HERBICIDAL ARYL TRIAZOLINONES

Abstract: Herbicidal compounds of formula (I) in which, for example, X is Br, Cl or F; Y is Cl or Br, R<2> is CHF2, R<3> is CH3, R is lower alkyl and R<1> is H, Na, lower alkyl or -SO2R.

Description: HERBICIDAL ARYL TRIAZOLINONES. The invention described in this application per¬ tains to weed control in agriculture, horticulture, and other fields where there is a desire to control unwanted plant growth. More specifically, the present application describes certain herbicidal aryl tria- zolinones, compositions of them, methods of preparing them, and methods for preventing or destroying unde- sired plant growth by preemergence or postemergence application of the herbicidal compositions to the locus where control is desired. The present compounds may be used to effectively control a variety of both grassy and broadleaf plant species. The present invention is particularly useful in agriculture; a number of the compounds described herein show a selec¬ tivity favorable to certain crops (e.g. soybeans on preemergence .treatment) at application levels which inhibit the growth of or destroy a variety of weeds. One aspect of this invention relates to herbi¬ cidal .compounds of the general formula (Formula I) wherein X is bromine, chlorine, or fluorine or alkyl (e.g. CH ) or haloalkyl (e.g. CF ) ; Y is bromine, chlorine, fluorine, .methyl, halo¬ alkyl (e.g. FCH- or CF_), nitro, a radical of the formula R 8 OCH 2 -, R 8 SCH 2 -, R 8 SOCH 2 - or R 8 S0 2 CH 2 - where R is C,-C,alkyl, C.-C-alkenyl, or C--C- alkynyl (e.g., CH 3 OCH 2 -, CH.-SCH 2 -, CH 2 =CHCH 2 OCH-,- CH 2 =CHCH 2 SCH 2 -, CHΞCCH 2 OCH 2 -, or CH-iC-CH-SO.-) ; R 8 may also be phenyl (or phenyl substituted with e.g., halogen, alkyl, haloalkyl), 3 R may be halogen (e.g. chlorine), alkyl (e.g. of 1 to 5 carbon atoms), haloalkyl (e.g. of 1 to 5 carbon atoms such as difluoromethyl) , alkoxyalkyl (e.g. of 2 to 6 carbon atoms such as methoxymethyl) , cyanoalkyl (e.g. of 2 to 6 carbon atoms such as cyano- methyl), arylalkyl such as benzyl, alkylthio (e.g. of 1 to 3 carbon atoms such as methylthio) or the corre¬ sponding alkylsulfinyl or alkylsulfonyl, or alkylthio- alkyl (e.g., of 1 to 3 carbon atoms independently with respect to each alkyl, such as methylthiomethyl) or the corresponding alkylsulfinylalkyl or alkylsulfonyl- alkyl; 2 R may be alkyl (e.g. of 1 to 5 carbon atoms), lower alkoxy (e.g. methoxy) , haloalkyl (e.g. of 1 to 5 carbon atoms, such as CHF 2 or CH 2 CH-,CH-,F), alkenyl of 2 to 5 carbon atoms (e.g. allyl), alkynyl of 3 to 5 carbon atoms (e.g. propargyl), cyanoalkyl (e.g. CH 2 CN or CH 2 CH 2 CN) , thiocyanoalkyl (e.g. CH 2 SCN) or a group of the formula -alkylene-Y -R in which said alkylene group (e.g. -CH--) has 1 to 5 carbon atoms, Y 1 being oxygen or S(O) in which r 5 r is 0 to 2, and R being alkyl (e.g. of 1 to 5 carbon atoms such as methyl), alkenyl of 2 to 5 carbon atoms (e.g. allyl) or alkynyl of 3 to 5 carbon atoms (such as propargyl) ; R may be alkyl (such as straight chain or branched chain lower alkyl, e.g. methyl, ethyl, propyl), haloalkyl (such as CF_ or CHF_), dialkylamino, carboxy ethyl, hydroxy or aryl (such as phenyl, optionally substituted with one or more of: halogen such as Cl, Br or F; alkyl such as lower alkyl, e.g. methyl; alkoxy such as lower alkoxy, e.g. methoxy; cyano; cyanomethyl; nitro; a ino; aryl- amino such as phenylamino; mono- and dialkyla ino such as methylamino or dimethylamino; carboxyl; alkoxyσar- bonyl such as -COOC-H-; alkoxyalkyl such as alkoxymethyl of 2 to 4 carbon atoms; alkoxycarbonyl- alkyl such as -CH 2 COOC 2 H_; benzyl; or hydroxy) • R may be hydrogen, alkyl (e.g. straight or branched chain lower alkyl such as methyl, ethyl," propyl, isopropyl or butyl), benzyl, haloalkyl (e.g. CHF 2 or CH 2 CH 2 CH 2 ), alkoxy (e.g. methoxy), S0 2 R, alkynyl (such as propargyl), alkenyl (such as allyl), a group of the formula -alkylene-SO-R (in which, for example, said alkylene group (e.g. -CH 2 ~) has 1 to 4 carbon atoms, alkoxymethyl (such as meth- oxymethyl, cyanomethyl, carboxymethyl (including salts thereof) or alkoxycarbonylme hyl. R and R together may be a divalent radical such as alkylene (e.g. of 1 to 10 carbon atoms such as methylene or 1,3-propylene) . R m y also be a salt-forming group such as a metal (e.g. Na, K or Ca) or ammonium (e.g. NH. or lower alkyl-substituted ammonium) or sulfonium or sulfoxonium (such as salts of bases of the formula R"- S(0) where R" is, for instance, lower alkyl (e.g. C--C- alkyl) and n is zero or one, e.g. the trimethylsulfoxonium salt. In each aspect of the invention, it is often preferable that any alkyl, alkenyl, alkynyl or alkylene radical have less than 6 carbon atoms. Representative compounds according to the inven¬ tion are shown in Table 1 below. The compounds of this invention are preferably those whose Methoxy Analog or Propargyloxy Analog is a herbicide. The term "Methoxy Analog" is used here to designate a compound which is otherwise identical except that it has a methoxy group instead of the -N-SO-R group of said compound. The term "Propargyl- oxy Analog" is similarly used here for a compound which is otherwise identical except that it has a propargyloxy group instead of the -N-SO-R group of A 1 said compound. The compounds of this invention preferably have Methoxy Analogs and Propargyloxy Analogs of marked herbicidal properties. For instance said Analogs of the preferred compounds show at least 50% kill of at least one of the following species of plants when applied under at least one of the following modes at the rate of 0.5 kg/ha, and more preferably show such kill of at least 50% when applied at the rate of 0.1 kg/ha: Species: velvetleaf (Abutilon theophrasti) , green foxtail (Setaria viri-dis); Modes: pre-emergent, post-emergent. Testing for such herbicidal activity may be carried out in the manner described below (under the heading "Herbicidal Activity"). The compounds of this invention may be prepared by the use of steps generally described in the litera¬ ture or by methods analogous or similar thereto and within the skill of the art. In the Examples below an arylamine is treated to form the corresponding aryl hydrazine whose hydrazine portion is then modified to form a triazolinone ring. Thereafter the benzene ring of the intermediate is nitrated, the nitro group is reduced to form an a ino group, which is then treated with RSO-C1 or (RSO-)-O to convert it to an -N(R )SO_R group (e.g. by using a weak base such as pyridine, as in Example 6A below, or NaHCO_) or to an —N(SO-R)- group (as in Examples 2, 5, 9, 12, 14 or 17). The compound having the -N(SO_R) 2 group may then be treated (as with a base such as NaOH) to form the corresponding -NR SO-R group, where R 1 is a salt-forming group (e.g. Na) ; this may then be treated with an acid to form the corresponding (acidic) -NHSO^R group. Subsequent alkylation (as by treatment with the appropriate alkyl halide as in Example 7) forms the corresponding -NSO-R group; _ R substituents other than alkyl may be introduced similarly. When the reaction sequence involves RS0_C1 treatment of an intermediate having hydrogen on the 4-nitrogen of the triazolinone ring, that hydrogen may also be replaced, during such treatment, by RSO_- to form an intermediate (such as compound 36 in table 1 below, which has 3 RSO-- groups) from which the RSO_- group on said 4-nitrogen may be removed readily by the treatment with the base, after 2 which the appropriate R group may be substituted on said 4-nitrogen. In the Examples the modification of the hydrazine group to form a triazolinone ring is effected by reac¬ tion with pyruvic acid (forming the hydrazone) and then with a phosphoryl azide. Other techniques for this include treating the substituted phenylhydrazine with any of the following four types of reagents: (a) an inner salt of a 3-(l-iminoalkylmer- capto)-l-propanesulfonic acid (which may be prepared according to Reid and Schmidt, Ann. Chem. 676, 114 (1964) from 1,3-propanesultone and a thioa ide), to form an amidrazone followed by reaction with a source of phosgene, as by the following reaction sequence (which is also illustrated in Example 15 below), > amidrazone in which "Ar" is aromatic ' as described below. (b) An imidate ester of the formula ® H2C1© II R c C-OR d to form the corresponding amidrazone (as described, for instance, in the article by Neilson et al "The Chemistry of Amidrazones" : Chem. Rev. JO.' 151(1970) at page 156), followed by reaction with a source of phos- c d gene, as in (a) above, R and R being alkyl or other suitable radical. (c) A compound of the formula (where R and R are lower alkyl) in the presence of a base according to the following sequence: Rl 0 I R a OC=NCOOR b + ArNHNH 2 -> Ar-N N-K in which R is defined above, e.g. methyl; (d) A haloalkylnitrile (e.g. a fluoroalkyl, fluorochloroalkyl or fluorobromoalkyl nitrile such as C1CF-CN, followed by reaction with a source of phos¬ gene, so that the reaction may proceed along the following lines, for instance to form the aryl 3-haloalkyl triazoline, thus: ArHU34H 2 ♦ C1CF 2 C>. or C0C1 2 In Examples 1, 8 and 13 below two halogen substi- tuents are present on the "Ar" portion of the molecule before the triazoline ring is formed; that is, the Ar portion of the aryl hydrazine has halo substituents at its 2 and 4 positions. Instead, in each of the pro¬ cesses illustrated above (and in the process of those Examples 1, 8 and 13) one or both of the halogens may be placed on Ar after the triazoline ring is formed. Thus the Ar group of the arylamine (and of the corre¬ sponding hydrazine formed therefrom) may be phenyl or onohalophenyl (e.g. 2-fluorophenyl) or nitrophenyl (e.g. 3-nitrophenyl) or monohalonitrophenyl (e.g. 