DK157296B - 2-chlor-pyridinforbindelser til brug som udgangsmateriale ved fremstilling af herbicide pyridinforbindelser - Google Patents
2-chlor-pyridinforbindelser til brug som udgangsmateriale ved fremstilling af herbicide pyridinforbindelser Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D213/62—Oxygen or sulfur atoms
- C07D213/63—One oxygen atom
- C07D213/64—One oxygen atom attached in position 2 or 6
- C07D213/643—2-Phenoxypyridines; Derivatives thereof
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
- A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D213/61—Halogen atoms or nitro radicals
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D213/72—Nitrogen atoms
- C07D213/73—Unsubstituted amino or imino radicals
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- General Health & Medical Sciences (AREA)
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- Pest Control & Pesticides (AREA)
- Agronomy & Crop Science (AREA)
- Pyridine Compounds (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Plural Heterocyclic Compounds (AREA)
Description
DK 157296 B
Den foreliggende opfindelse angâr hidtil ukendte 2-ch1or-pyri-dinforbindelser til brug som udgangsmateriale ved fremstilling af herbicide pyridinforbindelser med den almene formel 5 R1 XXoXJ" 10 hvor Y er hydrogen eller et chloratom,
Rl er hydrogen eller et alkylradikal med 1-4 carbonatomer; og R2 er en cyanogruppe, en carboxylgruppe, en carboxamidogruppe -CNR3R4, hvori R3 er hydrogen eller et alkylradikal, og R4 er 15 " hydrogen, et eventuelt hydroxy- eller phenylsubstitueret alkylradikal med 1-4 carbonatomer, et phenyl- eller chlorphenyl-radikal, et alkoxyradikal med 1-4 carbonatomer eller en gruppe -Nr5r6, hvor R5 er hydrogen eller alkyl med 1-4 carbonatomer, 20 og R® er hydrogen, alkyl med 1-4 carbonatomer, phenyl eller chlorphenyl, eller gruppen -NR3R4 udger et pyrrolidino, pipe- ridino eller morfolinoradikal; en gruppe -CSR7, hvori R7 er
II
0 alkyl eller phenyl; en alkoxycarbonylgruppe, hvori alkoxygrup- 25 pen kan være ligekædet eller forgrenet, og som eventuelt bærer en eller flere hydroxy-, alkoxy- eller halogensubstituenter, eller bærer en substituent med formlen (I), hvori R2 er et
-C-O-radikal; en gruppe -C(0CH2CH2)n°R8» hvor R8 er et alkyl-II II
0 0 30 radikal med 1-4 carbonatomer, og n er et helt tal fra 1 til 5 inklusive; et cyklohexyloxycarbonylradikal, der eventuelt er substitueret med et eller flere ha 1ogenatorner eller methylra-dikaler; et alkenyloxycarbonylradikal, hvori alkenylgruppen indeholder fra 3 til 6 carbonatomer; et phenoxycarbonylradi-35 kal, der eventuelt bærer en eller flere halogen- eller methyl-substituenter; eller et benzy1oxycarbony1radikal, hvis phenyl-gruppe eventuelt bærer en eller flere halogen- eller methyl-substituenter; og hvor det drejer sig om forbindelser, hvori R2 er en carboxylgruppe, salte deraf.
DK 157296B
2
Forbindelserne ifelge opfindelsen er ejendommelige ved, at de har formlen -χχ hvor Y er hydrogen aller chlor.
10 Forbindelserne med formlen I har en uventet kraftigere herbi-cid virkning end tilsvarende forbindelser med et chloratom i stedet for CF3~gruppen i pyridinringens 5-stilling.
Forbindelserne ifelge opfindelsen omdannes ferst til de til-15 svarende hidtil ukendte 5-trif1uorforbindelser ved reaktion med et fluoreringsmiddel, f.eks. antimontrif1uorid eller fly-dende fluorbrinte, sàledes at der fâs udgangsmaterialerne II'· Disse kan sà omdannes til de herbicide pyridinforbindelser pà i og for sig kendte fremgangsmâder A, B og C.
