WO2015110493A1 - Method for preparing 1-alkyl-3-difluoromethyl-5-fluor-1h-pyrazole-4-carbaldehydes and 1-alkyl-3-difluoromethyl-5-fluor-1h-pyrazole-4-carboxylates - Google Patents
Method for preparing 1-alkyl-3-difluoromethyl-5-fluor-1h-pyrazole-4-carbaldehydes and 1-alkyl-3-difluoromethyl-5-fluor-1h-pyrazole-4-carboxylates Download PDFInfo
- Publication number
- WO2015110493A1 WO2015110493A1 PCT/EP2015/051184 EP2015051184W WO2015110493A1 WO 2015110493 A1 WO2015110493 A1 WO 2015110493A1 EP 2015051184 W EP2015051184 W EP 2015051184W WO 2015110493 A1 WO2015110493 A1 WO 2015110493A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- alkyl
- pyrazole
- difluoromethyl
- carbaldehydes
- fluor
- Prior art date
Links
- 0 *C(c(c(*)n[n]1*)c1F)=O Chemical compound *C(c(c(*)n[n]1*)c1F)=O 0.000 description 2
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D231/00—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings
- C07D231/02—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings
- C07D231/10—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D231/14—Heterocyclic compounds containing 1,2-diazole or hydrogenated 1,2-diazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members 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
- C07D231/16—Halogen atoms or nitro radicals
-
- 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
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
- A01N43/56—1,2-Diazoles; Hydrogenated 1,2-diazoles
Definitions
- the present invention relates to a novel method for preparing l-alkyl-3-difluoromethyl -5-fluor-lH- pyrazole-4-carbaldehydes or esters thereof of formula (I) by means of reductive dehalogenation, starting from l-alkyl-3-chlorodifluoromethyl-5-fluoro-lH-pyrazole-4-carbaldehydes or esters thereof of formula (II)
- R is Ci-C6-alkyl and R is H or Ci-C6-alkoxy.
- l-Alkyl-3-haloalkyl-5-fluoropyrazolecarbaldehydes and esters thereof are important building blocks for preparing plant protection active ingredients, particularly SDHI fungicides.
- l-Alkyl-3-difluoromethyl-5-fluor-lH-pyrazole-4-carbaldehydes was so far typically prepared in a multi-stage transformation starting from difluoromethylacetoacetate (WO 2011061205) :
- WO 2013/171134 shows the reductive elimination of the halogen atom in position 5 of 5-chloro-l-alkyl-3-difluormethylcarbaldehyde
- WO 2004/063165 describes the removal of a chlorine atom in N-aryl-3-methyl-5-chloropyrazole- carbaldehydes.
- R is Ci-C6-alkyl and R is H or Ci-C6-alkoxy
- the radical R 1 is preferably methyl, ethyl, n-propyl, isopropyl, butyl, pentyl, particularly preferably methyl or ethyl, even more preferably methyl.
- the reaction is carried out in the presence of hydrogen. It is possible to use either pure hydrogen or mixtures of hydrogen and an inert gas (up to 1 : 1), such as nitrogen or argon.
- the reaction is carried out at pressures of 1 bar to 50 bar, preferably 1 bar to 20 bar and particularly preferably 2 bar to 15 bar.
- a base is optionally added.
- an inorganic base such as sodium carbonate, potassium carbonate, sodium bicarbonate, potassium bicarbonate, mono-, di- or trisodium phosphate or tripotassium phosphate, sodium hydroxide or potassium hydroxide or an organic base such as triethylamine, tributylamine, diazabicycloun- decene (DBU), diazabicyclononene (DBN), pyridine, lutidine, 2-, 3- or 4-picoline or diazabicyclooc- tane (DABCO) can be used.
- DBU diazabicycloun- decene
- DBN diazabicyclononene
- pyridine lutidine, 2-, 3- or 4-picoline or diazabicyclooc- tane
- DABCO diazabicyclooc- tane
- any hydrogena- tion catalyst may be used as catalyst.
