US3867547A - Insecticidal phenols - Google Patents
Insecticidal phenols Download PDFInfo
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- US3867547A US3867547A US403300A US40330073A US3867547A US 3867547 A US3867547 A US 3867547A US 403300 A US403300 A US 403300A US 40330073 A US40330073 A US 40330073A US 3867547 A US3867547 A US 3867547A
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- butyl
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- 150000002989 phenols Chemical class 0.000 title abstract description 7
- 230000000749 insecticidal effect Effects 0.000 title description 4
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 13
- 241000256113 Culicidae Species 0.000 claims abstract description 10
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 10
- 239000000460 chlorine Substances 0.000 claims abstract description 10
- 150000001875 compounds Chemical class 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 11
- DMXKMZDNNURFOO-UHFFFAOYSA-N 2,6-ditert-butyl-4-(1,2,2-trichloroethenylsulfanyl)phenol Chemical compound CC(C)(C)C1=CC(SC(Cl)=C(Cl)Cl)=CC(C(C)(C)C)=C1O DMXKMZDNNURFOO-UHFFFAOYSA-N 0.000 claims description 5
- 125000001309 chloro group Chemical group Cl* 0.000 claims description 5
- 230000029052 metamorphosis Effects 0.000 claims description 2
- 230000002401 inhibitory effect Effects 0.000 claims 1
- 230000003054 hormonal effect Effects 0.000 abstract description 7
- 230000001002 morphogenetic effect Effects 0.000 abstract description 7
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 abstract description 5
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052794 bromium Inorganic materials 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 125000004432 carbon atom Chemical group C* 0.000 abstract description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052731 fluorine Inorganic materials 0.000 abstract description 3
- 239000011737 fluorine Substances 0.000 abstract description 3
- 229910052736 halogen Inorganic materials 0.000 abstract description 3
- 150000002367 halogens Chemical group 0.000 abstract description 3
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 3
- 239000001257 hydrogen Substances 0.000 abstract description 3
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 abstract description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 abstract 1
- -1 2,6-di-t-butyl-4-phenylthiophenol Chemical compound 0.000 description 28
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 18
- 241000238631 Hexapoda Species 0.000 description 13
- 239000003921 oil Substances 0.000 description 11
- 238000009472 formulation Methods 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 6
- 150000001721 carbon Chemical group 0.000 description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 6
- 241000255925 Diptera Species 0.000 description 5
- 239000002917 insecticide Substances 0.000 description 5
- 239000003208 petroleum Substances 0.000 description 5
- 241000256118 Aedes aegypti Species 0.000 description 4
- 239000004215 Carbon black (E152) Substances 0.000 description 4
- 125000003118 aryl group Chemical group 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 241000382353 Pupa Species 0.000 description 3
- 239000004480 active ingredient Substances 0.000 description 3
- 239000000969 carrier Substances 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 241000238876 Acari Species 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000000921 elemental analysis Methods 0.000 description 2
- 150000002431 hydrogen Chemical group 0.000 description 2
- 230000000974 larvacidal effect Effects 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- ORMAZADQTUNMHC-UHFFFAOYSA-N 1,2,2-trichloroethenyl thiohypochlorite Chemical compound ClSC(Cl)=C(Cl)Cl ORMAZADQTUNMHC-UHFFFAOYSA-N 0.000 description 1
- FALRKNHUBBKYCC-UHFFFAOYSA-N 2-(chloromethyl)pyridine-3-carbonitrile Chemical compound ClCC1=NC=CC=C1C#N FALRKNHUBBKYCC-UHFFFAOYSA-N 0.000 description 1
- CYEJMVLDXAUOPN-UHFFFAOYSA-N 2-dodecylphenol Chemical class CCCCCCCCCCCCC1=CC=CC=C1O CYEJMVLDXAUOPN-UHFFFAOYSA-N 0.000 description 1
- 241000256111 Aedes <genus> Species 0.000 description 1
- 241000239290 Araneae Species 0.000 description 1
- 241000238421 Arthropoda Species 0.000 description 1
- 241000258920 Chilopoda Species 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229940126062 Compound A Drugs 0.000 description 1
- 241000256057 Culex quinquefasciatus Species 0.000 description 1
- 241001408791 Culiseta inornata Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- NLDMNSXOCDLTTB-UHFFFAOYSA-N Heterophylliin A Natural products O1C2COC(=O)C3=CC(O)=C(O)C(O)=C3C3=C(O)C(O)=C(O)C=C3C(=O)OC2C(OC(=O)C=2C=C(O)C(O)=C(O)C=2)C(O)C1OC(=O)C1=CC(O)=C(O)C(O)=C1 NLDMNSXOCDLTTB-UHFFFAOYSA-N 0.000 description 1
- 241000219823 Medicago Species 0.000 description 1
- 235000017587 Medicago sativa ssp. sativa Nutrition 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 239000003849 aromatic solvent Substances 0.000 description 1
- 239000005667 attractant Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003559 chemosterilizing effect Effects 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000012043 crude product Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000002267 larvicidal agent Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 231100001184 nonphytotoxic Toxicity 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 230000003389 potentiating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000003206 sterilizing agent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229940014800 succinic anhydride Drugs 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C323/00—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups
Definitions
- the present invention is concerned with insecticidal compounds which have morphogenetic hormonal mimetic activity.