2-fluoro-5-nitrophenyl) and the aryl triazoline formed therefrom may then be treated to (a) alkylate the nitrogen at the 4-position of the triazoline ring (in known manner, e.g. with an alkyl or fluoroalkyl halide, such as with CICHF^, at a temperature of, say, 50 to 150 β C) to add the preferred - CHF substituent) and (b) to introduce additional substituents onto the aromatic ring, as by halogena- tion with chlorine or bromine (e.g. by reacting with Cl 2 , Br-, or S0-,C1 2 at a temperature of, say, 20 to 150°C). For instance the alkylation of the nitrogen at the 4-position may be effected first, after which the nitro group (if present) may be reduced to an a ino group in conventional manner, the amino group may be converted to the organic sulfonyl- amino group (e.g. in the manner shown in the Examples using, for instance, a temperature below 60 β C such as -10 to 50 β C in the presence of a suitable base and inert solvent), after which the compound may be halo- genated as indicated above to place the halogen sub- stitutent or substituents on its benzene ring. For instance, for making one preferred class of compounds of the invention in which the benzene ring has a 2-fluoro substituent, the starting material may be 2-fluoro-5-nitrophenylhydrazine, which may be treated as described above to produce successively a series of intermediates such as: l-(2-fluoro-5-nitrophenyl)-4,5-dihydro-3-methyl- l,2,4-triazol-5(lH)-one, then 1-(2-fluoro-5-nitrophenyl)-4,5-dihydro-4-difluoro- methyl-3-methyl-l,2,4-triazol-5(lH)-one, then 1-(2-fluoro-5-aminophenyl)-4,5-dihydro-4-difluoro- methyl-3-methyl-l,2,4-triazol-5(lH)-one, then the corresponding compound having an -N-SO-,R R 1 group at the 5-position of the benezene ring such as 1-C2- luoro-5-(N-ethylsulfonyl)aminophenyl3-4,5-dihydro- 4-difluoromethyl-3-methyl-l,2,4-triazol-5(1H)-one, followed by halogenation to place, for instance, a chloro or bromo substituent at the 4-position of the benzene ring. Instead of alkylating at the 4-position of the ring triazoline at an early stage, e.g. prior to altering the nitro group, this alkylation step may be delayed until after the above-described halogenation of the benzene ring. Another series of intermediates comprises: 1-(5-nitrophenyl)-4,5-dihydro-3-methyl-l,2,4- triazol-5(lH)-one, then 1-(5-nitrophenyl)-4,5-dihydro-4-difluoromethyl-3- methyl-1,2,4-triazol-5(lH)-one, then 1-(5-aminophenyl)-4,5-dihydro-4-difluoromethyl-3- methyl-1,2,4-triazol-5(1H)-one, then the corresponding compound having an -N-SO-.R R 1 group at a meta-position on the benzene ring such as l-[5-(N-ethylsulfonyl)aminophenyl -4,5-dihydro-4- difluoromethyl-3-methyl-l,2,4-triazol-5(lH)-one, followed by halogenation to place, for instance, two chloro (or bromo) substituents at the 2- and 4-positions of the benzene ring. Variations in the sequence in which the reactions are carried out will produce other intermediates such as: l-(2-chloro-5-nitrophenyl)-4,5-dihydro-4-difluoro- me hyl-3-methyl-l,2,4-triazol.-5(lH)-one, which may be converted to the corresponding 2-fluoro-5-ni.trophenyl compound by appropriate treatment with KF to replace the 2-σhloro substituent by a 2-fluoro substituent; also, l-(2-fluorophenyl)-4,5-dihydro-3-methyl- 1,2,4-triazol-5(lH)-one, which may be converted to l-(2-fluorophenyl)-4,5-dihydro-4-difluoromethyl-3- methyl-1,2,4-triazol-5(lH)-one which may then be chlo¬ rinated, as by appropriate treatment with S0 2 C1-,, to the corresponding 2-fluoro-4-chlorophenyl compound. Another sequence involves formation of: 2-fluoro-4-nitrophenylhydrazine, then l-(2- luoro-4-nitrophenyl)-4, 5-dihydro-3-methyl- 1, 2,4-triazol-5(lH)-one, then l-(2-fluoro-4-nitrophenyl)-4,5-dihydro-4-difluoro- me hyl-3-methyl-l, 2,4-triazol-5(1H)-one, then 1-(2-fluoro-4-aminophenyl)-4,5-dihydro-4-difluoro- methyl-3-methyl-l, ,4-triazol-5(lH)-one, followed by treatment to replace the amino group by a chlorine (as by treatment with NaNO_/HCl and then CuCl). Similarly, when the reagen (s) used to react with the aryl hydrazine are such as to produce a tria¬ zolinone having a haloalkyl (e.g. CHF 2 ) group instead of an alkyl group on the carbon at the 3-posi- tion of the heterocyclic ring, the series of interme- diates may include, successively (from 2-fluoro-5- nitrophenylamine, and then its hydrazine) such compounds as: l-(2-fluoro-5-nitrophenyl)-4,5-dihydro-3-difluoro- methyl-1,2,4-triazol-5(1H)-one, then l-(2-fluoro-5-nitrophenyl)-4,5-dihydro-4-methyl (or difluoromethyl)-3-difluoromethyl-1,2,4-triazol- 5(lH)-one, then l-(2-fluoro-5-aminophenyl)-4,5-dihydro-4-methyl (or difluoromethyl)-3-difluoromethyl-1,2,4-triazol-_ 5(lH)-one, then the corresponding compound having an group at the 5-ρosition of the benzene ring such as 1-C2-fluoro-5-(N-ethylsulfonyl)aminophenyl -4,5- dihydro-4-methyl (or difluoromethyl)-3-difluoromethyl-- 1,2,4-triazol-5(1H)-one, followed by halogenation to place, for instance, a chloro or bromo substituent at the 4-position of the benzene ring. Another series of intermediates, from 5-nitro- phenylamine includes: l-(5-nitrophenyl)-4,5-dihydro-3-difluoromethyl- 1,2,4-triazol-5(1H)-one, then " 1-(5-nitrophenyl)- 4,5-dihydro-4-me h l (or difluoromethyl)-3-difluoro- methyl-1,2,4-triazol-5(1H)-one, then l-(5-aminophenyl)-4,5-dihydro-4-methyl (or di- fluoromethyl)-3-difluoromethyl-1,2,4-triazol-5(IH)-one, then the corresponding compound having an -N-SO-,R 11 ^ 5 R group at a meta-position on the benzene ring such as 1-[5-(N-ethylsulfonyl)aminophenyl -4,5-dihydro- 4-methyl or difluoromethyl)-3-difluoromethyl-1,2,4- triazol-5(lH)-one, 0 followed by halogenation to place, for instance, two chloro (or bromo) substituents at the 2- and 4-positions of the benzene ring. Variations in the sequence in which the reactions are carried out will produce other intermediates such 5 as: 1-(2-chloro-5-nitrophenyl)-4,5-dihydro-4-(methyl or difluoromethyl)-3-difluoromethyl-1,2,4-triazol- 5(lH)-one, which may be converted to. he corresponding 2-fluoro-5-nitrophenyl compound by appropriate o treatment with KF to replace the 2-chloro substituent by a 2-fluoro substituent; also, l-(2-fluorophenyl)-4,5-dihydro-3-difluoro¬ methyl-1, 2,4-triazol-5(IH)-one, which may be converted to 5 l-(2-fluorophenyl)-4,5-dihydro-4-methyl(or difluoromethyl)-3-methyl-l,2,4-triazol-5(lH)-one which may then be chlorinated, as by appropriate treatment with S0-,C1 2 to the corresponding 2-fluoro-4- chlorophenyl compound. 30 Another sequence involves formation of: 2-fluoro-4-nitrophenylhydrazine, then l-(2-fluoro-4-nitrophenyl)-4,5-dihydro-3-difluoro¬ methyl-1,2,4-triazol-5(IH)-one, then 1-(2- luoro-4-nitrophenyl)-4,5-dihydro-4-methyl ,_ (or difluoromethyl)-3-difluoromethyl-1,2,4-triazol- 5 (lH) -one, then 1-(2-fluoro-4-aminophenyl)-4,5-dihydro-4-me hyl (or difluoromethyl)-3-difluoromethyl-1,2,4-triazol- 5(lH)-one, followed by treatment to replace the amino group by a chlorine (as by treatment with NaN0-,/HCl and then CuCl) . The following Examples illustrate the preparation of the compounds of this invention. In those Examples 2 the hetercyclic ring is described as: Δ -1/2,4-tria- zolin-5-one; that is a synonym for: dihydro-1,2,4- triazol-5(IH)-one. EXAMPLE 1 SYNTHESIS OF l-(5-AMINO-4-CHLORO-2-FLUORO- 2 PHENYL)-3-METHYL-4-DIFLUOROMETHYL-Δ -1,2,4- TRIAZOLIN-5-ONE AS AN INTERMEDIATE Step A Synthesis of 2-Fluoroacetanilide as an Intermediate To a stirred solution of 100 g (0.9 mole) of 2-fluoroaniline in 200 ml of water was added 105 ml (1.1 moles) of acetic anhydride. Upon completion of addition the reaction mixture was filtered to collect a solid. The solid was dried to yield 105 g of 2-fluoroacetanilide; m.p. 74-76 β C. The reaction was repeated several times. Step B Synthesis of 4-Chloro-2-fluoroacetanilide as an Intermediate To a stirred solution of 180.0 g (1.17 moles) of 2-fluoroacetanilide in 210 ml of £-dioxane was slowly added dropwise 173.4 g (9.29 moles) of sulfuryl chloride. Upon completion of addition the reaction mixture stirred at ambient temperature for 16 hours. A solid was collected by filtration, washed with water, and dried to yield 155 g of 4-chloro-2-fluoro- - acetanilide; .p. 147-148°C. Step C Synthesis of 4-Chloro-2-fluoroaniline as an Intermediate To a stirred solution of 155 g (0.83 mole) of 4-chloro-2-fluoroacetanilide in 400 ml of ethanol was added dropwise a solution of 72.0 g (1.8 moles) of sodium hydroxide in 100 ml of water. Upon completion of addition the reaction mixture was heated under reflux for three hours. The reaction mixture was cooled to ambient temperature and extracted with diethyl ether. The combined extracts were concen¬ trated, under reduced pressure to a residual oil. The oil was distilled under reduced pressure to yield 81.0 g of 4-chloro-2-fluoroaniline; b.p. 83-85/12 mm. The reaction was repeated several times. Step D Synthesis of Pyruvic Acid, 4-chloro-2- fluorophenylhydrazone as an Intermediate Under a nitrogen atmosphere, a stirred solution of 20.0 g (0.137 mole) of 4-chloro-2-fluoroaniline in 162 ml of concentrated hydrochloric acid was cooled to -9°C and a solution of 9.5 g (0.137 mole) of sodium nitrite in 50 ml of water was added dropwise at a rate to maintain the reaction mixture temperature at -9°C. The complete addition required 30 minutes. The reaction mixture was stirred for an additional one hour at -9°C to 0°C, then a solution of 68.1 g (0.30 mole) of stannous chloride in 68 ml of concentrated hydrochloric acid was added dropwise ' at a rate to maintain the reaction mixture temperature at -9°C to 0 β C. The complete addition required 40 minutes. The reaction mixture stirred at -9°C to 0°C for an addi¬ tional 30 minutes, then was allowed to warm to ambient temperature where it stirred for two hours. Water, 110 ml, was added to the reaction mixture, and then a