- Suitable catalysts include optionally one or more metals from groups 8 - 10 of the periodic table on any conventional inorganic support. Examples include noble metal catalysts, such as ruthenium catalysts, palladium catalysts, platinum catalysts and rhodium catalysts, Raney nickel catalysts and Raney cobalt and Lindlar catalysts.
- noble metal catalysts such as ruthenium catalysts, palladium catalysts, platinum catalysts and rhodium catalysts, Raney nickel catalysts and Raney cobalt and Lindlar catalysts.
- hydrogenations over homogeneous catalysts can, however, also be carried out, for example over the Wilkinson catalyst.
- the relevant catalysts may be used in supported form, for example on carbon (charcoal or activated charcoal), aluminium oxide, silicon dioxide, zirconium dioxide, calcium carbonate or titanium dioxide. Catalysts of this kind are known per se to those skilled in the art. Particularly preferred are palladium catalysts supported on calcium carbonate.
- the catalysts may be used either in water-moist or in dried form.
- the catalyst used is preferably reused for a plurality of conversions.
- the catalyst is used at a concentration of approximately 0.01 to approximately 30% by weight, based on the halo-l-alkyl-3-fluoroalkyl-lH- pyrazole-4-carbaldehyde of the formula (II) used.
- the catalyst is preferably used at a concentration of approximately 0.1 to approximately 5% by weight.
- the reduction is advantageously carried out in the presence of at least of one additive.
- Typical additives are, NELtOAc, Sodium Acetate, MgF2, NH 4 F, AIF 3 , K2CO3, Borax.
- the reaction time may be up to 20 hours, depending on the reactivity of the reactants, while the reac- tion can also be terminated earlier when conversion is complete. Preference is given to reaction times of 3-10 hours.
- the reaction is carried out in the presence of a solvent.
- Suitable solvents are: alcohols, ethyl acetate, isopropyl acetate, THF, methyltetrahydrofuran, dioxane, toluene, hexane, heptane, pentane or petroleum ether. Particular preference is given to the use of methanol, ethanol, DMSO, dimethylacetamide, DMF or NMP.
- 5-Fluoro-l-alkyl-3-chlorodifluoroalkyl-lH-pyrazole-4-carbaldehydes of the formula (Ila) can be prepared by known methods (cf. /. Het. Chem. 1990, 27, 243, WO 2006/018725 Al, WO 2011/061205 Al, B. Hamper et al. Journal of Organic Chemistry V.57,N21,5680-6, WO 2011061205, WO2013171134 and WO2011131615).
- R 1 and R 3 are independently Cl-C6-alkyl.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Pest Control & Pesticides (AREA)
- Plant Pathology (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Plural Heterocyclic Compounds (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Catalysts (AREA)
Abstract
Description
Claims
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016547519A JP6462703B2 (en) | 2014-01-24 | 2015-01-22 | Process for preparing 1-alkyl-3-difluoromethyl-5-fluoro-1H-pyrazole-4-carbaldehydes and 1-alkyl-3-difluoromethyl-5-fluoro-1H-pyrazole-4-carboxylates |
DK15700749.3T DK3097081T3 (en) | 2014-01-24 | 2015-01-22 | PROCEDURE FOR PREPARING 1-ALKYL-3-DIFLUORMETHYL-5-FLUOR-1H-PYRAZOL-4-CARBALDEHYDER AND 1-ALKYL-3-DIFLUORMETHYL-5-FLUOR-1H-PYRAZYL-4-CARBOXYL |