- Compounds having morphogenetic hormonal mimetic activity exert a disrupting influence upon the normal development of insects. These compounds interfere with the normal metamorphosis of the pest insects and result in the formation of individual insects of the treated species which develop abnormally and are nonviable or sterile. This ultimately leads, indirectly at least, to the destruction of the insect population.
- Japanese Pat. No. 16,970, issued May 11, 1971 discloses the use of 2,6-di-t-butyl-4-phenylthiophenol as an insecticide.
- U.K. Pat. No. 1,311,577 discloses the use of 2,6-di-t-butyl-4-alkylthiophenols for the control of mosquitos.
- U.I(. Pat. No. 1,313,597 discloses a process for preparing 4-arylthio-2,6- dialkylphenols.
- R and R are branched alkyl groups of 3 to 6 carbon atoms attached to the aromatic ring through a secondary or tertiary carbon atom and X is individually hydrogen, fluorine, chlorine, bromine, or iodine, with the proviso that at least one X is a halogen.
- X is chlorine or bromine.
- Representative branched alkyl groups which R and R may represent include s-propyl, s-butyl, t-butyl, tamyl, s-hexyl, etc.
- R and R may be the same or different branched alkyl groups.
- Preferred R and R groups are attached to the aromatic ring through a secondary carbon atom (i.e., a carbon atom substituted with two alkyl groups) or a tertiary carbon atom (i.e., a carbon atom substituted with three alkyl groups).
- Representative phenols of formula I include: 2,6-di-t-butyl-4-( l-chlorovinylthio) phenol. 2,6-di-t-butyl-4-(2-chlorovinylthio) phenol. 2,6-di-t-butyl-4-(2,2-dichlorovinylthio) phenol. 2,6-di-t-butyl-4-( 1,2-dichlorovinylthio) phenol. 2,6-di-t-amyl-4-(trichlorovinylthio) phenol, 2,6-di-sec-butyl-4-(trichlorovinylthio) phenol.
- 2,6-di-t-butyl-4-(trifluorovinylthio) phenol 2,6-di-t-butyl-4-(trifluorovinylthio) phenol. 2,6-di-t-butyl-4-( l-bromo-2.Z-difluorovinylthio) phenol, and 2,6-di-t-butyl-4-( l-fluoro-2,Z-dibromovinylthio) phenol.
- the phenols of formula I are prepared by the reaction of a 2,6-di(branched alkyl) phenol and a halovinylsulfenyl chloride as depicted in the following equation cx-cx s -m (II) (III) no s-cx-cx acl wherein R, R and X have the same significance as 6&
- the reaction depicted in equation 1 is conducted by more or less conventional procedures.
- the molar ratio of the phenol (II) to the sulfenyl halide (III) is substantially equimolar.
- the reaction is conducted in a solvent such as acetic acid. Reaction temperatures suitably vary from 0 to C.
- the product is isolated by conventional methods such as extraction, distillation, crystallization, etc.