solution of 12.2 g (0.137 mole) of pyruvic acid in 125 ml of water was added dropwise during a five minute period. Upon completion of addition the reac¬ tion mixture stirred an additional 30 minutes then was filtered to collect a solid. The solid was washed with water and dried to give 27.7 g of pyruvic acid, 4-chloro-2-fluorophenylhydrazone; m.p. 162-163°C. The reaction was repeated several times. Step E Synthesis of l-(4-chloro-2-fluorophenyl)- 2 3 3--mmeetthhyyll--ΔΔ 2 --:1,2,4-triazolin-5-one as an Intermediate To a stirred suspension of 25.4 g (0.110 mole) of pyruvic acid, 4-chloro-2-fluorophenylhydrazone in 200 ml of toluene was added 11.1 g (0.11 mole) of triethylamine. The reaction mixture became homo¬ geneous and 30.3 g (0.11 mole) of diphenylphosphoryl azide was added. Upon completion of addition the reaction mixture was heated to reflux where it stirred for two hours. The reaction mixture was cooled to ambient temperature and extracted with 300 ml of aqueous IN sodium hydroxide. The extract was neu¬ tralized with concentrated hydrochloric acid and a solid precipitate collected by filtration. The solid was washed with water and dried to yield 21.1 g of 2 1-(4-chloro-2-fluorophenyl)-3-methyl-Δ -1,2,4-tria- zolin-5-one; m.p. 189-191 'β C. The reaction was repeated several times. - - Step F Synthesis of l-(4-chloro-2-fluorophenyl)- 2 3-methyl-4-difluoromethyl-Δ -1,2,4-tria- zolin-5-one as an Intermediate A stirred solution of 27.4 g (0.12 mole) of 2 1-(4-chloro-2-fluorophenyl)-3-methyl-Δ -1,2,4-tria- zolin-5-one, 13.5 g (0.24 mole) of powdered potassium hydroxide, and 3.9 g (0.012 mole) of tetrabutylammo- nium bromide in 500 ml of tetrahydrofuran was cooled in an ice bath and chlorodifluoromethane was bubbled into the reaction mixture. The ice bath was removed and chlorodifluoromethane continued to bubble into the reaction mixture until condensation of it was observed on a dry ice condenser attached to the reaction ves- sel. Upon completion of addition the reaction mixture stirred at ambient temperature for 16 hours. An addi¬ tional 6.7 g (0.12 mole) of powdered potassium hydroxide was added to the reaction mixture and it was again saturated with chlorodifluoro ethane. The reac- tion mixture was stirred for two hours then diluted with water. The mixture was extracted with diethyl ' ether and the combined extracts washed with water. The organic layer was dried with sodium sulfate and filtered. The filtrate was concentrated under reduced pressure to a residue. The residue was dissolved in methylene chloride and passed through a pad of silica gel. The eluate was concentrated under reduced pres¬ sure to a residual solid. The solid was recrystal- lized from methylene chloride-heptane to yield 9.5 g of l-(4-chloro-2-fluorophenyl)-3-methyl-4-difluoro- 2 methyl-Δ -l,2,4-tetrazolin-5-one as a solid. The reaction was repeated several times. Step G Synthesis of l-(4-chloro-2-fluoro-5-nitro- 2 phenyl)-3-methyl-4-difluoromethyl-Δ - 1,2,4-triazolin-5-one as an Intermediate To a stirred solution of 6.1 g (0.022 mole) of l-(4-chloro-2-fluorophenyl)-3-methyl-4-difluoromethyl- 2 Δ -1,2,4-triazolin-5-one in 9 ml of concentrated sulfuric acid was slowly added 1.96 ml of 70% nitric acid, while maintaining the reaction mixture tempera- ture at 25°C. Upon completion of addition the reac¬ tion mixture was stirred at 25°C for 30 minutes, then poured into ice water. The resultant solid was collected by filtration. The solid was dissolved in methylene chloride and passed through a pad of silica gel. The eluate was subjected to column chromato¬ graphy on silica gel. Elution was completed using l:l-petroleum ether:methylene chloride. The appro¬ priate fractions were combined and concentrated under reduced pressure to yield 3.0 g of l-(4-chloro-2- 2 fluoro-5-nitrophenyl)-3-methyl-4-difluoromethyl-Δ - 1,2,4-triazolin-5-one; m.p. 102-104°C. The reaction was repeated several times. Step H Synthesis of l-(4-amino-4-chloro-2-fluoro- 2 2 pphheennyyll))--33--mmeetthhyyll--44--ddiifflluuoorroommeetthhyyll--ΔΔ -- 1, 2,4-triazolin-5-one as an Intermediate To a stirred solution of 4.0 g (0.012 mole) of 1-(4-chloro-2-fluoro-5-nitrophenyl)-3-methyl-4-di- fluoromethyl-Δ -l,2,4-triazolin-5-one in 50 ml of acetic acid and 20 ml of water was added portionwise 4.0 g. (0.072 mole) of powdered iron at a rate to main¬ tain the reaction mixture temperature below 35°C. Upon completion of addition the reaction mixture stirred at 25-30°C for two hours. The reaction mixture was diluted with diethyl ether with stirring, then was filtered through diatomaceous earth. The stirred filtrate was made basic with aqueous 10% sodium bicarbonate solution and solid potassium carbonate. The organic layer was separated, washed with three portions of water, then dried with sodium sulfate. The mixture was filtered and the filtrate concentrated under reduced pressure to a residue. The residue was purified by column chromatography on silica gel using methylene chloride:acetone as an eluent. The appropriate fractions were combined and concentrated under reduced pressure to yield 3.1 g of 1-(5-amino-4-chloro-2-fluorophenyl)-3-methyl-4-di- 2 fluoromethyl-Δ - 1,2,4-triazolin-5-one; m.p. 128-129 β C. The nmr and the ir spectra were consistent with the proposed structure. The reaction was repeated several times. EXAMPLE 2 SYNTHESIS OF l-[4-CHLORO-2-FLUORO-5-[BIS(N- METHYLSULFONYL)AMINO3PHENYL3-3-METHYL-4- DIFLUOROMETHYL-Δ 2 -l,2,4-TRIAZOLIN-5-ONE (COMPOUND 24) A stirred solution of 1.0 g (0.003 mole) of 1-(5-amino-4-chloro-2-fluorophenyl)-3-methyl-4-di- fluoromethyl-Δ 2-l,2,4-triazolin-5-one (prepared as • in Example 1) and 0.76 g (0.008 mole) of triethylamine in 20 ml of methylene chloride was cooled in an ice/ acetone bath and 0.83 g (0.007 mole) of methanesul- fonyl chloride was added dropwise at a rate to main¬ tain the reaction mixture temperature below 0°C. The complete addition required five minutes. Upon comple¬ tion of addition the reaction mixture was allowed to warm to ambient temperature where it stirred for 16 hours. After this time the reaction mixture was con- - i - centrated under reduced pressure to.a residue. The residue was purified by column chromatography on silica gel using 50:1-methylene chloride: cetone as an eluent. The appropriate fractions were combined and 5 concentrated under reduced pressure to a solid. The solid was recrystallized from acetone/heptane to yield 1.4 g of l-[4-chloro-2-fluoro-5-[bis(N-methylsul- 2 fonyl)amino_phenyl3-3-methyl-4-difluoromethyl-Δ - 1,2,4-triazolin-5-one; m.p. 180-195°C. 0 The nmr and the ir spectra were consistent with the proposed structure. Analysis calc'd for C 12 H 12 C1F 3 N 4°5 S 2 : C 32 - 11; H 2 ' 6 ^ ' N 12.48 Found: C 31.98; H 2.32; N 12.15. 5 EXAMPLE 3 SYNTHESIS OF l-[4-CHL0R0-2-FLU0R0-5-(N-METHYL- SULFONYLAMINO)PHENYL3-3-METHYL-4-DIFLUOROMETHYL- Δ 2 -l,2,4-TRIAZ0 ' LIN-5-0NE (COMPOUND 3) 0 To a stirred solution of 1.0 g (0.002 mole) of l-[4-chloro-2-fluoro-5-[bis(N-me hylsulfonyl)amino3- phenyl3-3-methyl-4-difluoromethyl-Δ -1,2,4-tria- zolin-5-one (prepared as in Example 2) in 25 ml of methanol was added a solution of 0.17 g (0.004 mole) 5 of sodium hydroxide in 3 ml of water. Upon completion of addition the reaction mixture was stirred for 15 minutes then poured into 100 ml of water. The mixture was neutralized with concentrated hydrochloric acid and the solid precipitate collected by filtration. o The solid was dried to yield 0.65 g of l-_4-chloro-2- * fluoro-5-(N-methylsulfonylamino)phenyl3-3-methy1-4-di- 2 fluoromethyl-Δ -1,2,4-triazolin-5-one; m.p. 156- 159°C. The nmr spectrum was consistent with the proposed 5 structure. Analysis calc'd for C H C1F 3 N 4 0 S: C 34.79; H 2.65; N 14.75; Found: C 35.47; H 2.53; N 14.94. EXAMPLE 4 SYNTHESIS OF l-[4-CHL0R0-2-FLU0R0-5-[(N-ETHYL- SULFONYL-N-METHYLSULFONYL)AMINO PHENYL]-3- METHYL-4-DIFLU0R0METHYL-Δ 2 -l,2,4-TRIAZOLIN-5-ONE (COMPOUND 28) This compound was prepared in a manner analogous to that of Example 2, using 0.31 g (0.0009 mole) of 1-C4-chloro-2-fluoro-5-(N-methylsulfonylamino)phenyl3- 2 3-methyl-4-difluoromethyl-Δ -1,2,4-triazolin-5-one, 0.14 g (0.0011 mole) of ethanesulfonyl chloride, and 0.12 g of triethylamine in 5 ml of methylene chlo¬ ride. The yield of l-[4-chloro-2-fluoro-5-(N-ethyl¬ sulfonyl-N-methylsulfonyl)amino3phenyl3-3-methyl-4- 2 di luoromethyl-Δ -l, 2,4-triazolin-5-one was 0.33 g; m.p. 128-131.5 β C. The nmr spectrum was consistent with the proposed structure. Analysis calc'd for C H- .CIP O.S,: C 33.73; H 3.05; N 12.11; Found: C 33.57; H 3.17; N 12.12. EXAMPLE 5 SYNTHESIS OF l-[4-CHLORO-2-FLUORO-5-[BIS(N- ETHYLSULFONYL)AMINO3PHENYL3-3-METHYL-4-DI- FLUOROMETHYL-Δ 2 -l, 2,4-TRIAZOLIN-5-ONE (COMPOUND 38) This compound was prepared in a manner analogous to that of Example 2 using 1.0 g (0.003 mole) of l-(5-amino-4-σhloro-2-fluorophenyl)-3-methyl-4-di- 2 fluoromethyl-Δ -I,2,4-triazolin-5-one (prepared as in Example 1) 0.9 g (0.007 mole) of ethanesulfonyl chloride and 0.7 g (0.007 mole) of triethylamine in methylene chloride. The yield of l-[4-chloro-2- fluoro-5-Cbis(N-ethylsulfonyl)amino3 henyl3-3-methy1- 4-difluoromethyl-Δ 2-1,2,4-triazolin-5-one was 0.6 g; m.p. 143-144°C. The nmr spectrum was consistent with the proposed structure. The reaction was repeated several times. EXAMPLE 6 SYNTHESIS OF l-[4-CHLORO-2-FLUORO-5-(N-ETHYL- SULFONYLAMINO)PHENYL3-3-METHYL-4-DIFLUORO- METHYL-Δ 2 -!,2,4-TRIAZOLIN-5-ONE (COMPOUND 11) This compound was prepared in a manner analogous to that of Example 3, using 1.1 g (0.0022 mole) of l-[4-chloror-2-fluoro-5-[bis(N-ethylsulfonyl)amino3- 2 phenyl3-3-methyl-4-difluoromethyl-Δ -l,2,4-tria- zolin-5-one (prepared as in Example 5) and 0.17 g (0.0044 mole) of sodium hydroxide in 25 ml of methanol. The yield of