TW349001B - Halogenopyrimidines. - Google Patents

Halogenopyrimidines. Download PDF

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Publication number
TW349001B
TW349001B TW86100357A TW86100357A TW349001B TW 349001 B TW349001 B TW 349001B TW 86100357 A TW86100357 A TW 86100357A TW 86100357 A TW86100357 A TW 86100357A TW 349001 B TW349001 B TW 349001B
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TW
Taiwan
Prior art keywords
group
page
cns
please read
ministry
Prior art date
Application number
TW86100357A
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English (en)
Chinese (zh)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication of TW349001B publication Critical patent/TW349001B/zh

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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D273/00Heterocyclic compounds containing rings having nitrogen and oxygen atoms as the only ring hetero atoms, not provided for by groups C07D261/00 - C07D271/00
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D413/00Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms
    • C07D413/02Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings
    • C07D413/12Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings linked by a chain containing hetero atoms as chain links
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D413/00Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms
    • C07D413/14Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing three or more hetero rings

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
  • Indole Compounds (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
TW86100357A 1996-01-22 1997-01-15 Halogenopyrimidines. TW349001B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19602095A DE19602095A1 (de) 1996-01-22 1996-01-22 Halogenpyrimidine

Publications (1)

Publication Number Publication Date
TW349001B true TW349001B (en) 1999-01-01

Family

ID=7783320

Family Applications (1)

Application Number Title Priority Date Filing Date
TW86100357A TW349001B (en) 1996-01-22 1997-01-15 Halogenopyrimidines.

Country Status (34)

Country Link
US (2) US6103717A (Direct)
EP (1) EP0882043B1 (Direct)
JP (1) JP3262277B2 (Direct)
KR (1) KR100383906B1 (Direct)
CN (3) CN1213037C (Direct)
AT (1) ATE223407T1 (Direct)
AU (1) AU720066B2 (Direct)
BG (1) BG64178B1 (Direct)
BR (1) BR9707160A (Direct)
CA (1) CA2243591C (Direct)
CL (1) CL2004001128A1 (Direct)
CO (1) CO4770925A1 (Direct)
CZ (1) CZ295548B6 (Direct)
DE (2) DE19602095A1 (Direct)
DK (1) DK0882043T3 (Direct)
ES (1) ES2180021T3 (Direct)
FR (1) FR06C0042I2 (Direct)
HK (1) HK1045310A1 (Direct)
HU (1) HU227488B1 (Direct)
ID (1) ID15839A (Direct)
IL (1) IL124974A (Direct)
IN (2) IN187450B (Direct)
MX (1) MX203302B (Direct)
NL (1) NL350025I1 (Direct)
NZ (1) NZ325869A (Direct)
PL (1) PL187756B1 (Direct)
PT (1) PT882043E (Direct)
RU (1) RU2191186C2 (Direct)
SK (1) SK283815B6 (Direct)
TR (1) TR199801392T2 (Direct)
TW (1) TW349001B (Direct)
UA (1) UA56156C2 (Direct)
WO (1) WO1997027189A1 (Direct)
ZA (1) ZA97478B (Direct)