BR112016016397-4A BR112016016397B1 (en) | 2014-01-24 | 2015-01-22 | PROCESS TO PREPARE 1-ALKYL-3-DIFLUOROMETHYL-5-FLUORO-1H-PYRAZOL-4-CARBALDEHYDES OR ITS ESTERS |
KR1020167023073A KR102319577B1 (en) | 2014-01-24 | 2015-01-22 | Method for preparing 1-alkyl-3-difluoromethyl-5-fluor-1h-pyrazole-4-carbaldehydes and 1-alkyl-3-difluoromethyl-5-fluor-1h-pyrazole-4-carboxylates |
CN201580005766.1A CN105934430B (en) | 2014-01-24 | 2015-01-22 | The method for preparing the formaldehyde of 1 alkyl, 3 difluoromethyl, 5 fluorine 1H pyrazoles 4 and the formic acid esters of 1 alkyl, 3 difluoromethyl, 5 fluorine 1H pyrazoles 4 |
MX2016009325A MX361770B (en) | 2014-01-24 | 2015-01-22 | Method for preparing 1-alkyl-3-difluoromethyl-5-fluor-1h-pyrazole -4-carbaldehydes and 1-alkyl-3-difluoromethyl-5-fluor-1h-pyrazole -4-carboxylates. |
ES15700749.3T ES2657424T3 (en) | 2014-01-24 | 2015-01-22 | Preparation procedure for 1-alkyl-3-difluoromethyl-5-fluor-1H-pyrazol-4-carbaldehydes and 1-alkyl-3-difluoromethyl-5-fluorine-1H-pyrazole-4-carboxylates |
US15/113,377 US9656966B2 (en) | 2014-01-24 | 2015-01-22 | Method for preparing 1-alkyl-3-difluoromethyl-5-fluor-1H-pyrazole-4-carbaldehydes and 1-alkyl-3-difluoromethyl-5-fluor-1H-pyrazole-4-carboxylates |
EP15700749.3A EP3097081B1 (en) | 2014-01-24 | 2015-01-22 | Method for preparing 1-alkyl-3-difluoromethyl-5-fluor-1h-pyrazole-4-carbaldehydes and 1-alkyl-3-difluoromethyl-5-fluor-1h-pyrazole-4-carboxylates |
IL246870A IL246870B (en) | 2014-01-24 | 2016-07-21 | Method for preparing 1-alkyl-3-difluoromethyl-5-fluoro-1h-pyrazole-4-carbaldehydes and 1-alkyl-3-difluoromethyl-5-fluoro-1h-pyrazole-4-carboxylates |
Applications Claiming Priority (2)
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EP14356001.9 | 2014-01-24 | ||
EP14356001 | 2014-01-24 |
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WO2015110493A1 true WO2015110493A1 (en) | 2015-07-30 |
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PCT/EP2015/051184 WO2015110493A1 (en) | 2014-01-24 | 2015-01-22 | Method for preparing 1-alkyl-3-difluoromethyl-5-fluor-1h-pyrazole-4-carbaldehydes and 1-alkyl-3-difluoromethyl-5-fluor-1h-pyrazole-4-carboxylates |
Country Status (12)
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US (1) | US9656966B2 (en) |
EP (1) | EP3097081B1 (en) |
JP (1) | JP6462703B2 (en) |
KR (1) | KR102319577B1 (en) |
CN (1) | CN105934430B (en) |
BR (1) | BR112016016397B1 (en) |
DK (1) | DK3097081T3 (en) |
ES (1) | ES2657424T3 (en) |
IL (1) | IL246870B (en) |
MX (1) | MX361770B (en) |
TW (1) | TWI628168B (en) |
WO (1) | WO2015110493A1 (en) |
Cited By (1)
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WO2022233129A1 (en) | 2021-05-05 | 2022-11-10 | Fujian Yongjing Technology Co., Ltd | New process for the synthesis of 5-fluoro-3- (difuoromethyl) -5-fluoro-1-methyl-1h-pyrazole-4-carboxylic acid derivatives and the free acid thereof |
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CN109694350B (en) * | 2017-10-20 | 2023-05-09 | 中国科学院上海有机化学研究所 | Compound containing fluoromethyl and preparation method thereof |
TWI782599B (en) * | 2020-07-02 | 2022-11-01 | 美商輝瑞股份有限公司 | Aminopyrimidinyl derivatives |