l-[4-chloro-2-fluoro-5-(N- ethylsulfonylamino)phenyl3-3-methyl-4-difluoromethyl- 2 Δ -1,2,4-triazolin-5-one was 0.8 g; m.p. 162-163 β C. The nmr spectrum was consistent with the proposed structure. Analysis calc'd for C 12 H 12 C1F 3 N 4°3 S: C 37*46? H 3 - 14? N 14.56 ; Found: C 37.65; H 3.12; N 14.44. EXAMPLE 6A SYNTHESIS OF l-[4-CHLORO-2-FLUORO-5-(N- ETHYLSULFONYLAMINO)PHENYL3-3-METHYL-4- DIFLU0R0METHYL-Δ 2 -1,2,4-TRIAZOLIN-5-ONE (COMPOUND 11) A stirred suspension of 1.0 g (0.0034 mole) of 1-(4-amino-4-chloro-2-fluorophenyl)-3-methy1-4-di- fluoromethyl-Δ -1,2,4-triazolin-5-one in 5 ml of methylene chloride was cooled in an ice water bath and 0.3 ml (0.0037 mole) of pyridine was added. Upon com- 5 pletion of addition 0.33 ml (0.0035 mole) of ethane¬ sulfonyl chloride was added and the reaction mixture was stirred at 0 β C for one hour. After this time the reaction mixture was allowed to warm to ambient tem¬ perature where it stirred for 16 hours. Analysis of Q the reaction mixture by thin layer chromatography (TLC) indicated the presence of a small amount of starting material. An additional 0.05 ml of pyridine and 0.05 ml of ethanesulfonyl chloride were added and the reaction mixture was stirred at ambient tempera- 5 ture for one hour. Analysis of the reaction mixture by TLC indicated that the reaction had gone to comple¬ tion. The reaction mixture was poured into water. The organic layer was separated and the, ater layer extracted with methylene chloride. The extracts and 0 the organic layer were combined and washed in succes¬ sion with aqueous IN hydrochloric acid, aqueous saturated sodium bicarbonate solution, water, and aqueous saturated sodium chloride solution. The organic layer was dried with magnesium sulfate and 5 filtered. The filtrate was concentrated under reduced pressure to a residue. The residue was dried under high vacuum to yield 1.45 g of l-[4-chloro-2-fluoro- 5-(N-ethylsulfonylamino)phenyl3-3-methy1-4-difluoro- 2 methyl-Δ -i, 2,4-triazolin-5-one as an oily foam. o The nmr spectrum was consistent with the proposed structure. EXAMPLE 7 SYNTHESIS OF l-[4-CHL0R0-2-FLU0R0-5-[(N- ETHYLSULFONYL-N-METHYL)AMINO3PHENYL3-3-METHYL- 5 4-DIFLUOROMETHYL-Δ 2 -l, 2,4-TRIAZOLIN-5-ONE (COMPOUND 29) To a stirred suspension of 0.095 g (0.0019 mole) of sodium hydride (50% in mineral oil) in dimethyl- forma ide was added.0.7 g (0.0019 mole) of l-[4- chloro-2-fluoro-5-(N-ethylsulfonylamino) henyl -3- 2 methy1-4-difluoromethyl-Δ -1,2,4-triazolin-5-one (prepared as in Examine 6). The reaction mixture was stirred until homogeneous, approximately 15 minutes. After this time 0.28 g (0.002 mole) of methyl iodide was added to the reaction mixture, which was then stirred for 16 hours. The reaction mixture was diluted with diethyl ether and washed with water. The organic layer was dried with sodium sulfate, filtered, and concentrated under reduced pressure to a residue. The residue. was purified by column chromatography on silica gel using 50:1-methylene chloride:acetone as an eluent. The appropriate fractions were combined and concentrated under reduced pressure to yield 0.7 g of l-[4-chloro-2- luoro-5-[( -ethylsulfonyl-N-methyl)- amino3phenyl3-3-methyl-4-di luoromethyl-Δ 2-1,2,4- triazolin-5-one; m.p. 101-103.5°C. The nmr spectrum was consistent with the proposed structure. Analysis calc'd for C1-3,H1_4.C1F3-.N4.S05-: C 39.15; H 3.54; N 14.05; Found: C 39.46; H 3.57; N 13.91. EXAMPLE 8 SYNTHESIS OF 1-(5-AMIN0-4-BR0M0-2-FLU0R0- PHENYL)-3-METHYL-4-DIFLU0R0METHYL-Δ 2 -l,2,4 TRIAZ0LIN-5-0NE AS AN INTERMEDIATE Step A Synthesis of Pyruvic Acid, 4-Bromo-2-fluoro- ph'enylhydrazone as an Intermediate This compound was prepared in a manner analogous - 23 - to that of Example 1, Step D, using 24.3 g (0.128 mole) of commercially available 4-bromo-2-fluoro¬ aniline, 11.3 g (0.128 mole) of pyruvic acid, 8.8 g (0.128 mole) of sodium nitrite and 63.2 g (0.28 mole) of stannous chloride in 48 ml of water and 214 ml of concentrated hydrochloric acid. The yield of pyruvic acid, 4-bromo-2-fluorophenylhydrazone was 27.2 g; m.p, 172-173°C. The reaction was repeated several times. 0 Step B Synthesis of 1-(4-Bromo-2-fluorophenyl)-3- methyyll--Δ 2 meth Δ 2 --l1,,:2,4-triazolin-5-one as an Intermediate This compound was prepared in a manner analogous 5 to that of Example 1, Step E. The reaction was run in three batches using a total of 34.3 g (0.125 mole) of .pyruvic acid, 4-bromo-2-fluorophenylhydrazone, 35.0 (0.127 mole) of diphenylphosphoryl azide, and 12.6 g (0.125 mole) of triethylamine in 300 ml of toluene.- o The reaction mixtures were combined for isolation of product. The yield of 1-(4-bromo-2-fluorophenyl)-3- 2 methyl-Δ l,2,4-triazolin-5-one was 271.0 g, m.p. 201-203°C. The nmr spectrum was consistent with the proposed 5 structure. The reaction was repeated several times. Step C Synthesis of 1-(4-bromo-2-fluorophenyl)-3- 2 mmeetthhyyll--44--ddiifflluuoorroommeetthhyyll--Δ -1,2,4-triazolin- 5-one as an Intermediate 0 This compound was prepared in a manner analogous to that of Example 1, Step F using 13.0 g (0.048 mole) 2 of l-(4-bromo-2-fluorophenyl)-3-methyl-Δ -1,2,4- triazolin-5-one, 8.0 g (0.143 mole) of powdered potas- 5 sium hydroxide, 1.6 g (0.005 mole) of tetrabutylammo- nium bromide, and chlorodifluoromethane in 200 ml of tetrahydrofuran. The yield of l-(4-bromo-2-fluoro- 2 phenyl)-3-methyl-4-difluoromethyl-Δ -1,2,4-tria- zolin-5-one was 6.5 g. The reaction was repeated several times. Step D Synthesis of l-(4-Bromo-2-fluoro-5-nitro- 2 phenyl)-3-methyl-4-difluoromethyl-Δ - 1,2,4-triazolin-5-one as an Intermediate This compound was prepared in a manner analogous to that of Example 1, Step G using 7.0 g (0.022 mole) of l-(4-bromo-2-fluorophenyl)-3-methyl-4-difluoro- methyl-Δ -1,2,4-triazolin-5-one and 1.96 ml of 70% nitric acid in 9 ml of concentrated sulf ric acid. The yield of i-(4-bromo-2-fluoro-5-nitrophenyl)- 2 3-methyl-4-difluoromethyl-Δ -1,2,4-triazolin-5-one was 2.9 g; m.p. 99-105°C. The reaction was repeated several times. Step E Synthesis of l-(5-amino-4-bromo-2-fluoro- 2 phenyl)-3-methyl-4-difluoromethyl-Δ -1,2,4- triazolin-5-one as an Intermediate This compound was prepared in a manner analogous to that of Example 1, Step H using 2.5 g (0.007 mole) of l-(4-bromo-2-fluoro-5-nitrophenyl)-3-methyl-4-di- 2 fluoromethyl-Δ -1,2,4-triazolin-5-one and 1.5 g (0.027 mole) of powdered iron in 1 ml of water and 30 ml of acetic acid. The yield of l-(5-amino-4- 2 bromo-2-fluorophenyl)-3-methyl-4-difluoromethyl-Δ - 1, 2,4-triazolin-5-one was 1.7 g; m.p. 117-119°C. The . nmr spectrum was consistent with the proposed structure. The reaction was repeated several times. EXAMPLE 9 SYNTHESIS OF l-[4-BR0M0-2-FLU0R0-5-[BIS(N- ETHYLSULFONYL)AMINO3PHENYL3-3-METHYL-4- DIFLUOROMETHYL-Δ 2 -l,2,4-TRIAZOLIN-5-ONE (COMPOUND 40) This compound was prepared in a manner analogous to that of Example 2 using 1.6 g (0.0047 mole) of l-(5-amino-4-bromo-2-fluorophenyl)-3-methyl-4-difluoro- 2 methyl-Δ -1,2,4-triazolin-5-one (prepared as in Example 8), 1.2 g (0.0095 mole) of ethanesulfonyl chloride, and 1.0 g (0.01 mole) of triethylamine in 24 ml of methylene chloride. The yield of l-[4-bromo- 2-fluoro-5-Cbis(N-ethylsulfonyl)amino3phenyl3-3-methyl- 2 4-difluoromethyl-Δ -l,2,4-triazolin-5-one was 0.9 g; m.p. 145-146°C. The nmr spectrum was consistent with the proposed structure. Analysis calc'd for C1-4.H1_6-.BrF3_N4.05-.S2-,: C 32.25; H 3.09; N 10.75; Found: C 31.94; H 3.10; N 10.78. EXAMPLE 10 SYNTHESIS OF l-[4-BR0M0-2-FLU0R0-5-(N- ETHYLSULFONYLAMINO)PHENYL -3-METHYL-4- DIFLUO OMETHYL-Δ 2 -l,2,4-TRIAZOLIN-5-ONE (COMPOUND 13) This compound was prepared in a manner analogous to that of Example 2 using 0.52 g (0.001 mole) of l-[4-bromo-2-fluoro-5-[bis( -ethylsulfonyl)amino3- 2 phenyl3-3-methyl-4-difluoromethyl-Δ -1, 2,4-tria- zolin-5-one (prepared as in Example 9), and 0.1 g (0.0025 mole) of sodium hydroxide in 3 ml of water and 40 ml of methanol. The yield of l-[4-bromo-2-fluoro- 5-(N-ethylsulfonylamino)phenyl3-3-methyl-4-difluoro- methyl-Δ -i, 2,4-triazolin-5-one as 0.38 g; m.p. 140-141°C. The nmr spectrum was consistent with the proposed structure. EXAMPLE 11 SYSTHESIS OF l-(5-AMIN0-4-BR0M0-2-FLU0R0- PHENYL)-3,4-DIMETHYL-Δ 2 -l,2,4-TRIAZOLIN-5-ONE AS AN INTERMEDIATE Step A Synthesis of l-(4-bromo-2-fluorophenyl)-3,4- 2 ddiimmeetthhyyll--ΔΔ --;l,2,4-triazolin-5-one as an Intermediate This compound was prepared in a manner analogous to that of Example 7, using 6.0 g (0.022 mole) of 2 l-(4-bromo-2-fluorophenyl)-3-methyl-Δ -1,2, -tria- zolin-5-one (prepared as in Example 8, Step B), 4.1 g (0.029 mole) of methyl iodide, and 1.1 g (0.022 mole) of 50% sodium hydride in 50 ml of dimethylformamide. The yield of 1-(4-bromo-2-fluorophenyl)-3,4-dimethyl- 2 Δ -1,2,4-triazolin-5-one was 3.9 g; m.p. 122-123.5°C. The nmr spectrum was consistent with the proposed structure. Step B Synthesis of l-(4-Bromo-2-fluoro-5-nitro- 2 2 pphheennyyll))--33,,44--ddiimmeetthhyyll--ΔΔ --;1,2,4-triazolin- 5-one as an Intermediate This compound was prepared in a manner analogous to that of Example 1, Step G using 3.7 g (0.013 mole) 2 of 1-(4-bromo-2-fluorophenyl)-3,4-dimethyl-Δ -1,2,4- triazolin-5-one and 0.98 g (0.016 mole) of 70% nitric acid in 15 ml of concentrated sulfuric acid. The yield of l-(4-bromo-2-fluoro-5-nitrophenyl)-3,4-di- 2 mmeetthhyyll--ΔΔ 2 --i1,,22,,.4-triazolin-5-one was 2.6 g; m.p. 151.5-154.5°C. The nmr spectrum was consistent with the proposed structure. Step C Synthesis of l-(5-amino-4-bromo-2-fluoro- 2 phenyl)-3,4-dimethyl-Δ -1,2,4-triazolin-5- one as an Intermediate This compound was prepared in a manner analogous to that of Example 1, Step H using 2.3 g (0.007 mole) of l-(4-bromo-2-fluoro-5-nitrophenyl)-3,4-dimethyl- 2 Δ -1,2,4-triazolin-5-oήe and 2.3 g of powdered iron in 18 