Families Citing this family (90)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19706396A1 (de) 1996-12-09 1998-06-10 Bayer Ag Verfahren zur Herstellung von 3-(l-Hydroxiphenyl-l-alkoximinomethyl)dioxazinen
RU2192743C2 (ru) * 1996-12-10 2002-11-20 Байер Акциенгезелльшафт Композиции из веществ с фунгицидной активностью
DE19739982A1 (de) 1996-12-10 1998-06-18 Bayer Ag Fungizide Wirkstoffkombinationen
DE19713762A1 (de) * 1997-04-03 1998-10-08 Bayer Ag Methoximinomethyldioxazine
DE19716257A1 (de) 1997-04-18 1998-10-22 Bayer Ag Fungizide Wirkstoffkombination
US6297236B1 (en) 1998-04-06 2001-10-02 Bayer Aktiengesellschaft Fungicide active substance combinations
WO1998055454A2 (en) * 1997-06-05 1998-12-10 Takeda Chemical Industries, Ltd. Benzofurans and benzothophenes as suppressors of neurodegeneration
DE19744705A1 (de) 1997-10-10 1999-04-15 Bayer Ag Verfahren zur Herstellung gegebenenfalls substituierter Benzofuranone
DE19819828A1 (de) 1998-05-04 1999-11-11 Bayer Ag Methoximinomethyloxathiazine
DE69900297T2 (de) * 1998-07-14 2002-05-02 Basf Ag Akarizid und insektizid wirksame, substituierte Pyrimidine und Verfahren zu ihrer Herstellung
DE19939841A1 (de) * 1998-11-20 2000-05-25 Bayer Ag Fungizide Wirkstoffkombinationen
DE19857963A1 (de) * 1998-12-16 2000-06-21 Bayer Ag Agrochemische Formulierungen
WO2000042039A1 (de) 1999-01-13 2000-07-20 Basf Aktiengesellschaft Azadioxacycloalkene und ihre verwendung zur bekämpfung von schadpilzen und tierischen schädlingen
WO2001036399A1 (de) * 1999-11-12 2001-05-25 Basf Aktiengesellschaft Azadioxacycloalkene
ES2197124T3 (es) 1999-12-13 2004-01-01 Bayer Cropscience Ag Combinaciones de productos activos fungicidas.
DE10014607A1 (de) 2000-03-24 2001-09-27 Bayer Ag Verfahren zur Herstellung von unsymmetrischen 4,6-Bis(aryloxy pyrimidin-Derivaten
DE10019758A1 (de) * 2000-04-20 2001-10-25 Bayer Ag Fungizide Wirkstoffkombinationen
DE10103832A1 (de) * 2000-05-11 2001-11-15 Bayer Ag Fungizide Wirkstoffkombinationen
DE10049804A1 (de) * 2000-10-09 2002-04-18 Bayer Ag Wirkstoffkombinationen mit fungiziden und akariziden Eigenschaften
DE10059605A1 (de) 2000-12-01 2002-06-06 Bayer Ag Fungizide Wirkstoffkombinationen
DE10209145A1 (de) * 2002-03-01 2003-09-04 Bayer Cropscience Ag Halogenbenzole
AU2003226774A1 (en) * 2002-04-05 2003-10-20 Basf Aktiengesellschaft Fungicidal mixtures based on benzamidoxime derivatives and a strobilurin derivative
PT1496745E (pt) * 2002-04-10 2011-02-24 Basf Se Método para aumentar a resistência de plantas à fitotoxicidade de agroquímicos
DE10228104A1 (de) * 2002-06-24 2004-01-15 Bayer Cropscience Ag Fungizide Wirkstoffkombination
HRP20050696B1 (en) 2003-01-14 2008-10-31 Arena Pharmaceuticals Inc. 1,2,3-trisubstituted aryl and heteroaryl derivatives as modulators of metabolism and the prpphylaxis and treatment of disorders related thereto such as diabetes and hyperglycemia
AR045047A1 (es) 2003-07-11 2005-10-12 Arena Pharm Inc Derivados arilo y heteroarilo trisustituidos como moduladores del metabolismo y de la profilaxis y tratamiento de desordenes relacionados con los mismos
DE10337885A1 (de) 2003-08-18 2005-03-24 Bayer Cropscience Ag Verfahren zur Herstellung von α-Fluormalonsäuredialkylestern
DE10343872A1 (de) * 2003-09-23 2005-04-21 Bayer Cropscience Ag Suspensionskonzentrate
DE10347090A1 (de) 2003-10-10 2005-05-04 Bayer Cropscience Ag Synergistische fungizide Wirkstoffkombinationen