20
Fremgangsmâde A skitseres af felgende skema: 25 30 35
DK 157296 B
3
Fremgangsmàde A
Y PCÎI3 • '"OC 0
OM
10
-W
Vo^-«h3 15 (III)
Demethyleringsmiddel F.jC Y
20 (HD £‘ek5· 9yridin -A γΥ
hydrochlorid OH
(IV) 25 1 | 9 Base (IV) + Hal-CH-κ -^ (I).
Ved fremgangsmàde A har symbolerne Rl, r2 og γ den betydning, 30 der tidligere er tillagt dem, Hal er et halogen, fortrinsvis chlor eller brom, og M er en kation, f.eks. natrium.
Ved fremgangsmàde A bringes halogenpyridinen 11' til at reage-re med et metalsalt af p-methoxyphenol, f.eks. natriumsaltet 35 af p-methoxyphenol. Reaktionen udferes fortrinsvis i et oples-ningsmiddel eller fortyndingsmiddel, f.eks. methylethylketon, tetrahydrofuran, dimethylsulfoxid eller dimethylacetamid. Den sàledes fremkomne 2-p-methoxy-phenoxyforbindelse (III) dime-
DK 157296 B
4 thyleres sâ pâ en standardmâde, f.eks. ved opvarmning med py-ridinhydrochlorid eller med hydrogenbromid i eddikesyre til dannelse af den tilsvarende p-hydroxyforbindelse (IV). Denne bliver sâ i form af sit metalsalt (f.eks. natrium- eller kali-5 umsaltet) bragt til at reagere med det onskede halogenalkansy-rederivat (V) til dannelse af den onskede forbindelse I. For-trinsvis udfores denne reaktion i et oplosningsmiddel eller fortyndingsmiddel, f.eks. methylethy1keton.
10 Fremgangsmàde B skitseres i folgende skema: <ΓΙ+ HO-0HH - Βί3β > (IV) 15 R1 (IV) + . Hal-CH-R2 -^ (I) 20 Ifolge fremgangsmàde B bliver 2-halogenpyridinen (II") bragt til at reagere med- hydroquinon i nærværelse af en base til dannelse af p-hydroxyphenoxyforbindelsen (IV), der allerede er omtalt under fremgangsmàde A. Reaktionen udfores fortrinsvis i et oplosningsmiddel eller fortyndingsmiddel for reaktionsdel- 25 tagerne. Eksemprler pâ egnede oplosni ngsmidler indbefatter aprote oplosningsmidler, f.eks. dimethylformamid. Reaktionen fremskyndes fortrinsvis ved opvarmning f.eks. til en tempera-tur i intervallet fra 50 til 150°C. Basen anvendt til reaktionen kan f.eks. være en uorganisk base, f.eks. natrium- eller 30 kaliumcarbonat.
Det andet trin i fremgangsmàde B er identisk med det sidste trin i fremgangsmàde A, og kræver ingen yderligere beskrivel-se.
35
DK 157296 B
5
Fremgangstnàde C
5 (II.) + HO—QCH.-R2 BaS^ W
(VI) 10 ïfolge fremgangsmàde C bliver 2-halogenpyridinen (II1) bragt til at reagere med et 2-(p-hydroxyphenoxy)propionsyrederivat VI i nærværelse af en base, hvilket giver forbindelsen I di-rekte. Derivaterne VI er kendt i sig selv, eller kan fremstil-les pâ sædvanlige mâder. Reaktionen udf0res fortrinsvis i nær-15 værelse af et oplosningsmiddel eller fortyndingsmiddel for reaktionsdeltagerne. Eksempler pâ oplesningsmidler indbefatter lavere ketoner, f.eks. methylethylketon. Reaktionen kan frem-skyndes ved opvarmning, og kan f.eks. bekvemt udfores ved op-losningsmidlets tllbagesvalingstemperatur. Eksempler pâ baser 20 til brug ved reaktionen indbefatter uorganiske baser, f.eks. vandfri kaliumcarbonat.