ml of water and 35 ml of acetic acid. The yield of l-(5-amino-4-bromo-2-fluorophenyl Y-3 ,4-dimethyl- 2 Δ -1,2,4-triazolin-5-one was 1.2 g; m.p. 151-155°C. The nmr spectrum was consistent with the proposed structure. EXAMPLE 12 SYNTHESIS OF l-[4-BR0M0-2-FLU0R0-5-[BIS(N- ETHYLSULFONYL)AMIN03PHENYL3-3,4-DIMETHYL- Δ 2 -l,2,4-TRIAZOLIN-5-ONE (COMPOUND 39) This compound was prepared in a manner analogous to that of Example 2, using 0.95 g (0.008 mole) of 1-(5-amino-4-bromo-2-fluorophenyl)-3,4-dimethyl- 2 Δ -l,2,4-triazolin-5-one (prepared as in Example 11), 1.0 g (0.008 mole) of ethanesulfonyl chloride, and 0.87 g of triethylamine in 25 ml of methylene chloride. The yield of l-[4-bromo-2-fluoro-5-[bis- 2 (N-ethylsulfonyl)amino3phenyl3-3,4-dimethyl-Δ - 1,2,4-triazolin-5-one was 1.4 g; m.p. 173-174.5°C. The nmr spectrum was consistent with the proposed structure. Analysis calc'd for C 14 H 18 BrFN 4°5 S 2 : C 36 * 64 ' * H 3«74? N 11.54 ; Found: C 33.72; H 3.57; N 10.64. EXAMPLE 13 SYNTHESIS OF l-(5-AMIN0-2,4-DICHL0R0PHENYL)-3- METHYL-4-DIFLUOROMETHYL-Δ 2 -l,2,4-TRIAZ0LIN-5- ONE AS AN INTERMEDIATE Step A Synthesis of Pyruvic Acid, 2,4-Dichloro- phenylhydrazone as an Intermediate To a stirred solution of 16.2 g (0.07 mole) of commercially available 2,4-dichlorophenylhydrazine hydrochloride in 100 ml of ethanol was added in one portion 9.2 g (0.11 mole) of pyruvic acid in 100 ml of water. The reaction mixture was stirred for 10 minutes and the resultant solid collected by filtra- tion to yield when dried 13.5 g of pyruvic acid, 2,4-dichlorophenylhydrazone, m.p. 193-194°C. The reaction was repeated several times. Step B Synthesis of l-(2,4-Dichlorophenyl)-3- 2 2 mmeetthhyyll--ΔΔ --11,,:2,4-triazolin-5-one as an Intermediate This compound was prepared in a manner analogous to that of Example 1, Step E using 13.6 g (0.054 mole) °f pyruvic acid, 2,4-dichlorophenylhydrazone, 14.9 g (0.054 mole) of diphenylphosphoryl azide, and 5.5 g (0.054 mole) of triethylamine in 100 ml of toluene. 2 The yield of l-(2,4-dichlorophenyl)-3-methyl-Δ - 1,2,4-triazolin-5-one was 13.0 g; m.p. 174-175°C. The reaction was repeated several times. Step C Synthesis of l-(2,4-Dichlorophenyl)-3- 2 mmeetthhyy11--44--ddiifflluuoorroommeetthhyyll--Δ -1,2,4-triazolin- 5-one as an Intermediate This compound was prepared in a manner analogous to that of Example 1, Step F using 16.0 g (0.065 mole) 2 of l-(2,4-dichlorophenyl)-3-methyl-Δ -1,2,4-tria- zolin-5-one, chlorodifluoromethane, 7.3 g (0.13 mole) of potassium hydroxide and 10.5 g (0.03 mole) of tetrabutylammonium bromide in 150 ml of tetrahydro- furan. The yield of l-(2,4-dichlorophenyl)-3-methyl- 2 4-difluoromethyl-Δ -1,2,4-triazolin-5-one was 4.1 g; m.p. 108-110°C. The reaction was repeated several times. Step D Synthesis of l-(2,4-Dichloro-5-nitrophenyl)- 2 3-methyl-4-difluoromethyl-Δ -1,2,4- triazolin-5-one as an Intermediate This compound was prepared in the manner of Example 1, Step G using 4.0 g (0.013 mole) of l-(2,4- 2 dichlorophenyl)-3-me hyl-4-difluoromethyl-Δ -1,2,4- triazolin-5-one and 1.2 ml (0.015 mole) of 70% nitric acid in 20 ml of concentrated sulfuric acid. The yield of l-(2,4-dichloro-5-nitrophenyl)-3-methyl-4-di- 2 fluoromethyl-Δ -1,2,4-triazolin-5-one was 3.0 g; m.p. 95-97 β C. The reaction was repeated several times. Step E Synthesis of l-(5-Amino-2,4-dichlorophenyl)- 3-methyl-4-difluoromethyl-Δ 2-1,2,4- triazolin-5-one as an Intermediate This compound was prepared in a manner analogous to that of Example 1, Step H using 2.5 g (0.007 mole) of 1-(2,4-dichloro-5-nitrophenyl)-3-methyl-4-difluoro- 2 methyl-Δ -1, 2,4-triazolin-5-one and 2.5 g (0.045 mole) of powdered iron in 6 ml of water and 60 ml of water. The yield of l-(5-amino-2,4-dichlorophenyl)- 2 3-me hyl-4-difluoromethyl-Δ -1,2,4-triazolin-5-one was 2.0 g; m.p. 133-135 β C. The reaction was repeated ' several times. EXAMPLE . 14 SYNTHESIS OF l-[2,4-DICHL0R0-5-[BIS-(N-METHYL- SULFONYL)AMINO3PHENYL3-3-METHYL-4-DIFLUOROMETHYL- Δ 2 -l,2,4-TRIAZ0LIN-5-0NE (COMPOUND 22) This compound was prepared in a manner analogous to that of Example 2 using 1.2 g (0.004 mole) of 1-(5-amino-2,4-dichlorophenyl)-3-methyl-4-difluoro- 2 methyl-Δ -1,2,4-triazolin-5-one (prepared as in Example 13), 0.97 g (0.009 mole) of methanesulfonyl chloride, and 0.95 g (0.009 mole) of triethylamine in 15 ml of methylene chloride. The yield of l-[2,4-di- chloro-5-Cbis(N-methylsulfonyl)amino3phenyl3-3-methyl- 2 4-difluoromethyl-Δ -1,2,4-triazolin-5-one was 1.3 g; m.p. 213-214°C. The nmr spectrum was consistent with the proposed structure. Analysis calc'd for C 12 H 12 C1 2 F 2 N 4°5 S 2 : C 30 ' 91; H 2 - 59" N 12.02 ; Found: C 31.15; H 2.43; N 12.03. EXAMPLE " 15 SYNTHESIS OF l-[2,4-DICHL0R0-5-(N-METHYL- SULFONYLAMINO)PHENYL3-3-METHYL-4-DIFLUORO- METHYL-Δ 2 -1.2,4-TRIAZOLIN-5-ONE (COMPOUND 1) This compound was prepared in a manner analogous to that of Example 3 using 0.8 g (0.002 mole) of . l-[2,4-dichloro-5-[bis(N-methyl.sulfonγl)amino3phenyl3-3- 2 methyl-4-difluoromethyl-Δ -1, 2,4-triazolin-5-one (prepared as in Example 14) and 0.14 g (0.003 mole) of sodium hydroxide in 0.3 ml of water and 10 ml of ethanol. The yield of l-[2,4-dichloro-5-(N-methylsul- 2 fonylamino)phenyl3-3-methyl-4-difluoromethyl-Δ -1,2,4- triazolin-5-one was 0.5 g; m.p. 75-78°C. The nmr spectrum was consistent with the proposed structure. Analysis calc'd for C 11 H 10 C1 2 F 2 N 4°3 S: C 34 ' 21; H 2«59? N 14.51 ; Found: C 33.98; H 2.62; N 14.20. EXAMPLE 16 SYNTHESIS OF l-(5-AMINO-2,4-DICHLOROPHENYL)-3- METHYL-Δ 2 -l,2 2,,44--TTRRIIAAZZOOLLIINN-5-ONE AS AN INTERMEDIATE Step A Synthesis of 1-(2,4-Dichloro-5-nitrophenyl)- 2 3-methyl-Δ -l, 2,4-triazolin-5-one as an Intermediate This compound was prepared in a manner analogous to that of Example 1, Step G using 6.0 g (0.025 mole) of 1-(2,4-dichlorophenyl)-3-methyl-Δ 2-l, 2,4-tria- zolin-5-one (prepared as an Example 13, Step B) and 1.9 ml (0.03 mole) of 70% nitric acid in 25 ml of concentrated sulfuric acid. The yield of l-(2,4-di- 2 chloro-5-nitrophenyl)-3-methyl-Δ -1, 2,4-triazolin- 5-one was 5.6 g as a solid. Step B Synthesis of l-(5-Amino-2,4-dichlorophenyl)- A 2 3 3--mmeetthhyyll--ΔΔ2--;1,2,4-triazolin-5-one as an Intermediate To a 500 ml Parr hydrogenation bottle was added 0.5 g of platinum oxide, .100 ml of ethanol, then 6.4 g (0.022 mole) of l-(2,4-dichloro-5-nitrophenyl)-3- 2 methyl-Δ -1,2,4-triazolin-5-one. The bottle was placed in a Parr hydrogenator and the reaction mixture shaken until the theoretical amount of hydrogen was taken up. The bottle was removed from the hydrogena¬ tor and the reaction mixture filtered. The filtrate was dried with sodium sulfate and refiltered. The filtrate was concentrated under reduced pressure to yield 4.5 g of l-(5-amino-2,4-dichlorophenyl)-3- 2 methyl-Δ -1,2,4-triazolin-5-one. The nmr spectrum was consistent with the proposed structure. EXAMPLE 17 SYNTHESIS OF l-[2,4-DICHL0R0-5-[BIS(N-ETHYL- SULFONYL)AMINO3PHENYL3-3-METHYL-4-ETHYL- SULFONYL-Δ 2 -l,2,4-TRIAZOLIN-5-ONE (COMPOUND 36) This compound was prepared in a manner analogous to that of Example 2, using 0.5 g (0.002 mole) of 1-(5-amino-2,4-dichlorophenyl)-3-methyl-Δ r l,2,4- triazolin-5-one (prepared as in Example 16), 0.8 g (0.006 mole) of ethanesulfonyl chloride and 0.7 g (0.007 mole) of triethylamine in 15 ml of methylene chloride. The yield of l-[2,4-dichloro-5-[bis(N- ethylsulfonyl)amino3phenyl3-3-methyl-4- thylsulfonyl- 2 Δ -l,2,4-triazolin-5-one was 0.5 g; m.p. 215-216°C. The nmr spectrum was consistent with the proposed structure. The reaction was repeated several times. Analysis calc'd for C 15 H 20 C1 2 N 4°7 S 3 : C 33 * 64? H 3«77* N 10.46 ; Found: C 33.88; H 3.91; N 10.68. EXAMPLE 18 SYNTHESIS OF l-[2,4-DICHL0R0-5-(N-ETHYL- SULFONYLAMINO)PHENYL -3-METHYL-Δ 2 -!,2,4- TRIAZ0LIN-5-0NE This compound was prepared in a manner analogous to that of Example 3, using 0.9 g (0.002 mole) of 1-C2,4-dichloro-5-Cbis(N-ethylsulfonyl)amino3phenyl- 2 3-methyl-4-ethylsulfonyl-Δ -1,2,4-trιazolιn-5-one (prepared as in Example 17) and 0.2 g (0.005 mole) sodium hydroxide in 0.25 ml of water and 12 ml of ethanol. The yield of l-[2,4-dichloro-5-(N-ethyl- 2 sulfonylamino)phenyl3-3-methyl-Δ -1,2,4-triazolin- 5-one was 0.5 g; m.p. 221-222.5°C. The nmr spectrum was consistent with the proposed structure. Analysis calc'd for C 10 H 10 C1 2 F 2 N 4°3 S: C 34*21; H 2 - 58* 14.51 ; Found: C 33.98; H 2.62; N 14.20. HERBICIDAL ACTIVITY The plant test species used in demonstrating the herbicidal activity of compounds of this invention include cotton (Gossypium hirsutum var. Stoneville), soybean (Glycine max var. Williams), field corn (Zea mays var. Agway 595S), rice (Oryza sativa var. Labelle), wheat (Triticum aestivium var. Prodax), field bindweed (Convolvulus arvensis) , morningglory (Ipomea lacuno ~ sa or Ipomea hederacea) , velvetleaf (Abutilon theophrasti) , barnyardgrass (Echinochloa crus galli) , green foxtail (Setaria viridis) , and johnsongrass (Sorghum halepense) . Seeds or tubers of the plant test species were planted in furrows in steam sterilized sandy loam soil contained in disposable fiber flats. A topping soil of equal portions of sand and sandy loam soil was placed uniformly on top of each flat to a depth of approxi¬ mately 0.5 cm. The flats for the preemergence test were watered, then drenched with the appropriate amount o "a solution of the test compound in a 50/50 mixture of acetone and water containing a small amount (up to 0.5% v/v) of sorbitan monolaurate emulsifier/solubilizer. The con- centration of the test compound in solution was varied to give a range of application rates, generally 8.0 kg/ha and submultiples thereof. The flats were placed in a greenhouse and watered regularly at the soil 5 surface for 21 days at which time phytotoxicity data were recorded. The flats for the postemergence test were placed in a greenhouse and watered for 8-10 days, then the foliage of the emerged test plants was sprayed with a solution 0 of the test compound in acetone-water containing up to 0.5% sorbitan monolaurate. After spraying the foliage -» was kept dry for 24 hours, then watered regularly for 21 days, and phytotoxicity data recorded. Phytotoxicity data were taken as percent control. 