DE10349501A1 (de) 2003-10-23 2005-05-25 Bayer Cropscience Ag Synergistische fungizide Wirkstoffkombinationen
PT1744629E (pt) 2004-04-30 2013-01-31 Basf Se Misturas fungicidas
DE102004033525A1 (de) * 2004-07-08 2006-02-02 Lanxess Deutschland Gmbh Verbessertes Verfahren zur Herstellung kernfluorierter Aromaten
DE102004040702B4 (de) 2004-08-23 2019-03-28 Bayer Cropscience Aktiengesellschaft Verfahren zur Herstellung eines Dioxazin-Derivats
DE102004049761A1 (de) 2004-10-12 2006-04-13 Bayer Cropscience Ag Fungizide Wirkstoffkombinationen
DOP2006000010A (es) 2005-01-10 2006-07-31 Arena Pharm Inc Procedimiento para preparar eteres aromáticos
MY148521A (en) 2005-01-10 2013-04-30 Arena Pharm Inc Substituted pyridinyl and pyrimidinyl derivatives as modulators of metabolism and the treatment of disorders related thereto
RU2490894C2 (ru) 2005-02-22 2013-08-27 Басф Се Композиция и способ повышения жизнеспособности растений
DE102005015677A1 (de) 2005-04-06 2006-10-12 Bayer Cropscience Ag Synergistische fungizide Wirkstoffkombinationen
DE102005026482A1 (de) 2005-06-09 2006-12-14 Bayer Cropscience Ag Wirkstoffkombinationen
CA2916460C (en) 2005-06-09 2017-10-03 Klaus Stenzel Combinations comprising prothioconazole and gulfosinate
CN100443463C (zh) * 2005-06-28 2008-12-17 沈阳化工研究院 取代的对三氟甲基苯醚类化合物及其制备与应用
DE102005035300A1 (de) * 2005-07-28 2007-02-01 Bayer Cropscience Ag Synergistische fungizide Wirkstoffkombinationen
DE602006012716D1 (de) * 2005-10-28 2010-04-15 Basf Se Verfahren zur induktion von resistenz gegen schadpilze
BRPI0708713A2 (pt) * 2006-03-10 2011-06-07 Basf Se uso de um composto ativo, e, método para melhorar a toleráncia das plantas às baixas temperaturas
KR20080111058A (ko) * 2006-03-14 2008-12-22 바스프 에스이 세균증에 대해 식물의 내성을 유도하는 방법
US8273686B2 (en) 2006-03-24 2012-09-25 Basf Se Method for combating phytopathogenic fungi
DE102006023263A1 (de) 2006-05-18 2007-11-22 Bayer Cropscience Ag Synergistische Wirkstoffkombinationen
KR20090068338A (ko) 2006-09-18 2009-06-26 바스프 에스이 안트라닐아미드 살곤충제 및 살진균제를 포함하는 살충 혼합물
CA2675367A1 (en) 2007-02-06 2008-08-14 Basf Se Pesticidal mixtures
CA2682294A1 (en) 2007-04-23 2008-10-30 Basf Se Plant productivity enhancement by combining chemical agents with transgenic modifications
EP2000030A1 (de) * 2007-06-06 2008-12-10 Bayer CropScience AG Fungizide Wirkstoffkombinationen
CL2008001930A1 (es) * 2007-06-29 2009-09-25 Basf Se Metodo para incrementar la resistencia de una planta o de una semilla de la misma al estres abiotico que comprende el tratamiento de la semilla con al menos un fungicida de estrobilurina; y uso de dichos compuestos.
UA103008C2 (ru) 2007-09-26 2013-09-10 Басф Се Трехкомпонентные фунгицидные композиции, содержащие боскалид и хлороталонил
DE102007045920B4 (de) 2007-09-26 2018-07-05 Bayer Intellectual Property Gmbh Synergistische Wirkstoffkombinationen
US20100272853A1 (en) * 2007-12-21 2010-10-28 Basf Se Method of Increasing the Milk and/or Meat Quantity of Silage-Fed Animals
EP2100506A2 (en) 2009-01-23 2009-09-16 Bayer CropScience AG Uses of fluopyram
AU2009342807B2 (en) 2009-03-25 2015-04-02 Bayer Cropscience Aktiengesellschaft Synergistic combinations of active ingredients
JP5642786B2 (ja) 2009-07-16 2014-12-17 バイエル・クロップサイエンス・アーゲーBayer Cropscience Ag フェニルトリアゾール類を含む相乗的活性化合物組み合わせ