Udgangsmaterialerne II ifelge opfindelsen kan selv fremstilles pâ forskellige mâder. Sâledes kan 2-chlor-5-trichlormethylpy-25 ridin f.eks. fàs ved reaktion af 3-methylpyridin med chlor i væskefase under indflydelse af ultraviolet lys. Reaktionen af 3-methylpyridin (som fri base eller i form af et sait) med chlor udfores i almindelighed i et indifferent organisk oplos-ningsmiddel. Bekvemt er oplosningsmidlet en halogeneret hydro-30 carbon, f.eks. tetrachlorcarbon, med andre oplosningsmidler kan anvendes, f.eks. hydrocarboner eller ethere, forudsat at de ikke reagerer under de anvendte betingelser til dannelse af uacceptable mængder uonskede biprodukter. Reaktionen er lang-som ved eller under stuetemperatur, og fremskyndes derfor be-35 kvemt ved hjælp af varme. Hensigtsmæssige reaktionstemperatu-rer er f.eks. i intervallet 50 til 130eC. Oplosningen kan op-varmes under ti1bagesvaling. Det foretrækkes at anvende terre reaktionsdeltagere og oplesningsmidler. Ultraviolet lys kan
DK 157296 B
6 tilferes reaktionen fra en egnet elektn'sk lampe, soin med hen-blik pâ sterste effektivitet kan være neddykket i reaktions-blandingen. Reaktionen giver i almindelighed en blanding af produkter, hvorfra den enskede 2-chlor-5-trich1ormethylpyridin 5 kan isoleres pâ sædvanlige màder, f.eks. ved desti11ation.
Fremstilling af forbindelserne ifolge opfindelsen.
Fremstillinq af 2-ch1or-5-trichlormethylpvridin 10 A. 55 g 2-brom~5-methylpyridin i ter tetrachlorcarbon (600 ml) blev filtreret og derefter behandlet med ter chlorbrinte til dannelse af hydrochloridet. Det faste stof, der udskil-te sig, blev opbrudt, og blandingen opvarmet til tilbage- 15 svaling. Ter chlor blev ledet gennem den kogende blanding i 6½ time under bestrâling med en ultraviolet lampe anbragt inde i reaktionskolben. Blandingen blev sâ afkelet, filtreret og inddampet til en bleggul væske, som sterknede ved afkeling. Denne blev identificeret som den nedvendige chlor-20 forbindelse ved sit kernemagnetiske resonansspektrum.
B. 10 ml 3-methylpyridin blev oplest i 300 ml ter tetrachlorcarbon. Oplesningen blev opvarmet til tilbagesvaling (ca. 80°C), og ter chlorgas blev ledet gennem den kogende blan- 25 ding i 3 timer, samtidig med at- de blev bestràlet i det indre fra en 100 watt ultraviolet lampe, der gav lys med en belgelængde pâ 185 nm. Præparativ tyndlagskromatografi (s i-lica, chloroform/cyklohexan) pâ en inddampet preve af op-lesningen gav tre hovedprodûkter i et samlet udbytte pâ 10 30 15%. Det mest rigelige af disse blev identificeret ved sit kernemagnetiske resonsspektrum som den enskede 2-chlor-5-trichlormethylpyridin. Dette blev bekræftet ved massespek-trografisk analyse af den fremkomne oplesning. De andre to hovedprodûkter var 2~chlor-3-trichlormethylpyridin og et 35 di(trichlormethyl)pyridin, som fandtes i en mængde pâ ca.
henholdsvis halvdelen og ca. en tiendedel af hovedproduk-tet.
f 4
DK 157296 B
7 C. 15 g 3-methylpyridin i 200 ml ter tetrachlorcarbon blev be-handlet med ter HCl gas til dannelse af hydrochloridet. Den derved fremkomne olieagtige blanding blev omrert og opvar-met til ti1bagesvaling. Ter chlorgas blev boblet ind i den 5 under ti1bagesvaling værende blanding i 4 timer, medens der i det indre blev belyst med en ultraviolet lampe anvendt i A ovenfor. Reaktionsblandingen blev sâ afkelet og fraskilt ved dekantering i oplesning og oli'eagtigt fast stof. Sidst-nævnte blev renset og pàvist at indeholde ureageret 3-me-10 thy1pyridinsalt. Forstnævnte blev inddampet til et olieag- tigt halvfast stof, som ved tyndtlagskromatograf i blev pàvist at hâve egenskaberne af 2-ehlor-5-trichlormethylpyri-d ί n.