5 Percent control was determined by a method similar to the 0 to 100 rating system disclosed in "Research Methods In Weed Science," 2nd ed., B. Truelove, Ed.; Southern Weed Science Society; Auburn Unversity, Auburn, Alabama, 1977. The present rating system is as follows: Herbicide Rating System Rating Description Percent of Main Crop Weed Control Categories Description Description No effect No crop reduction No weed control or injury 10 Slight discolora¬ Very poor weed tion or stunting control 20 Slight Some discolora¬ Poor weed effect tion, stunting or control stand loss 30 Crop injury more Poor to defi¬ pronounced but not cient weed lasting control 40 Moderate injury, Deficient weed crop usually control recovers 50 Moderate Crop injury more Deficient to effect lasting, recovery moderate weed control- 60 Lasting crop Moderate weed injury no recovery control 70 Heavy injury and Control some¬ stand loss what less than satisfactory 80 Severe Crop nearly des¬ Satisfactory e fect troyed a few to good weed survivors control 90 Only occasional Very good to live plants left excellent control 100 Complete Complete crop Complete weed effect destruction destruction Herbicidal data at selected application rates are given for various compounds of the invention in Table 3 and 4 below. The test compounds are identified in the tables below by numbers which correspond to those in Table 1. In the tables of herbicidal data below: "kg/ha" is kilograms per hectare, and "% C" is percent control. It is clear that the generic class of aryltria- zolinones and thiones described and illustrated herein is characterized by herbicidal activity, and that the degree of this activity varies among specific compounds within this class and to some extent among the species of plant to which these compounds may be applied. Thus, selection of a specific herbicidal compound for control of a specific plant may readily be made. For herbicidal application, the active compounds as above defined are formulated into herbicidal composi¬ tions, by admixture, in her-bicidally effective amounts, with adjuvants and carriers normally employed in the art for facilitating the dispersion of active ingre¬ dients for the particular utility desired, recognizing the fact that the formulation and mode of application of a toxicant may affect the activity of the material in a given application. Thus, for agricultural use the present herbicidal compounds may be formulated as granules of relatively large particle size, as water- soluble or water-dispersible granules, as powdery dusts, as wettable powders, as emulsifiable concen¬ trates, as solutions, or as any of several other known types of formulations, depending on the desired mode of application. For preemergence application these herbicidal compositions are usually applied either as sprays, dusts, or granules in the areas in which suppression of vegetation is desired. For poste ergence control of established plant growth, sprays or dusts are most commonly used. These formulations may contain as little as 0.5% to as much as 95% or more by weight of active ingredient. Dusts are free flowing admixtures of the active ingredient with finely divided solids such as talc, natural clays, kieselguhr, flours such as walnut shell and cottonseed flours, and other organic and inorganic solids which act as dispersants and carriers for the toxicant; these finely divided solids have an average particle size of less than about 50 microns. A typical dust formulation useful herein is one containing 1.0 part of the herbicidal compound and 99.0 parts of talc. Wettable powders, also useful formulations for both pre- and postemergence herbicides, are in the form of finely divided particles which disperse readily in water or other dispersant. Th.e wettable powder is ultimately applied to the soil either as a dry dust or as an emulsion in water or other liquid. Typical carriers for wettable powders include Fuller's earth, kaolin clays, silicas, and other highly absorbent, readily wet inorganic diluents. Wettable powders normally are prepared to contain about 5-80% of active ingredient, depending on the absorbency of the carrier, and usually also contain a small amount of a wetting, dispersing or emulsifying agent to facilitate disper¬ sion. For example, a useful wettable powder formula¬ tion contains 80.8 parts of the herbicidal compound, 17.9 parts of Palmetto clay, and 1.0 part of sodium lignosulfonate and 0.3 part of sulfonated aliphatic polyester as wetting agents. Frequently, additional wetting agent and/or oil will be added to the tank-mix for postemergence application to facilitate dispersion on the foliage and absorption by the plant. Other useful formulations for herbicidal applica¬ tions are emulsifiable concentrates. Emulsifiable concentrates are homogeneous liquid or paste composi¬ tions dispersible in water or other dispersant, and may consist entirely of the herbicidal compound and a liquid or solid emulsifying agent, or may also contain a liquid carrier, such as xylene, heavy aromatic naphthas, isophorone, or other non-volatile organic solvent. For herbicidal application these concentrates are dispersed in water or other liquid carrier, and normally applied as a spray to the area to be treated. The percentage by weight of the essential active ingre¬ dient may vary according to the manner in which the composition is to be applied, but in general comprises 0.5 to 95% of active ingredient by weight of the herbi¬ cidal composition. Typical wetting, dispersing, or emulsifying agents used in agricultural formulations include, for example, the alkyl and alkylaryl sulfonates and sulfates and. their sodium salts, polyhydric alcohols, and other types of surface active agents, many of which are available in commerce. The surface active agent, when used, normally comprises 1% to 15% by weight of the herbicidal composition. For instance an emulsifiable concentrate may have the following composition (in % by weight): Active ingredient A 40.00 Antimicrobial agent 0.05 Foam suppressant 0.10 Surfactant C 2.60 Surfactant D 0.40 Thickener 0.35 Suspending agent 0.45 Propylene glycol (antifreeze) 6.00 Water 50.05 Total 100.00 The antimicrobial agent is sodium o-phenylphenate tetrahydrate sold under the trademark and designation "Dowacide A". The foam suppressant is a water dilutable silicone emulsion sold under the trade- mark and designation "Dow Corning AF" . Surfactant C is a non-ionic paste of a condensate of ethylene oxide with a hydrophobic base formed by condensing propylene oxide with propylene glycol, sold under the trademark and designation "Pluronic P-84." Surfactant D is an anionic liquid comprising the sodium salt of a complex organic phosphate ester, sold under the trademark and designation "GAFAC L0-529." The thickener is a xanthan gum sold under the trademark and designation "Kelzan-M". The suspending agent is a colloidal magnesium aluminum silicate sold under the trademark and designation "Veegum." In use, by the farmer, this concentrate may be diluted with water to provide an aqueous composition containing, say about 1/4% to 1 1/2% of the active ingredient, for use on the field. Other useful formulations for herbicidal appli¬ cations include simple solutions of the active ingre¬ dient in a solvent in which it is completely soluble at the desired concentration, such as acetone, alkylated naphthalenes, xylene, or other organic solvents. Thus a suitable solution may contain, for instance, some 65% of the active ingredient, together with a minor propor¬ tion (say 1 to 10%) of a surfactant; for use on the field, this solution may be diluted with water, by the farmer, to provide an aqueous composition containing, s y about 1/4% to 1 1/2% of the active ingredient. Granular formulations, wherein the toxicant is carried on relatively coarse particles, are of particular utility for aerial distribution or for penetration of cover crop canopy. Pressurized sprays, typically aerosols wherein the active ingredient is dispersed in finely divided form as a result of vaporization of a low boiling dispersant solvent carrier, such as the Freons, may also be used. Water-soluble or water-dis¬ persible granules are also useful formulations for herbicidal application of the present compounds. Such granular formulations are free-flowing, non-dusty, and readily water-soluble or water-miscible. The soluble or dispersible granular formulations described in U.S. patent No. 3,920,442 are useful herein with the present herbicidal compounds; these may be diluted with water, by the former, to provide an aqueous composition con¬ taining say about 1/4 to 1 1/2% of the active ingre¬ dient, for use on the field. The active herbicidal compounds of this inven- tion may be formulated and/or applied with insecti¬ cides, fungicides, nematicides, plant growth regula¬ tors, fertilizers, or other agricultural chemicals and may be used as effective soil sterilants as well as selective herbicides in agriculture. In applying an active compound of this invention, whether formulated alone or with other agricultural chemicals, an effec¬ tive amount and concentration of the active compound is of course employed; the amount may be as low as 15 g/ha or lower, e.g. about 10 to 500 g/ha such as 50, 100, 200 or 300 g/ha. The active herbicidal compounds