WO2011026796A1 (en) 2009-09-01 2011-03-10 Basf Se Synergistic fungicidal mixtures comprising lactylates and method for combating phytopathogenic fungi
CN103539791B (zh) 2010-09-22 2017-01-11 艾尼纳制药公司 Gpr119 受体调节剂和对与其相关的障碍的治疗
MX2013006737A (es) 2010-12-20 2013-07-15 Basf Se Mezclas de activos pesticida que comprende compuestos de pirazol.
EP2481284A3 (en) 2011-01-27 2012-10-17 Basf Se Pesticidal mixtures
WO2012127009A1 (en) 2011-03-23 2012-09-27 Basf Se Compositions containing polymeric, ionic compounds comprising imidazolium groups
AR085587A1 (es) 2011-04-13 2013-10-09 Bayer Cropscience Ag Combinaciones de compuestos activos
AR085588A1 (es) 2011-04-13 2013-10-09 Bayer Cropscience Ag Combinaciones de compuestos activos
CN103987261A (zh) 2011-09-02 2014-08-13 巴斯夫欧洲公司 包含芳基喹唑啉酮化合物的农业混合物
CN102396484A (zh) * 2011-12-03 2012-04-04 陕西美邦农药有限公司 一种含异菌脲和甲氧基丙烯酸酯类的杀菌组合物
CN102640758B (zh) * 2012-04-24 2013-11-13 杭州宇龙化工有限公司 一种含有噻呋酰胺与氟嘧菌酯的杀菌组合物
CN103371153B (zh) * 2012-04-28 2016-12-14 陕西韦尔奇作物保护有限公司 含噻呋酰胺与甲氧基丙烯酸酯类的杀菌组合物
WO2013189801A1 (en) 2012-06-20 2013-12-27 Basf Se Pyrazole compound and pesticidal mixtures comprising a pyrazole compound
US20150257383A1 (en) 2012-10-12 2015-09-17 Basf Se Method for combating phytopathogenic harmful microbes on cultivated plants or plant propagation material
BR112015014753B8 (pt) 2012-12-20 2020-03-03 Basf Agro Bv composições, uso de uma composição, método para o combate de fungos fitopatogênicos e uso dos componentes
EP2783569A1 (en) 2013-03-28 2014-10-01 Basf Se Compositions comprising a triazole compound
US9193698B2 (en) * 2013-07-08 2015-11-24 Advinus Therapeutics, Ltd. Process for preparing fluoxastrobin
EP2835052A1 (en) 2013-08-07 2015-02-11 Basf Se Fungicidal mixtures comprising pyrimidine fungicides
WO2015036059A1 (en) 2013-09-16 2015-03-19 Basf Se Fungicidal pyrimidine compounds
WO2015036058A1 (en) 2013-09-16 2015-03-19 Basf Se Fungicidal pyrimidine compounds
CN104430366A (zh) * 2013-09-24 2015-03-25 中国中化股份有限公司 取代芳醚类化合物作为抗植物病毒剂的应用
CN105284832A (zh) * 2014-05-29 2016-02-03 深圳诺普信农化股份有限公司 杀菌组合物
EP2979549A1 (en) 2014-07-31 2016-02-03 Basf Se Method for improving the health of a plant
CN104186501A (zh) * 2014-09-22 2014-12-10 江苏省绿盾植保农药实验有限公司 一种含有叶菌唑和氟嘧菌酯的杀菌组合物及其应用
ES2774793T3 (es) 2014-10-24 2020-07-22 Basf Se Partículas pesticidas orgánicas
EP3242666B9 (en) 2015-01-06 2024-12-25 Arena Pharmaceuticals, Inc. Compound for use in treating conditions related to the s1p1 receptor
EP2910126A1 (en) 2015-05-05 2015-08-26 Bayer CropScience AG Active compound combinations having insecticidal properties
EP3310760B8 (en) 2015-06-22 2022-10-19 Arena Pharmaceuticals, Inc. Crystalline l-arginine salt of (r)-2-(7-(4-cyclopentyl-3-(trifluoromethyl)benzyloxy)-1,2,3,4-tetrahydrocyclo-penta[b]indol-3-yl)acetic acid for use in s1p1 receptor-associated disorders
CN106543163A (zh) * 2016-11-08 2017-03-29 佛山市飞时达新材料科技有限公司 一种氟嘧菌酯半抗原的制备方法及其应用
EP3372079A1 (de) 2017-03-06 2018-09-12 Bayer CropScience Aktiengesellschaft Neue emulsionskonzentrate auf basis von agrochemischen wirkstoffen
BR112020024762A2 (pt) 2018-06-06 2021-03-23 Arena Pharmaceuticals, Inc. métodos de tratamento de condições relacionadas ao receptor s1p1
US12024492B2 (en) 2019-04-18 2024-07-02 Upl Ltd Process for preparation of azoxystrobin and intermediates thereof
WO2020212928A1 (en) * 2019-04-18 2020-10-22 Upl Limited Process for the preparation of fungicidally active strobilurin compounds and intermediates thereof