- the compounds of the invention are useful as morphogenetic hormonal mimetic insecticides, particularly against mosquitos such as Aedes aegypti, Culex pipiens quinque fasciatus and Culiseta inornata.
- compositions containing 100 to 0.01 ppm, preferably from 5 to 0.1 ppm, are effective for the control of insects.
- the effective concentration depends in part on the mode of application and the particular insect.
- the compounds may be applied in either liquid or solid formulations to the pre-adult insects or their environment. For example, they may be sprayed or otherwise applied directly to plants or aqueous bodies so as to effect control of insects coming into contact therewith.
- Formulations of the compounds of this invention will comprise a toxic amount of one or more of the compounds and a biologically inert carrier. Usually they will also contain a wetting agent. Solid carriers such as clay, talc, sawdust, alfalfa meal. and the like may be used in such formulations. Liquid diluents which may be used with these compounds include water and aromatic solvents. In addition, these formulations may contain other compatible pesticides, fillers, stabilizers, attractants and the like.
- the concentration of the active ingredient to be used with inert carriers will be dependent upon many factors, such as the particular compound which is used, the carrier in or upon which it is incorporated, the method and conditions of application, the insect species to be controlled, etc., the proper consideration of these factors being within the skill of those versed in the art.
- the toxic ingredients of this invention will be effective in concentrations from about 0.0001 percent by weight to as high as 50 percent by weight or higher. Economically, of
- the compounds of the invention are particularly useful in combination with mosquito larvicidal petroleum oil dispersions.
- Petroleum oils suitable as mosquito larvicidal dispersions are known.
- Such hydrocarbon oils include mineral oils such as naphthenic base and paraffinic base lubricating oils, etc., as well as synthetic oils.
- Such hydrocarbon oils are nonphytotoxic and generally contain not more than a few percent aromatics.
- Particularly suitable hydrocarbon oils have boiling points above 350 to 400F. and viscosities of from about 33 to 200 SSU at 100F.
- the amount of the compound of the invention employed in petroleum oil generally ranges from 0.1 to percent by weight based on weight of oil.
- the hydrocarbon oil dispersions containing the compounds of the invention are contacted with or applied to the surface of the aqueous bodies wherein mosquito control is desired by conventional methods.
- insecticide and insect as used herein refer to their broad and commonly understood usage rather than to those creatures which in the strict biological sense are classified as insects.
- insect is used not only to include small invertebrate animals belonging to the class lnsccta but also to other related classes of arthropods whose members are segmented invertebrates having more or fewer than six legs, such as spiders, mites, ticks. centipedes. worms and the like.
- EXAMPLE 3 2,6-Di-t-butyl-4-(trichlorovinylthio) phenol (Compound A) was tested as a morphogenetic hormonal mimetic insecticide against Yellow Fever mosquito larvae (Aedes aegypli) by the following procedure: Late fourth-stage larvae of the mosquito are placed in a cup containing 200 ml. of deionized water containing a known amount of the phenol compound dissolved therein. About 20 larvae are used per test. The larvae are fed and allowed to pupate. The live pupae are kept until the adult emerges. A count is made at each step for mortality, i.e., larvae, pupae and adult mortality.
- the oil formulation was tested for the control of Acdcs uegypli larvae by applying a thin film of the oil formulation to a container containing larvae and I70 ml. ofwater. The larvae are fed and allowed to pupatc. After 2 days. a count is made of larva and pupa mortality. At a dosage corresponding to 0.33 gallon- /acre, the larva mortality was zero and the pupa mortality was 95 percent.
- EXAMPLE 5 2.6-Di-sec.-butyl-4-(trichlorovinylthio) phenol was tested as a morphogenetic hormonal mimetic insecticide against Yellow Fever mosquito larvae by a procedure identical to that of Example 3. At a concentration of 1.7 ppm. the percent pupa mortality was 5 percent.
- a method for killing mosquitos which comprises contacting pre-adult mosquitos with a metamorphosisinhibiting amount of a compound of the formula wherein R and R are branched alkyl of 3 to 6 carbon atoms attached to the aromatic ring through a secondary or tertiary carbon atom and X individually is chlorine or bromine, admixed with a biologically inert carrier.