of this inven¬ tion may be used in combination with other herbicides, e.g. they may be mixed with, say, an equal or larger amount of a known herbicide such as chloroacetanilide herbicides such as 2-chloro-N-(2,6-diethylphenyl)-N- ( ethoxy ethyl)acetamide (alachlor), 2-chloro-N- (2-ethyl-6-methylphenyl)-N-(2-methoxy-l-methyle ' thyl)- acetamide (metolachlor) , and N-chloroacetyl-N-(2, 6- diethylphenyDglycine (diethatyl-ethyl) ; benzothia- diazinone herbicides such as 3-(l-methylethyl)- (IH)-2,1, 3-benzothiadiazin-4-(3H)-one-2,2-dioxide (bentazon) ; triazine herbicides such as 6-chloro-N- ethyl-N-(1-methyle hyl)-1,3,5-triazine-2,4-diamine (atrazine), and 2- [4-chloro-6-(ethylamino)-l,3,5- triazin-2-yl3amino -2- methylpropanenitrile (cyana- zine); dinitrolaniline herbicides such as 2,6-dinitro- N,N-dipropyl-4-(trifluoromethyl)benzeneamine (tri- fluralin) ; and aryl urea herbicides such as N'-(3,4-di¬ chlorophenyl)-N,N-dimethylurea (diuron) and N,N-di- methyl-N'-[3-(trifluoromethyl)phenyl3urea (fluo- meturon); and other heterocyclic nitrogen herbicides such as 2-(2-(chlorophenyi)methyl)-4, 4-dimethyl-3- isoxazolidinone.. It is apparent that various modifications may be made in the formulation and application of the com¬ pounds of this invention without departing from the inventive concepts herein as defined in the claims. - 41 - (a) Tab le Representattve Compounds Cpd X_ Y_ R_ ϋ' R2 3 1 Cl Cl CH H CHF 2 CH 3 2 F F CH 3 H CHF 2 CH3 3 - F Cl CH 3 H CHF 2 CH 3 4 F Br CH 3 H CHF 2 CH 3 5 F CH 3 CH 3 H CHF 2 CH3 6 CH 3 CH 3 CH 3 H CHF 2 CH 3 9 Cl Cl C 2 H 5 H CHF 2 CH 3 10 F F C 2 H 5 H CHF 2 CH 3 II F Cl C 2 H 5 H CHF 2 CH 12 F Br C 2 H 5 H CH 3 CH 3 13 F Br C 2 H 5 H CHF 2 CH 3 14 CH 3 CH 3 C 2 H 5 H CHF 2 CH 3 15 F Br C 2 H 5 H (CH 2 ) 3 F ' CH 3 16 Cl Cl ^- 3 H 7 H CHF 2 CH 17 F F JT C 3 H 7 H CHF 2 CH 3 18 F Cl JT C 3 H 7 H CHF 2 CH 3 19 F Br n-C 3 H 7 H CHF 2 CH 3 20 F Cl CH 3 C 2 H 5 CHF 2 CH 3 21 ■ F Cl CH 3 n- C3H7 CHF 2 CH 3 22 Cl Cl CH3 S0 2 CH3 CHF 2 CH3 - 42 - Cpd Y_ _R_ i 23 F F CH 3 S0 2 CH : CHF, CH 3 24 F Cl CH 3 S0 2 CH 3 CHF, CH 3 25 F Br CH 3 S0 2 CH 3 CHF, CH 3 26 F CH 3 CH 3 S0 2 CH 3 CHF- CH 3 27 CH 3 CH 3 CH 3 S0 2 CH 3 CHF- CH 3 28 F Cl CH 3 S0 2 C2H 5 CHF-, CH 3 29 F Cl C2 H 5 CH, CHF- CH 3 30 F Cl C2H5 C 2 H 5 CHF, CH 3 31 F Cl C_H 5 ϋ "C 3 H 7 CHF- CH 3 32 F Cl C 2 H 5 1 "C 3 H 7 CHF, CH 3 35 Cl Cl °2 H 5 S0 2 C2H 5 CHF, CH, 36 Cl Cl C 2 H 5 S0 2 C2H 5 S0 2 C2H 5 CH 3 38 F Cl C2 H 5 S0 2 C2H 5 CHF, CH, 39 F Br °2 H 5 SO2C2H5 CH, CH, 40 F Br (^Hg S0 2 C2H 5 CHF, CH, 41 CH 3 CH 3 C 2 H 5 SO C^He CHF, CH, 42 F Br C 2 H 5 SOoC He (CH 2 ) 3 F CH, 43 Cl Cl S0 2 C 3 H 7 (ji) CHF- CH, 44 F F JT_-C 3 H 7 50 2 C 3 H 7 (n_) CHF, CH, 45 F Cl rr-C 3 H 7 S0 2 C 3 H 7 < iL ) CHF, CH, 46 F Br JT C 3 H 7 S0 2 C 3 H 7 (n_) CHF, CH, 47 F Cl CH 3 CH, CHF, CH, 48 F Cl CF, CHF, CH, - 43 - Cpd Y_ _R_ ϋ R3 49 F Cl CH 3 C4H9 CHF 2 CH3 50 Cl Cl CH 3 C 2 H 5 CHF 2 CH 3 51 Cl Cl CH 3 C 3 H 7 CHF 2 CH3 52 Cl Cl CH 3 C4H9 CHF 2 CH3 53 F Cl C 6 H 5 H CHF 2 CH3 54 F Cl N(CH 3 >2 H CHF 2 CH3 55 F Cl N(C 2 H 5 ) 2 H CHF 2 CH3 56 F Cl OH H CHF 2 CH3 57 F Cl CH 3 CHF 2 CHF 2 CH 3 58 Cl F CH 3 SO2CH3 CHF 2 CH 3 59 Cl F C 2 H 5 S0 2 C 2 H 5 CHF 2 CH3 60 Cl , F CH 3 H CHF 2 CH 3 61 Cl F C 2 H 5 H CHF 2 CH 3 62 CH 3 Cl CH 3 SO2CH3 CHF 2 CH3 63 CH 3 Cl CH 3 H CHF 2 CH3 64 F N0 2 CH 3 S0 2 CH 3 CHF 2 CH3 65 F N0 2 CH 3 H CHF 2 CH 3 66 F CCHF 2 CH 3 S0 2 CH 3 CHF 2 CH 3 67 F CCHF 2 CH 3 H CHF 2 CH 3 68 F CF 3 CH 3 SC CH3 CHF 2 CH 3 69 F CF 3 CH H CHF CH 3 70 F Cl -(CH 2 ) 3 - CHF 2 CH 3 71 F Cl - ( CH 2 ) 4- CHF 2 CH 3 72 F Cl -(CH 2 ) 5 - CHF 2 CH 3 73 F Cl - ( CH ) 6- CHF 2 CH3 74 F Cl CH C00H H CHF2 CH3 - 44 - Cpd X_ Y_ R_ Rj R2 ϋ 3 75 F Cl CH 3 OCH 3 CHF 2 CH 3 76 F Cl CH 3 CH oCH oCH or CHF 2 CH 3 77 F Cl CH 3 H CHF 2 0CH 3 78 F Cl CH 3 S0 2 CH 3 CHF 2 0CH 3 79 F Cl CH 3 S0 2 CH 3 CHF 2 Cl 80 F Cl CH 3 H CHF 2 Cl 81 F Cl CH 3 H CHF 2 H 82 F Cl CH 3 H CHF 2 S0 2 CH 3 83 F Cl CH 3 H CHF 2 SOCHj 84 F Cl CH 3 H CHF 2 SCH 3 85 F • Cl -< >- c. H CHF 2 CH 3 86 F Cl - θ)- CH 3 H CHF 2 CH 3 87 F Cl — (o OCH CHF 2 3 H CH 3 88 Br Cl CH 3 H CHF 2 CH 3 89 Br Br CH 3 H CHF 2 CH 3 90 Br ff 3 CH 3 H CHF 2 CH 3 91 F Cl CH 3 CHgCOOH CHF 2 CH 3 92 F Cl C 2 H 5 CH_C00H CHF 2 CH 3 Other representative ccmpounds are those whtch are Identical with ccmpounds 20, 21, 29-33 and 47-87, 91 and 92 respectively, except that X Is F and Y Is Br. Still other representative ccmpounds are those which are Identical with Compounds I to 87, 91 and 92 respectively, except that X Is F and Y Is CF 3 . Other representative compounds are those that are Identical to compounds 9 to 87, 91 and 92 respectively, except that X Is Br. Other representative compounds are those which are Identical with Compounds 1-19, 48, 53-56, 60, 61, 63, 65, 67, 69, 71, 74, 77, 80-92, respectivel , except that R 1 Is Na (or other salt-forming group). Compounds In which R 1 Is H, such as compound I, used preemergently have shown a selectivity favorable to soybeans. Compounds In which R* Is alkyl, such as compound 31, used preemergently, have shown a selectivity favorable to cotton. Compound I pre-emergently applied also shows good corn tolerance. These are effective at low rates of application. 09l23009I md -45" Table 2 Characterizing Data C m pd El em ental A nalys ;1s No. M.P. CO E m plrlcal Form ula C H — _ 75-78(d)* C ι ι H , 0 CI 2 F 2 N 4 0 3 S c 34, .21 2.59 1 , .51 F 33, .98 2.62 14, .20 160-161 0 F 4 N 4 0 3 S C 37.29 2.85 15. ,81 F 37, ,33 2.75 16. ,00 3 156-159 0 CIF 3 N4θ S C 4; .79 2.65 1 . ,75 F 35. .47 2.53 14. ,94 4 162-163 iBrF 4 03S C 31, ,82 2.43 13. ,49 F 31. ,93 2.31 13.28 5 136-138 3 F 3 N 4 0 3 S C 41, ,14 3.74 15. 99 F 41. ,20 3.88 15. 74 6 140-141 3H 6 F 2 N 4 0 3 S 9 126-128 2 H 2 CI 2 F 2 N 4 0 3 S C 35.92 3.02 13.96 F 35.83 3.00 13.95 10 I 18-119 ^H 2 F 4 N 4 0 3 S C 39.13 3. " 28 15.21 F 38.92 3.44 15.20 11 162-163 2CIF3N4O3S C 37.46 3.14 14.56 F 37.65 3.12 14.44 12 218.5-220 4 BrFN 0 3 S C 36.65 3.59 14.25 F 36.94 3.48 14,17 13 140-141 2 H 2 8rF 3 N 0 3 S 14 123-124 4 H 8 F 2 N 4 0 3 S 15 152-153 _H BrF 2 N 4 0 S C 38.28 3.90 12.75 F 38.33 3.92 12.60 16 159-162 4 CI 2 F 2 N4θ 3 S C 37.60 3.40 13.49 F 37.60 3.15 13.53 17 107-108 4 F 4 N 4 0 3 S C 40.84 3.70 14.65 F 40.54 3.47 14.51 95-96 3H CIF 3 N 4 0 3 S C 39.18 3.54 14.05 F 38.07 3.60 14.05 -46- C m pd Elem ental A nalysls No. M.P. CO E plrlcal Form ula C H N 19 114-115 4 BrF 3 N 4 0 3 S 20 112-116 CIF 3 N 4 0 3 S 21 108-1 I I 6 C1F 3 N 4 0 3 S 22 213-214 2 CI 2 F 2 N 4 0 5 S 2 C 30.91 2.59 12.02 F 31.15 2.43 12.03 23 175-180 2 F 4 N 4 0 5 S 2 C 33.33 2.80 12.96 F 33.25 2.85 12.93 24 180-196 2 CIF 3 N 4 0 5 S 2 C 32.11 2.69 12.98 F 31.98 2.32 12.15 25 192-194 2 F 3 N 4 0 5 S 2 C 29.22 2.45 11.36 F 29.19 2.42 11.32 26 172-176 5 F 3 N 4 0 5 S 2 27 208-209 8 F 2 N 4 0 5 S 2 28 128-131 4 CIF 3 N 4 0 5 S 2 C 33.73 3.05 12.11 F 33.57 3.17 12.12 29 101-104 C1F N 4 0 3 S C 39.15 3?5 14.05 F 39.46 3.57 13.91 30 4-1 6 CIF 3 N 4 0 3 S C 40.73 3.91 13.57 F 41.05 3.74 13.46 31 35-137 8 C1F 3 N 4 0 S C 42.21 4.25 13.13 F 42.02 4.28 12.95 32 25-126 8 C1F 3 N 4 0 3 S C 42.21 4.25 12.12 F 43.05 4.30 12.81 33 126-128 6 CIF 3 N 4 0 4 S C 39.21 3.76 13.07 F 39.98 3.77 12.87 35 159-160 6 CI 2 F 2 N 4 0 5 S 2 36 215-216 θCl 2 N 4 0 7 S 3 C 33.64 3.77 10.46 F 33.88 3.91 10.68 37 145-147 6 F 4 N 4 0 5 S 2 C 36.52 • 3.50 12.17 F 36.48 3.53 12.04 -47- C m pd Elemental Analysis No. M.P. CO E plrlcal Form ula C H N 38 143-1 4 4 H , 6 CIF 3 N 4 0 5 S 2 39 173-174.5 4 H | 8 BrFN 4 0 5 S 2 c 34,64 3.74 I 1.54 F 33.72 3.57 10.64 40 145-146 4 H |6 SrF 3 N 4°5 s 2 C 32.25 3.09 10.75 F 31.94 3.10 10.78 41 169-172 6 H 22f r 2 N 4°5S 2 42 151-153 6 H 2| BrF 2 N 4 0 5 S 2 C 36.16 3.98 10.54 F 35.68 3.68 10.12 43 168-169 6 H 20 CI 2 F 2 N 4 0 5 S 2 C 36.86 3.87 10.75 F 37.01 3.90 10.94 44 64-67 6 H 20 F 4 N 4 0 5 S 2 C 39.34 4.1 11.47 F 39.27 4.05 11.27 45 119-121 6 H 20 CIF 3 N4θ 5 S 2 C 38.06 3.99 11.10 F 38.11 3.97 10.89 46 128-129 6 H 20 BrF 3 N 4 0 5 S 2 C 34.98 3.67 10.20 F 35.00 3.61 10.12 47 oil 2 H i 2 CIF 3 N 4 0 3 S 48 172-173 I H 7 CIF 6 N 4 0 3 S C 31.12 1.66 13.19 F 30.86 1.61 12.99 49 oil 5 H 18 CIF 3 N 4 0 3 S 50 125-126 3 H l4CI 2 F 2 N 4 0 3 S c 37.60 3.40 13.49 F 37.78 3.34 13.23 51 oil 4 H , 6 CI 2 F 2 N4θ 3 S C 39.17 3.76 13.05 F 39.26 3.70 12.80 52 o l 5 H, 8 CI 2 F 2 N 4 0 3 S C 40.64 4.09 12.64 F 40.38 4.32 12.34 0913 W 30091 m d - - Table 3 Preemergence Herbicidal Activity (% Control) Compound No. 1 2 3 4 5 6 Rate (kg/ha) 0.5 1.0 0.25 0.25 0.5 1.0 Species Cotton 95 100 100 100 95 40 Soybean 50 60 50 50 80 60 Field Corn 100 10 95 100 100 70 Rice 95 10 90 100 100 50 Wheat 50 20 90 90 95 30 Field Bindweed 100 50 100 100 95 100 Morningglory 95 90 90 95 100 70 Velvetleaf 100 100 100 100 100 100 Barnyardgrass 95 80 95 100 100 95 Green Foxtail 100 90 90 100 100 100 Johnsongrass 95 70 90 95 100 90 Compound No. 9 10 11 12 13 14 15 Rate (kg/ha) 0.5 1.0 0.25 0.25 0.25 1.0 0.5 Species Cotton 100 90 100 50 95 40 90 Soybean 20 30 40 10 30 40 10 Field Corn 95 20 95 10 80 80 90 Rice 80 10 95 60 90 30 80 Wheat 20 10 30 0 40 30 20 Field Bindweed 100 80 100 60 100 90 90 Morningglory 95 90 100 70 100 70 100 Velvetleaf 100 100 100 80 100 90 100 Barnyardgrass 80 70 100 10 100 90 100 Green Foxtail 70 100 100 30 100 90 95 Johnsongrass 80 70 90 50 90 90 90 - 49 - Table 3 (Continued) Compound No. 16 17 18 19 20 21 Rate (kg/ha) 2.0 1.0 0.25 0.25 0.25 0.25 Species Cotton 90 90 70 80 95 95 Soybean 10 30 10 30 95 100 Field Corn 90 40 95 95 100 100 Rice 80 70 70 80 100 100 Wheat 20 20 20 10 95 100 Field Bindweed 100 60 100 100 100 100 Morningglory 100 80 70 70 100 100 Velvetleaf 100 100 100 100 100 100 Barnyardgrass 95 70 80 95 100 100 Green Foxtail 95 30 70 95 100 100 Johnsongrass 70 50 70 70 100 100 Compound No. 22 23 24 25 26 27 Rate (kg/ha) 0.5 0.25 0.25 