15 Fremstillinq af 2,3-dichlor-5-trich1ormethylpyridin 108 g 2-amino-5-methy1pyridin i 300 ml iseddike blev opvarmet til 90-100°C, medens 160 g brom i 55 ml eddikesyre langsomt blev tilsat under omroring. Efter endt tilsætning blev blan-20 ding en omrert og opvarmet i yderligere 30 minutter og fik sâ lov at afkele natten over. Det faste stof, der udskilte sig, blev filtreret og blandet med is, og blandingen neutraliseret med koncentreret ammoniak, idet temperaturen blev holdt pâ 0 til 5°C. Det faste stof blev opsamlet, vasket med vand og ter-25 ret til dannelse af 2-amino-3-brom-5-methylpyridin.
145 g af dette produkt blev oplest i 750 ml koncentreret salt-syre og 450 ml vand, og oplesningen blev afkelet til -10°C. 54 g natriumnitrit i 450 ml koldt vand blev tilsat dràbevis under 30 omrering i lebet af 90 minutter, medens blandingen blev holdt ved -5°C. Oplosningen blev omrert i yderligere 2 timer og sâ gjort basisk med koncentreret ammoniak, idet temperaturen blev holdt under 20°C. Det faste stof, der udskilte sig, blev vasket med vand terret. oplest i ether (1500 ml) og vasket med 35 kold natriumhydroxidoplesning (IM, 1 1). Ehteroplesningen blev vasket to gange med vand (portioner pâ 1 liter), torret og inddampet til dannelse af 3-brom-2-chlor-5-methy1pyridin.
8
DK 157296 B
54 g af dette produkt i 650 ml ter tetrachlorcarbon blev be-handlet med ter chlorbrinte. Bundfaldet blev opbrudt, og sus-pensionen opvarmet under tilbagesvaling, medens ter chlor blev boblet ind i blandingen under bestrâling fra en ultraviolet 5 lyskilde. Efter 4½ time blev blandingen afkelet, filtreret, og filtratet inddampet til dannelse af 2,3dichlor-5-trichlorme-thylpyridin. Massespektret var i overensstemmelse med den struktur, som er tillagt denne forbindelse.
10 Fremsti11ing af mel1emprudkterne II'
Fremstilling af 2-chlor-5-trif1uormethvlpyridin A. 18 g 2-chlor-5-trich1 ormethylpyridin og 50 g antimontri-15 fluorid blev opvarmet sammen til 140-145°C i 1 time. Blan dingen blev afkelet, blandet med is og koncentreret saltsy-re og ekstraheret med ether. Ekstrakterne blev vasket med vand, terret med magniumsulfat og inddampet. Produkterne fra flere sâdanne fremsti11inger blev forenede og destille-20 ret ved atmosfæretryk gennem en kort sejle pakket med
Fenske ringe. Produktet, der koger ved 124-154eC, blev op-samlet og identificeret som 2-chloi—5-trif1uormethy1pyri-din.
25 B. 30,8 g 2-chlor-5-trichlormethylpyridin og 80 g vandfri hy-drogenfluorid blev opvarmet til 200°C i 10 timer under om-rering i en autoklav. Blandingen blev afkelet, hældt pâ is og neutraliseret ved 0°C. Blandingen blev filtreret, og remanensen og filtratet ekstraheret med ether. Etherek-30 strakterne blev vasket med vand, terret og inddampet til dannelse af en olie. Denne blev destilleret, og fraktionen, der koger ved 140-154°C, blev opsamlet. Analyse viste, at denne bestod af 2-chlor-5-trif1uormethylpyridin sammen med noget 2-fluor-5-trif 1uormethyIpyridin.