- composition as in claim 7 wherein the compound is 2,6-di-t-butyl-4-(trichlorovinylthio) phenol.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
2,6-Di-(branched alkyl)-4-(halovinylthio) phenol compounds of the formula
WHEREIN R1 and R2 are branched alkyl groups of 3 to 6 carbon atoms and X individually is hydrogen, fluorine, chlorine, bromine or iodine, with the proviso that at least one X is halogen, have morphogenetic hormonal mimetic activity on mosquitos.
WHEREIN R1 and R2 are branched alkyl groups of 3 to 6 carbon atoms and X individually is hydrogen, fluorine, chlorine, bromine or iodine, with the proviso that at least one X is halogen, have morphogenetic hormonal mimetic activity on mosquitos.
Description
United States Patent [191 Moore et a].
[ 1 Feb. 18, 1975 INSECTICIDAL PHENOLS [75] Inventors: Joseph E. Moore, Richmond;
Gustave K. Kohn, Berkeley, both of Calif.
[73] Assignee: Chevron Research Company, San
Francisco, Calif.
[22] Filed: Oct. 3, 1973 21 Appl. N07: 403,300
Related US. Application Data [63] Continuation-impart of Ser. No. 300,082, Oct. 24,
1972, Pat. No. 3,793,274.
OTHER PUBLICATIONS Chem. Abst. 75, 983176 (I971).
Chem. & Eng. News, 11/29/71, pp. 9-10.
Borkovec, Insect Chemosterilants, pp. 61-63, 1966.
Primary Examiner-Jerome D. Goldberg Assistant Examiner-Allen J. Robinson Attorney, Agent, or FirmG. F. Magdeburger; Jr. Stoner; Raymond Owyang 57 ABSTRACT 2,6-Di-(branched alkyl)-4-(halovinylthio) compounds of the formula phenol no scx=cx wherein R and R are branched alkyl groups of 3 to 6 carbon atoms and X individually is hydrogen, fluorine, chlorine, bromine or iodine, with the proviso that at least one X is halogen, have morphogenetic hormonal mimetic activity on mosquitos.
8 Claims, No Drawings INSECTICIDAL PHENOLS RELATED APPLICATION This application is a continuation-in-part of application Ser. No. 300,082, filed Oct. 24, 1972, now U.S. Pat. No. 3,798,274 the disclosure of which is incorporated herein by reference.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is concerned with insecticidal compounds which have morphogenetic hormonal mimetic activity. Compounds having morphogenetic hormonal mimetic activity exert a disrupting influence upon the normal development of insects. These compounds interfere with the normal metamorphosis of the pest insects and result in the formation of individual insects of the treated species which develop abnormally and are nonviable or sterile. This ultimately leads, indirectly at least, to the destruction of the insect population.
2. Description of the Prior Art Chemical and Engineering News, Nov. 29, 1971, pages 9l(). discloses the use of 2.6-di-t-butyl-4(a,adimcthylbenzyl) phenol as a mosquito larvicide.
Japanese Pat. No. 16,970, issued May 11, 1971 (Chem. Abs. 75, 983l7e [1971] discloses the use of 2,6-di-t-butyl-4-phenylthiophenol as an insecticide. U.K. Pat. No. 1,311,577 (Belgian Pat. No. 767,834) discloses the use of 2,6-di-t-butyl-4-alkylthiophenols for the control of mosquitos. U.I(. Pat. No. 1,313,597 discloses a process for preparing 4-arylthio-2,6- dialkylphenols.
SUMMARY OF THE INVENTION It has now been found that 2,6-di-(branched aIkyl)-4- halovinylphenols are effective for the control of mosquitos when applied in insecticidally effective amounts to pre-adult mosquitos.
DESCRIPTION OF THE INVENTION The phenols of the invention are represented by the formula (I) no sex-ex:
wherein R and R are branched alkyl groups of 3 to 6 carbon atoms attached to the aromatic ring through a secondary or tertiary carbon atom and X is individually hydrogen, fluorine, chlorine, bromine, or iodine, with the proviso that at least one X is a halogen. Preferably X is chlorine or bromine.