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8903019D0 (en) * 1989-02-10 1989-03-30 Ici Plc Fungicides
JPH02233602A (ja) 1989-03-08 1990-09-17 Hokko Chem Ind Co Ltd 除草剤
JP3188286B2 (ja) 1991-08-20 2001-07-16 塩野義製薬株式会社 フェニルメトキシイミノ化合物およびそれを用いる農業用殺菌剤
GB9307247D0 (en) 1993-04-07 1993-06-02 Zeneca Ltd Fungicidal compounds
DE4408005A1 (de) * 1993-08-11 1995-02-16 Bayer Ag Substituierte Azadioxacycloalkene
ZW8594A1 (en) * 1993-08-11 1994-10-12 Bayer Ag Substituted azadioxacycbalkenes
DE19501842A1 (de) * 1995-01-23 1996-07-25 Bayer Ag Substituierte Arylazadioxacycloalkene
DE19526047C1 (de) 1995-07-17 1997-03-06 Hoechst Ag Verfahren zur Herstellung sekundärer Arylphosphane

Also Published As

Publication number Publication date
IN187520B (Direct) 2002-05-11
IL124974A (en) 2001-04-30
FR06C0042I2 (Direct) 2009-10-30
ID15839A (id) 1997-08-14
EP0882043B1 (de) 2002-09-04
NZ325869A (en) 1999-03-29
US6407233B1 (en) 2002-06-18
ATE223407T1 (de) 2002-09-15
WO1997027189A1 (de) 1997-07-31
CA2243591C (en) 2004-07-27
DE19602095A1 (de) 1997-07-24
JP2000504321A (ja) 2000-04-11
IL124974A0 (en) 1999-01-26
HUP9900582A2 (hu) 1999-06-28
BR9707160A (pt) 1999-04-06
CN1347878A (zh) 2002-05-08
CL2004001128A1 (es) 2005-04-01
PL187756B1 (pl) 2004-10-29
BG102622A (en) 1999-04-30
SK98998A3 (en) 1998-12-02
ES2180021T3 (es) 2003-02-01
CN1146550C (zh) 2004-04-21
MX9805742A (Direct) 1999-01-31
CA2243591A1 (en) 1997-07-31
FR06C0042I1 (Direct) 2007-01-12
IN187450B (Direct) 2002-04-27
EP0882043A1 (de) 1998-12-09
PL327924A1 (en) 1999-01-04
DK0882043T3 (da) 2003-01-06
SK283815B6 (sk) 2004-02-03
CN1213037C (zh) 2005-08-03
HK1017354A1 (en) 1999-11-19
CN1209808A (zh) 1999-03-03
CZ231098A3 (cs) 1998-10-14
HU227488B1 (en) 2011-07-28
CO4770925A1 (es) 1999-04-30
AU1312197A (en) 1997-08-20
BG64178B1 (bg) 2004-03-31
KR100383906B1 (ko) 2003-07-23
RU2191186C2 (ru) 2002-10-20
PT882043E (pt) 2003-01-31
AU720066B2 (en) 2000-05-25
HUP9900582A3 (en) 2000-02-28
TR199801392T2 (xx) 1998-10-21
CN1072223C (zh) 2001-10-03
KR19990076939A (ko) 1999-10-25
US6103717A (en) 2000-08-15
HK1045310A1 (zh) 2002-11-22
MX203302B (Direct) 2001-07-26
CZ295548B6 (cs) 2005-08-17
CN1495175A (zh) 2004-05-12
UA56156C2 (uk) 2003-05-15
DE59708129D1 (de) 2002-10-10
ZA97478B (en) 1997-07-30
NL350025I1 (nl) 2006-03-01
JP3262277B2 (ja) 2002-03-04

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