TWI785660B (en) * | 2020-07-02 | 2022-12-01 | 美商輝瑞大藥廠 | Preparation of a pyrimidinyl-3,8-diazabicyclo[3.2.1]octanylmethanone derivative and salt thereof |
Citations (2)
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WO2011061205A1 (en) * | 2009-11-19 | 2011-05-26 | Bayer Cropscience Ag | Method for producing 5-fluorine-1-alkyl-3-fluoralkyl-1h-pyrazol-4 carbolic acid chlorides |
WO2012010692A1 (en) * | 2010-07-23 | 2012-01-26 | Solvay Sa | Process for the preparation of esters of 1-substituted-3-fluoroalkyl-pyrazole-4-carboxylic acids |
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US5658962A (en) * | 1994-05-20 | 1997-08-19 | Minnesota Mining And Manufacturing Company | Omega-hydrofluoroalkyl ethers, precursor carboxylic acids and derivatives thereof, and their preparation and application |
US20060241157A1 (en) * | 2003-01-06 | 2006-10-26 | Conner Scott E | Heterocyclic ppar modulators |
GEP20115305B (en) | 2004-08-18 | 2011-10-10 | Pfizer | Inhibitors of hepatitis c virus rna-dependent rna polymerase, compositions containing them and using the same for treatment |
GB0428137D0 (en) * | 2004-12-22 | 2005-01-26 | Syngenta Participations Ag | Novel herbicides |
DE102005009457A1 (en) * | 2005-03-02 | 2006-09-07 | Bayer Cropscience Ag | Process for the preparation of alkylanilides |
EP1721899A1 (en) * | 2005-05-13 | 2006-11-15 | Bayer CropScience S.A. | Process for the preparation of a carboxamide derivative |
US20100035756A1 (en) * | 2006-07-12 | 2010-02-11 | Syngenta Limited | Triazolophyridine derivatives as herbicides |
GB0813436D0 (en) * | 2008-07-22 | 2008-08-27 | Syngenta Participations Ag | Insecticidal compounds |
AR076839A1 (en) * | 2009-05-15 | 2011-07-13 | Bayer Cropscience Ag | FUNGICIDE DERIVATIVES OF PIRAZOL CARBOXAMIDAS |
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WO2011061205A1 (en) * | 2009-11-19 | 2011-05-26 | Bayer Cropscience Ag | Method for producing 5-fluorine-1-alkyl-3-fluoralkyl-1h-pyrazol-4 carbolic acid chlorides |
WO2012010692A1 (en) * | 2010-07-23 | 2012-01-26 | Solvay Sa | Process for the preparation of esters of 1-substituted-3-fluoroalkyl-pyrazole-4-carboxylic acids |
Cited By (1)
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WO2022233129A1 (en) | 2021-05-05 | 2022-11-10 | Fujian Yongjing Technology Co., Ltd | New process for the synthesis of 5-fluoro-3- (difuoromethyl) -5-fluoro-1-methyl-1h-pyrazole-4-carboxylic acid derivatives and the free acid thereof |
Also Published As
Publication number | Publication date |
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ES2657424T3 (en) | 2018-03-05 |
CN105934430B (en) | 2018-03-16 |
MX2016009325A (en) | 2016-10-13 |
US20170008852A1 (en) | 2017-01-12 |
TWI628168B (en) | 2018-07-01 |
EP3097081B1 (en) | 2018-01-10 |
KR20160111506A (en) | 2016-09-26 |
EP3097081A1 (en) | 2016-11-30 |
CN105934430A (en) | 2016-09-07 |
BR112016016397A2 (en) | 2018-12-26 |
TW201615625A (en) | 2016-05-01 |
US9656966B2 (en) | 2017-05-23 |
JP2017506219A (en) | 2017-03-02 |
BR112016016397B1 (en) | 2021-06-29 |
KR102319577B1 (en) | 2021-10-29 |
DK3097081T3 (en) | 2018-01-29 |
JP6462703B2 (en) | 2019-01-30 |
MX361770B (en) | 2018-12-17 |
IL246870B (en) | 2018-03-29 |
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