Representative branched alkyl groups which R and R may represent include s-propyl, s-butyl, t-butyl, tamyl, s-hexyl, etc. R and R may be the same or different branched alkyl groups. Preferred R and R groups are attached to the aromatic ring through a secondary carbon atom (i.e., a carbon atom substituted with two alkyl groups) or a tertiary carbon atom (i.e., a carbon atom substituted with three alkyl groups).
Representative phenols of formula I include: 2,6-di-t-butyl-4-( l-chlorovinylthio) phenol. 2,6-di-t-butyl-4-(2-chlorovinylthio) phenol. 2,6-di-t-butyl-4-(2,2-dichlorovinylthio) phenol. 2,6-di-t-butyl-4-( 1,2-dichlorovinylthio) phenol. 2,6-di-t-amyl-4-(trichlorovinylthio) phenol, 2,6-di-sec-butyl-4-(trichlorovinylthio) phenol. 2,6-diisopropyl-4-( l-bromovinylthio) phenol. 2,6-di-t-amy1-4-(Z-bromovinylthio) phenol. 2,6-di-sec-hexyl-4-( 1.Z-dibromovinylthio) phenol. 2,6-di-t-butyI-4-(lldibromovinylthio) phenol, 2,6-diisopropyl-4-(tribromovinylthio) phenol. 2-t-butyl-6-t-amyl-4-( l-chloro-2-bromovinylthio) phenol, 2-t-butyl-6-t-butyI-4-( l-chloro-2,2-
dibromovinylthio) phenol, 2-t-butyl-6-t-butyl-4-( l-bromo-2,2-
dichlorovinylthio) phenol, 2,6-di-t-butyl-4-( l-fluorovinylthio) phenol, 2,6-di-t-butyl-4-( I-iodovinylthio) phenol, 2,6-di-t-butyl-4-(2-fluorovinylthio) phenol, 2,6-di-t-butyl-4-(2,2-difluorovinylthio) phenol, 2,6-di-t-butyl-4-( l-chloro-2,2-difluorovinylthio) phenol, 2,6-di-t-butyl-4-(1-iodo-2,Z-dichlorovinylthio) phenol, 2,6-di-t-butyl-4-( l-fluoro-2,2-dichlorovinylthio) phenol, 2,6-di-t-butyl-4-( 1.2-difluorovinylthio) phenol. 2,6-di-t-butyl-4-(trifluorovinylthio) phenol. 2,6-di-t-butyl-4-( l-bromo-2.Z-difluorovinylthio) phenol, and 2,6-di-t-butyl-4-( l-fluoro-2,Z-dibromovinylthio) phenol. The phenols of formula I are prepared by the reaction of a 2,6-di(branched alkyl) phenol and a halovinylsulfenyl chloride as depicted in the following equation cx-cx s -m (II) (III) no s-cx-cx acl wherein R, R and X have the same significance as 6&
fined in formula I.
The reaction depicted in equation 1 is conducted by more or less conventional procedures. The molar ratio of the phenol (II) to the sulfenyl halide (III) is substantially equimolar. The reaction is conducted in a solvent such as acetic acid. Reaction temperatures suitably vary from 0 to C. The product is isolated by conventional methods such as extraction, distillation, crystallization, etc.
The compounds of the invention are useful as morphogenetic hormonal mimetic insecticides, particularly against mosquitos such as Aedes aegypti, Culex pipiens quinque fasciatus and Culiseta inornata.
The compounds are very potent and are used at extremely low concentrations. For example, compositions containing 100 to 0.01 ppm, preferably from 5 to 0.1 ppm, are effective for the control of insects. However, the effective concentration depends in part on the mode of application and the particular insect.
The compounds may be applied in either liquid or solid formulations to the pre-adult insects or their environment. For example, they may be sprayed or otherwise applied directly to plants or aqueous bodies so as to effect control of insects coming into contact therewith.
Formulations of the compounds of this invention will comprise a toxic amount of one or more of the compounds and a biologically inert carrier. Usually they will also contain a wetting agent. Solid carriers such as clay, talc, sawdust, alfalfa meal. and the like may be used in such formulations. Liquid diluents which may be used with these compounds include water and aromatic solvents. In addition, these formulations may contain other compatible pesticides, fillers, stabilizers, attractants and the like.
