thiocarbamate from the aqueous solution.

Abstract: A mixture of cis and trans isomers of S-isopropyl-1-(5-ethyl-2-methylpiperidinecarbothioate) has been found to have improved herbicidal properties in contrast to the trans isomer alone. Preferably the mixture contains at least about 20%, most preferably between about 60 and about 65%, of the cis isomer.The S-isopropyl-1-(5-ethyl-2-methylpiperidinecarbothioate) having a desired amount of cis isomer can be produced by a two-step process comprising hydrogenation of 2-methyl-5-ethyl pyridine using a catalyst comprising rhodium supported on activated carbon to produce 2-methyl-5-ethyl piperidine and reacting the piperidine with isopropyl chlorothiolformate.

Abstract: A mixture of cis and trans isomers of S-isopropyl-1-(5-ethyl-2-methylpiperidinecarbothioate) has been found to have improved herbicidal properties in contrast to the trans isomer alone. Preferably the mixture contains at least about 20%, most preferably between about 60 and about 65%, of the cis isomer.The S-isopropyl-1-(5-ethyl-2-methylpiperidinecarbothioate) having a desired amount of cis isomer can be produced by a two-step process comprising hydrogenation of 2-methyl-5-ethyl pyridine using a catalyst comprising rhodium supported on activated carbon to produce 2-methyl-5-ethyl piperidine and reacting the piperidine with isopropyl chlorothiolformate.

Abstract: Novel compounds having the formula ##STR1## in which X is hydrogen, mono- or dihalo or 2-methyl; Y is oxygen or sulfur; R is alkyl, lower alkenyl, chloro-lower alkenyl, carbomethoxymethyl or methyl-thiomethyl; and R.sub.1 is lower alkyl, lower alkenyl or p-chlorobenzyl, provided that if X is 4-chloro, R is other than methyl-thiomethyl. The novel compounds of this type possess aphicidal activity.Also disclosed is a novel process for making O-(substituted)benzyl thiocarbamate intermediates for these compounds.

Abstract: Novel compounds having the formula ##STR1## in which X is hydrogen, mono- or dihalo or 2-methyl; Y is oxygen or sulfur; R is alkyl, lower alkenyl, chloro-lower alkenyl, carbomethoxymethyl or methyl-thiomethyl; and R.sub.1 is lower alkyl, lower alkenyl or p-chlorobenzyl, provided that if X is 4-chloro, R is other than methyl-thiomethyl. The novel compounds of this type possess aphicidal activityAlso disclosed is a novel process for making O-(substituted)benzyl thiocarbamate intermediates for these compounds.

Abstract: Intermediate compounds useful for manufacturing herbicidal active sulfoxide and sulfone compounds are described herein. The compounds have the following generic formula: ##EQU1## wherein R is selected from the group consisting of lower alkyl and haloalkyl; R.sub.1 and R.sub.2 taken together can form a heterocyclic ring structure having from 2 to 10 carbon atoms or alkyl substituted heterocyclic ring structure. The heterocyclic ring can be provided with cross-bonding.