35
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9
Fremstilling af 2,3-cMchlor-5-trifluormethylpyridin A. 1,0 g 2,3-dichlor-5-trichlormethylpyridin og 3,0 g antimon-trifluorid blev opvarmet sammen til 170-180°c i 30 minut- 5 ter. Blandingen blev sâ afkolet, blandet med is og vand og ekstraheret med ether. Etherekstrakterne gav en brun olie indeholdende en blanding af 2,3-dichlor-5-trif1uormethylpy-ridin og 3-chlor-2-fluor-5-trifluormethylpyridin sammen med en mindre mængde 2,3-dichlor-3-chlordifluormethylpyridin.
10 B. 35 g 2,3-dichlor-5-trichlormethylpyridin blev opvarmet med 100 g vandfri hydrogenfluorid i en autoklav til 200°C i 10 timer under omroring. Den afkolede reaktionsblanding blev hældt pà is og neutraliseret med natriumhydroxid ved 0°C.
15 Blandingen blev ekstraheret med 750 ml methy1enchlorid. Ek- strakterne blev vasket med vand (500 ml), natriumcarbonat-oplosning (500 ml) og vand (500 ml) torret og inddampet.
Den tilbageblevne olie blev destilleret, og fraktionen med kogepunkt 77 til 83eC/25 torr blev opsamlet og identifice- 20 ret som 2,3-dichlor-5-trifluormethylpyridin.
C. 61 g antimontrifluorid blev smeltet i vakuum for at fjerne fugtighed. Det afkolede materiale blev opbrudt og opvarmet til 65-70°C, medens 6,6 g antimonpentachlorid blev tilsat 25 dràbevis under omroring. 40 g 2,3-dichlor-5-trichlormethyl- pyridin blev derefter tilsat dràbevis til blandingen, og det hele blev opvarmet til 160°C i lobet af 45 minutter. Blandingen blev afkolet og dampdesti11eret. Olien, som de-stillerede over, blev ekstraheret med ether (2 x 100 ml).
30 Etherekstrakten blev vasket med vinsyreoplosning, derpà vand, natriumbicarbonat og vand og torret. Den tilbageblev-ne olie blev destilleret. Fraktionen, der koger ved 71 til 80°C/18 torr, blev identificeret som 2,3-dichlor-5-tri-• fluormethylpyridin.
35
Claims (1)
15 Rl er hydrogen eller et alkylradikal med 1-4 carbonatomer; og R2 er en cyanogruppe, en carboxylgruppe, en carboxamidogruppe -CNR3R4, hvor R3 er hydrogen eller et alkylradikal, og R4 er il 0 hydrogen, et eventuelt hydroxy- eller phenylsubstitueret al- 20 kylradikal med 1-4 carbonatomer, et phenyl- eller chlorphenyl- radikal, et alkoxyradikal med 1-4 carbonatomer eller en gruppe -NR5R®, hvor R5 er hydrogen eller alkyl med 1-4 carbonatomer, og R6 er hydrogen, alkyl med 1-4 carbonatomer, phenyl eller chlorphenyl, eller gruppen -NR3R4 udgor et pyrrolidino, pipe- 25 ridino eller morfolinoradikal ; en gruppe -CSR?, hvori R? er II 0 alkyl eller phenyl; en alkoxycarbonylgruppe, hvori alkoxygrup- pen kan være ligekædet eller forgrenet, og som eventuelt bærer en eller flere hydroxy-, alkoxy- eller halogensubstituenter, 30 eller bærer en substituent med formlen (I), hvori R2 er et -C-0- radikal; en gruppe -C(OCH2CH2)n0R8· hvor R8 er et alkyl-II II 0 0 radikal med 1-4 carbonatomer, og n er et helt tal fra 1 til 5 inklusive; et cyklohexy1oxycarbony1radikal, der eventuelt er 35 substitueret med et eller flere halogenatomer eller methylra-dikaler; et alkenyloxycarbonylradikal, hvori alkenylgruppen indeholder fra 3 til 6 carbonatomer; et phenoxycarbony1radi-kal, der eventuelt bærer en eller flere halogen- eller methyl- DK 157296 B substituenter; eller et benzyloxycerbonylradikal, hvis phe-nylgruppe eventuelt bsrer en eller flere halogen- eller me-thylsubstituenter; og hvor det dre.jer. sig om forbindelser, hvori R2 er en carboxylgruppe, salte deraf, kendeteg-5 net ved, at de har formlen 10 hvor Y er hydrogen eller chlor. 15 20 25 30 35