The concentration of the active ingredient to be used with inert carriers, either solid or liquid carriers, will be dependent upon many factors, such as the particular compound which is used, the carrier in or upon which it is incorporated, the method and conditions of application, the insect species to be controlled, etc., the proper consideration of these factors being within the skill of those versed in the art. In general, the toxic ingredients of this invention will be effective in concentrations from about 0.0001 percent by weight to as high as 50 percent by weight or higher. Economically, of
course, it is desirable to use lower concentrations of this active ingredient. Thus, it is usually desirable to use less than 20 percent by weight of the active ingredient in a particular composition.
The compounds of the invention are particularly useful in combination with mosquito larvicidal petroleum oil dispersions. Petroleum oils suitable as mosquito larvicidal dispersions are known. Such hydrocarbon oils include mineral oils such as naphthenic base and paraffinic base lubricating oils, etc., as well as synthetic oils. Such hydrocarbon oils are nonphytotoxic and generally contain not more than a few percent aromatics. Particularly suitable hydrocarbon oils have boiling points above 350 to 400F. and viscosities of from about 33 to 200 SSU at 100F.
The amount of the compound of the invention employed in petroleum oil generally ranges from 0.1 to percent by weight based on weight of oil. The hydrocarbon oil dispersions containing the compounds of the invention are contacted with or applied to the surface of the aqueous bodies wherein mosquito control is desired by conventional methods.
The terms "insecticide" and insect as used herein refer to their broad and commonly understood usage rather than to those creatures which in the strict biological sense are classified as insects. Thus, the term insect is used not only to include small invertebrate animals belonging to the class lnsccta but also to other related classes of arthropods whose members are segmented invertebrates having more or fewer than six legs, such as spiders, mites, ticks. centipedes. worms and the like.
EXAMPLE 1 1l0C./O.3 mm of Hg). The pot residue solidified on cooling. The residue was chromatographed on silica gel (hexane eluant) to give the crude product as a yellow solid. Recrystallization from hexane gave product which melted at 74-76C; Elemental analysis showed: %Cl, calculated 28.9, found 28.6; %S, calculated 8.7,
found 8.9. Y V
EXAMPLE 2 Preparation of 2,6-di-sec.-butyl-4-(trichlorovinylthio) phenol By a procedure similar to that of Example 1, 2,6-disec.-butyl-4-trichlorovinylthio) phenol was prepared from 2,6-di-sec.-butylphenol and trichlorovinylsulfenyl chloride. The product was obtained as a yellow oil after chromatography on silica gel and had the following elemental analysis: %Cl, calculated 28.9, found 28.8; 7(S, calculated 8.7, found 8.6.
EXAMPLE 3 2,6-Di-t-butyl-4-(trichlorovinylthio) phenol (Compound A) was tested as a morphogenetic hormonal mimetic insecticide against Yellow Fever mosquito larvae (Aedes aegypli) by the following procedure: Late fourth-stage larvae of the mosquito are placed in a cup containing 200 ml. of deionized water containing a known amount of the phenol compound dissolved therein. About 20 larvae are used per test. The larvae are fed and allowed to pupate. The live pupae are kept until the adult emerges. A count is made at each step for mortality, i.e., larvae, pupae and adult mortality.
For comparison, 2,6-di-t-butyl-4-(a,a-dimethylbenzyl) phenol (Compound B) was also tested. The concentration and the mortality counts are tabulated in Table I.
TABLE I Cone. Mortality Compound ppm Larvae Pupae Adults Total A 0.07 0 92.5 o 92.5 A 0.05 0 60 0 60 A 0.03 0 40 0 40 A 0.02 0 l5 0 15 A 0.0l 0 5 0 5 B 0.07 0 5 0 5 B 0.05 0 0 0 O B 0.03 0 0 0 0 B 0.02 0 0 0 (1 B 0.0l 0 0 0 0 2,6-Di-t-butyl-4-(trichlorovinyl) phenol was tested for the control of Aedes aegypti larvae by a procedure similar to that above, except that the phenol/water so- EXAMPLE 4 Petroleum Oil Formulation A 1 percent by weight formulation of 2,6-di-t-butyl- 4-(trichlorovinylthio) phenol was prepared with an oil composition having 96.1 percent by weight of a petroleum oil having an aromatic content of 8.4 percent by weight and a viscosity of 36.3 SSU at 100F, 0.9 percent by weight of ethoxylated dodecyl phenol (molecular weight 526 and 6 mols ethylene oxide per mol phenol) and 3 percent by weight of polyisobutenyl succinic anhydride (molecular weight 950).