0.25 0.5 1.0 Species Cotton 95 95 100 95 95 40 Soybean 70 30 90 100 100 80 Field Corn 90 20 100 95 100 100 Rice 90 10 100 95 95 20 Wheat 80 20 95 95 100 40 Field Bindweed 100 30 95 80 100 80 Morningglory 100 70 100 100 95 60 Velvetleaf 100 100 100 100 100 90 Barnyardgrass 100 70 100 100 100 * 80 Green Foxtail 100 40 100 100 100 100 Johnsongrass 100 60 100 100 100 90 - Table 3 (Continued) Compound No. 28 29 30 31 32 33 35 Rate (kg/ha) 0.25 0.25 0.25 0.25 0.5 0.25 1.0 Species Cotton 100 90 100 90 100 100 100 Soybean 90 90 100 100 95 100 80 Field Corn 100 100 100 100 100 100 100 Rice 100 95 95 100 100 100 80 Wheat 95 80 90 100 100 100 95 Field Bindweed 100 100 100 100 100 100 100 Morningglory 100 100 100 100 100 100 100 Velvetleaf 100 100 100 100 100 100 100 Barnyardgrass 100 100 100 100 100 100 100 Green Foxtail ιoσ 100 100 100 100 100 100 Johnsongrass 100 100 100 100 100 100 100 Compound No. 36 37 38 39 40 41 42 Rate (kg/ha) 4.0 0.25 • 1.0 0.25 1.0 1.0 0.25 Species Cotton 0 80 100 40 100 30 - 80 Soybean 0 40 100 20 90 40 80 Field Corn 0 90 100 50 95 100 100 Rice 10 50 100 20 95 40 80 Wheat 0 80 100 10 100 40 30 Field Bindweed 0 70 100 40 100 90 70 Morningglory 0 90 100 60 100 80 100 Velvetleaf 0 100 100 95 100 90 100 Barnyardgrass 10 95 100 30 100 100 95 Green Foxtail 20 100 100 30 100 100 90 Johnsongrass 20 95 100 90 100 95 95 - 51 - Table 3 (Continued) Compound No. 43 44 45 46 47 48 49 Rate (kg/ha) 0.5 0.25 0.25 0.25 0.25 2.0 0.25 Species Cotton 10 0 30 30 95 100 80 Soybean 10 0 30 80 95 20 100 Field Corn 70 95 100 100 95 60 100 Rice 20 60 80 50 95 80 95 Wheat 10 ' 70 70 70 95 30 100 Field Bindweed 30 60 50 90 100 100 100 Morningglory 50 60 80 95 100 100 100 Velvetleaf 20 100 100 100 100 100 100 Barnyardgrass 80 90 100 90 100 100 100 Green Foxtail 90 90 95 100 100 100 100 Johnsongrass 70 90 95 100 100 100 100 Table 4 Poste ergeice Herbicidal Ac ivi .ty (% Control) Compound No. 1 2 3 4 5 6 Rate (kg/ha) 0.5 1.0 0.25 0.25 0.5 1.0 Species Cotton 100 100 100 100 100 80 Soybean 60 80 60 80 80 60 Field Corn 40 30 70 80 70 50 Rice 95 20 90 95 80 50 Wheat 80 40 50 70 80 40 Field Bindweed 100 60 80 95 100 50 Morningglory 100 95 100 95 95 95 Velvetleaf 100 100 100 100 100 50 Barnyardgrass 100 50 100 95 100 50 Green Foxtail 95 70 100 80 100 80 Johnsongrass 100 40 70 70 90 50 - 2 - Table 4 (Continued) Compound No. 9 10 11 12 13 14 15 Rate (kg/ha) 0.5 1.0 0.25 0.25 0.25 1.0 0.5 Species Cotton 100 100 100 30 90 70 100 Soybean 40 70 80 40 70 50 70 Field Corn 40 30 60 20 90 30 70 Rice 90 20 90 40 80 20 50 Wheat 80 40 50 10 30 30 100 Field Bindweed 100 40 100 10 100 70 80 Morningglory 100 90 95 30 100 90 90 Velvetleaf 100 100 100 10 100 50 100 Barnyardgrass 95 50 80 40 95 50 80 Green Foxtail 100 40 80 40 95 90 40 Johnsongrass 95 30 70 30 60 80 90 Compound No. 16 17 18 19 20 21 Rate (kg/ha) 2.0 1.0 0.25 0.25 0.25 0.25 Species Cotton 100 60 60 100 100 100 Soybean 40 40 50 70 95 100 Field Corn 100 20 40 80 100 100 Rice 80 30 80 70 100 100 Wheat 40 30 30 30 80 100 Field Bindweed 100 50 80 90 100 100 Morningglory 100 80 70 90 100 100 Velvetleaf 100 70 100 100 100 100 Barnyardgrass 100 40 70 90 100 100 Green Foxtail 95 40 95 70 - - Johnsongrass 80 30 30 60 90 100 - 53 - Table 4 (Continued) Compound No. 22 23 24 25 26 27 Rate (kg/ha) 0.5 0.25 0.25 0.25 0.5 1.0 Species Cotton 100 40 100 100 100 40 Soybean 50 40 90 95 95 60 Field Corn 70 20 90 95 80 70 Rice 90 0 80 95 50 20 Wheat 40 20 70 95 80 50 Field Bindweed 100 20 95 100 95 30 Morningglory 100 20 95 100 100 70 Velvetleaf 100 30 100 100 100 20 Barnyardgrass 100 20 90 100 100 70 Green Foxtail 100 20 95 100 100 100 Johnsongrass 100 20 95 100 100 70 Compound No. 28 29 30 31 32 33 Rate (kg/ha) 0.25 0.25 0.25 0.25 0.5 0.25 Species Cotton 100 95 100 95 100 100 Soybean 95 95 100 100 100 100 Field Corn 80 80 90 100 100 100 Rice 40 40 90 95 100 100 Wheat 70 70 90 100 100 100 Field Bindweed 90 30 95 100 100 90 Morningglory 95 90 100 100 100 100 Velvetleaf 100 70 100 100 100 100 Barnyardgrass 95 70 95 100 100 100 Green Foxtail 95 95 95 100 100 100 Johnsongrass 80 80 80 90 100 100 - - Table 4 (Continued) Compound No. 35 36 37 38 39 40 Rate (kg/ha) 1.0 4.0 0.25 1.0 0.25 1.0 Species Cotton 80 20 40 100 40 100 Soybean 60 10 40 100 40 90 Field Corn 100 o • 70 100 10 100 Rice 80 10 30 100 20 100 Wheat 60 0 30 100 20 100 Field Bindweed 90 20 30 100 30 100 Morningglory 100 0 80 100 90 100 Velvetleaf 90 Q 100 100 60 100 Barnyardgrass 100 20 60 100 20 100 Green Foxtail 100 30 50 100 70 100 Johnsongrass 90 20 50 100 30 100 Compound No. 41 42 43 44 45 46 Rate (kg/ha) 1.0 0.25 1.0 1.0 1.0 0.25 Species Cotton 40 95 • 95 40 90 100 Soybean 60 90 40 40 80 80 Field Corn 80 80 60 40 100 95 Rice 40 30 20 20 80 20 Wheat 50 40 10 40 80 60 Field Bindweed 30 40 0 50 95 100 Morningglory 50 60 90 50 95 100 Velvetleaf 30 100 40 40 100 100 Barnyardgrass 95 70 60 40 100 100 Green Foxtail 80 50 90 60 95 100 Johnsongrass 95 80 30 40 95 90 - 5 - Table 4 (Continued) Compound No. 47 48 49 Rate (kg/ha) 0.25 2.0 0.25 Species Cotton 100 100 90 Soybean 95 95 100 Field Corn 80 100 100 Rice 80 50 95 Wheat 90 50 100 Field Bindweed 100 100 100 Morningglory 100 100 100 Velvetleaf 100 100 100 Barnyardgrass 95 95 100 Green Foxtail 95 95 100 Johnsongrass 95 80 100

Claims: - 5 6 - CLAIMS i 1. An herbicidal compound characterized by the general formula in which X is Br, Cl, F or haloalkyl; Y is Br, Cl, F, methyl, haloalkyl, nitro, or a radical of the formula R 8 OCH»-, R 8 SCH-,-, R 8 SOCH-,- or 8 8 R SO- j CH-,- where R is C_-C 3 alkyl, C-,-C_alkenyl, C--C-alkynyl, phenyl, or substituted phenyl; R 3 is halogen, alkyl, haloalkyl, cyanoalkyl, arylalkyl, alkoxyalkyl, alkylthio, alkylsulfinyl,- alkylsulfonyl, alkylthioalkyl, alkylsulfinylalkyl or alkylsulfonylalkyl; R 2 i.s alkyl, alkoxy, haloalkyl, alkenyl, alkynyl, cyanoalkyl, thiocyanoalkyl, or a group of the formula -alkylene-Y 1 -R in which said alkylene group has 1 to 5 carbon atoms, Y' is oxygen or S(0)r in which r is 0 to 2, and R is alkyl, alkenyl or alkynyl; R is alkyl, haloalkyl or aryl; R is hydrogen, a salt-forming group, alkyl, benzyl, haloalkyl, alkoxy, S0 2 R, alkynyl, alkenyl, <- group of the formula -alkylene-SO^R, alkoxymethyl, cyanomethyl, carboxymethyl, or alkoxycarbonyl, or R and R., together is alkylene. 2. A compound as in claim 1 characteried in that X and Y are each halogen, R 2 i.s CHF-,, R3 is 1 Δ CH-,, R is lower alkyl and R is hydrogen, a salt- forming group, lower alkyl or -S0 2 R. - 57 - 3. A compound as in claim 2 characterized in that X is Cl or Br, Y is Cl or Br, R is lower alkyl and R is H or a salt-forming group. 4. A compound as in claim 2 characterized in that R is lower alkyl and R is -SO-,R. 5. A compound as in claim 2 characterized in that R is lower alkyl and R is lower alkyl. 6. An herbicidal composition characterized by an herbicidally effective amount of the compound of claim 1 in admixture with a suitable carrier. 7. A method for controlling undesired plant growth which is characterized by applying to the locus where control is desired an herbicidally effective amount of the composition of claim 6. 8. An herbicidal composition characterized by an herbicidally effective amount of the compound of claim 2 in admixture with a suitable carrier. 9. A method for controlling undesired plant growth which is characterized by applying to the. locus where control is desired an herbicidally effective amount of the composition of claim 8. 10. An herbicidal composition characterized by an herbicidally effective amount of the compound of claim 3 in admixture with a suitable carrier. ... 11. A method for controlling undesired plant growth which is characterized by applying to the locus where control is desired an herbicidally effective amount of the composition of claim 10. 12. An herbicidal composition characterized by an herbicidally effective amount of the compound of claim 4 in admixture with a suitable carrier. 13. A method for controlling undesired plant growth which is characterized by applying to the locus where control is desired an herbicidally effective amount of the composition of claim 12. - 58 - 14. An herbicidal composition characterized by an herbicidally effective amount of the compound of claim 5 in admixture with a suitable carrier. 15. A method for controlling undesired plant growth which is characterized by applying to the locus where control is desired an herbicidally effective amount of the composition of claim 14. 16. A compound as in claim 3 in which R is methyl or ethyl. 17. A compound as in claim 3 in which R is methyl. 18. A method as in claim 11 including the steps of planting said locus with soybeans and applying said composition pre-emergently to said locus. 19. A method as in claim 15 including the steps of planting said locus with cotton and applying said composition preemergently to said locus. 20. Process which comprises treating a compound of the formula to convert it to a compound of the formula - 53 - 2 in which X and Y are each Br, Cl or F; R is halo 3 lower alkyl; R is lower alkyl, R is lower alkyl or halo lower alkyl; R is hydrogen or a salt-forming group or lower alkyl; X is hydrogen or the same as X; Y is hydrogen or nitro or amino or the same as Y; Z is N(R )SO-,R or hydrogen or nitro or amino and R 2a is hydrogen or the same as * R2, said process comprising a sequence of steps which includes the following in any order: halogenating to introduce the X and Y groups when either X or Y is not halogen, alkylsulfonating to introduce the N(R )S0 R group when Z 1 is not N(R1)SO,R, and haloalkylating to introduce the R 2 group when R 2a is not R 2 .

Inventors: THEODORIDIS GEORGE, THEODORIDIS, GEORGE
Applicants: FMC CORP, FMC CORPORATION
Application year: 1986
Main classification: A01N43
IPC codes: A01N43, C07D249, C07D417