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3403977 | 1977-08-12 | ||
GB3403977 | 1977-08-12 | ||
GB4454177 | 1977-10-26 | ||
GB4454177 | 1977-10-26 | ||
GB523078 | 1978-02-09 | ||
GB523078 | 1978-02-09 |
Publications (3)
Publication Number | Publication Date |
---|---|
DK357878A DK357878A (da) | 1979-02-13 |
DK157296B true DK157296B (da) | 1989-12-04 |
DK157296C DK157296C (da) | 1990-05-07 |
Family
ID=27254605
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK357878A DK157296C (da) | 1977-08-12 | 1978-08-14 | 2-chlor-pyridinforbindelser til brug som udgangsmateriale ved fremstilling af herbicide pyridinforbindelser |
DK259487A DK259487D0 (da) | 1977-08-12 | 1987-05-21 | Herbicide pyridinforbindelser |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK259487A DK259487D0 (da) | 1977-08-12 | 1987-05-21 | Herbicide pyridinforbindelser |
Country Status (20)
Country | Link |
---|---|
US (5) | US4324627A (da) |
EP (4) | EP0001473B1 (da) |
JP (3) | JPS5432479A (da) |
AU (2) | AU572085B2 (da) |
BR (1) | BR7808677A (da) |
CA (5) | CA1205805A (da) |
DD (1) | DD139988A5 (da) |
DE (4) | DE2862491D1 (da) |
DK (2) | DK157296C (da) |
ES (3) | ES472501A1 (da) |
GR (1) | GR64540B (da) |
HU (1) | HU189134B (da) |
IE (3) | IE48167B1 (da) |
IL (3) | IL62140A (da) |
IT (1) | IT1099592B (da) |
MY (1) | MY101299A (da) |
NZ (2) | NZ188041A (da) |
PT (1) | PT68410A (da) |
WO (1) | WO1979000094A1 (da) |
YU (3) | YU40919B (da) |
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GB1421619A (en) * | 1972-06-14 | 1976-01-21 | Merck & Co Inc | Oxazolopyridines and thiazolopyridines |
DK154074B (da) * | 1974-10-17 | 1988-10-10 | Ishihara Sangyo Kaisha | Alfa-(4-(5 eller 3,5 substitueret pyridyl-2-oxy)-phenoxy)-alkan-carboxylsyrer eller derivater deraf til anvendelse som herbicider, herbicidt middel samt fremgangsmaader til bekaempelse af ukrudt |
JPS51142537A (en) * | 1975-05-30 | 1976-12-08 | Ishihara Sangyo Kaisha Ltd | A herbicide |
DK154213B (da) * | 1977-07-21 | 1988-10-24 | Ishihara Sangyo Kaisha | 4-(5-trifluormethyl-2-pyridyloxy)phenoxyalkancarboxylsyrer og derivater deraf, herbicidt middel indeholdende dem samt fremgangsmaade til bekaempelse af ukrudt under anvendelse af midlet |
DK156830B (da) * | 1977-07-22 | 1989-10-09 | Dow Chemical Co | Trifluormethylpyridyl(oxy/thio)phenoxypropionsyreforbindelser til anvendelse i herbicider, herbicidt middel, samt fremgangsmaade til bekaempelse af uoensket plantevaekst |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK156511C (da) * | 1977-12-24 | 1995-05-22 | Hoechst Ag | Optisk aktive, p-substituerede alfa-phenoxy-propionsyrederivater med anvendelse som herbicider |
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