The oil formulation was tested for the control of Acdcs uegypli larvae by applying a thin film of the oil formulation to a container containing larvae and I70 ml. ofwater. The larvae are fed and allowed to pupatc. After 2 days. a count is made of larva and pupa mortality. At a dosage corresponding to 0.33 gallon- /acre, the larva mortality was zero and the pupa mortality was 95 percent.
EXAMPLE 5 2.6-Di-sec.-butyl-4-(trichlorovinylthio) phenol was tested as a morphogenetic hormonal mimetic insecticide against Yellow Fever mosquito larvae by a procedure identical to that of Example 3. At a concentration of 1.7 ppm. the percent pupa mortality was 5 percent.
What is claimed is:
l. A method for killing mosquitos which comprises contacting pre-adult mosquitos with a metamorphosisinhibiting amount of a compound of the formula wherein R and R are branched alkyl of 3 to 6 carbon atoms attached to the aromatic ring through a secondary or tertiary carbon atom and X individually is chlorine or bromine, admixed with a biologically inert carrier.
6. A composition as in claim 5 wherein R and R are tertiary alkyl.
7. A composition as in claim 6 wherein X is chlorine.
8. A composition as in claim 7 wherein the compound is 2,6-di-t-butyl-4-(trichlorovinylthio) phenol.
Claims (8)
1. A METHOD FOR KILLING MOSQUITOS WHICH COMPRISES CONTACTING PRE-ADULT MOSQUITOS WITH A METAMORPHOSIS-INHIBITING AMOUNT OF A COMPOUND OF THE FORMULA
2. The method of claim 1 wherein R1 and R2 are tertiary alkyl.
3. The method of claim 2 wherein X is chlorine.
4. The method of claim 1 wherein the compound is 2,6-di-t-butyl-4-(trichlorovinylthio) phenol.
5. A composition comprising a metamorphosis-inhibiting amount of a compound of the formula
6. A composition as in claim 5 wherein R1 and R2 are tertiary alkyl.
7. A composition as in claim 6 wherein X is chlorine.
8. A composition as in claim 7 wherein tHe compound is 2,6-di-t-butyl-4-(trichlorovinylthio) phenol.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US403300A US3867547A (en) | 1972-10-24 | 1973-10-03 | Insecticidal phenols |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US30008272A | 1972-10-24 | 1972-10-24 | |
US403300A US3867547A (en) | 1972-10-24 | 1973-10-03 | Insecticidal phenols |
Publications (1)
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US3867547A true US3867547A (en) | 1975-02-18 |
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Application Number | Title | Priority Date | Filing Date |
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US403300A Expired - Lifetime US3867547A (en) | 1972-10-24 | 1973-10-03 | Insecticidal phenols |
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US (1) | US3867547A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3155733A (en) * | 1962-06-27 | 1964-11-03 | Dow Chemical Co | Aryloxyarylthioalkenyl ethers |
US3231623A (en) * | 1962-06-27 | 1966-01-25 | Dow Chemical Co | Propynyl thioether |
US3523146A (en) * | 1968-09-23 | 1970-08-04 | Nat Distillers Chem Corp | Tri(3,5-di-t-butyl-4-hydroxybenzylthioalkyl) phosphites |
-
1973
- 1973-10-03 US US403300A patent/US3867547A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3155733A (en) * | 1962-06-27 | 1964-11-03 | Dow Chemical Co | Aryloxyarylthioalkenyl ethers |
US3231623A (en) * | 1962-06-27 | 1966-01-25 | Dow Chemical Co | Propynyl thioether |
US3523146A (en) * | 1968-09-23 | 1970-08-04 | Nat Distillers Chem Corp | Tri(3,5-di-t-butyl-4-hydroxybenzylthioalkyl) phosphites |
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