Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/33—Heterocyclic compounds
  • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
  • A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
  • A61K31/505—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
  • A61K31/506—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim not condensed and containing further heterocyclic rings
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P1/00—Drugs for disorders of the alimentary tract or the digestive system
  • A61P1/18—Drugs for disorders of the alimentary tract or the digestive system for pancreatic disorders, e.g. pancreatic enzymes
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P13/00—Drugs for disorders of the urinary system
  • A61P13/12—Drugs for disorders of the urinary system of the kidneys
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
  • A61P31/04—Antibacterial agents
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P35/00—Antineoplastic agents
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P35/00—Antineoplastic agents
  • A61P35/02—Antineoplastic agents specific for leukemia
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P35/00—Antineoplastic agents
  • A61P35/04—Antineoplastic agents specific for metastasis
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P9/00—Drugs for disorders of the cardiovascular system
  • A61P9/10—Drugs for disorders of the cardiovascular system for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D405/00—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
  • C07D405/02—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
  • C07D405/04—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings directly linked by a ring-member-to-ring-member bond

Definitions

• the present invention relates to a fluorine-containing pyrimidine compound and a method for producing the same.
• fluorine-containing pyrimidine compounds have various biological activities.
• compounds having a furan ring structure at the 2-position of the pyrimidine ring are expected to be used in the fields of pharmaceuticals and agrochemicals.
• Non-Patent Document 1 reports that a compound having a 2- (2-furanyl) -pyrimidine structure has antibacterial activity
• Non-Patent Document 2 reports 2- (2-Franyl).
• -Compounds with a pyrimidine structure have been reported to be effective in the treatment of heart failure and renal failure.
• Non-Patent Document 3 states that a compound having a 2- (2-furanyl) -pyrimidine structure is effective in suppressing the progression of acute myeloid leukemia and suppressing tumor metastasis
• Non-Patent Document 4 states 2- (2). It has been reported that compounds having a-furanyl) -pyrimidine structure have antitumor activity.
• Non-Patent Documents 5 and 6 and Patent Document 1 report that a compound having a 2- (3-furanyl) -pyrimidine structure has antitumor activity, and Patent Document 2 reports 2- (3-furanyl)-. Compounds with a pyrimidine structure have been reported to be effective in the treatment of pancreatitis.
• Non-Patent Document 7 is a synthetic method using trifluoroiodomethane
• Non-Patent Document 8 is a synthetic method using trifluoroacetic acid
• Non-Patent Document 9 is 5- (trifluoromethyl).
• a synthetic method using a dibenzothiophenium salt (Umemoto's reagent) has been reported.
• Non-Patent Document 10 is a synthetic method using a trifluoromethanesulfonic acid derivative
• Patent Document 3 is a synthetic method using sodium trifluoromethanesulfinate (Langlois reagent)
• Patent Document 4 is (trifluoromethyl) trimethyl.
• a synthetic method using silane (Ruppert reagent) has been reported.
• the present inventors have discovered that a furan ring structure can be introduced at the 2-position between two nitrogen atoms on the pyrimidine ring by reacting a specific raw material, and have completed the present invention.
• the present invention is a novel fluorine-containing pyrimidine compound having a substituent at the 4-position, 5-position, and 6-position and a furan ring structure as a substituent at the 2-position, which has not been known conventionally, and It provides a production method capable of easily producing the fluorine-containing pyrimidine compound.
• the gist structure of the present invention is as follows.
• R represents a hydrocarbon group having 1 to 12 carbon atoms.
• X and Y are each independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 10 carbon atoms, -C n F 2n + 1 (where n is an integer of 1-10), a nitro group, a boronic acid group, - OA 1, -SO m a 1 (m is an integer of 0 ⁇ 3), - NA 1 a 2, -COOA 1, or-ConA 1 a 2 represents, a 1, a 2 are each independently Represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms.
• R is an alkyl group having 1 to 10 carbon atoms.
• X and Y are each independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 10 carbon atoms, -C n F 2n + 1 (where n is an integer of 1-10), a nitro group, a boronic acid group, - OA 1, -SO m a 1 (m is an integer of 0 ⁇ 3), - NA 1 a 2, -COOA 1, or-ConA 1 a 2 represents, a 1, a 2 are each independently Represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms. ) A method for producing a fluorine-containing pyrimidine compound.
• X and Y are each independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 10 carbon atoms, -C n F 2n + 1 (where n is an integer of 1-10), a nitro group, a boronic acid group, - OA 1, -SO m a 1 (m is an integer of 0 ⁇ 3), - NA 1 a 2, represents -COOA 1 or -CONA 1 a 2,, Z represents a halogen atom, -OA 1 , -SO m A 1 (m is an integer of 0 to 3), or -NA 1 A 2 .
• a 1 and A 2 independently represent a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms.
• a method for producing a fluorine-containing pyrimidine compound [5] The method for producing a fluorine-containing pyrimidine compound according to the above [3] or [4], wherein R is an alkyl group having 1 to 10 carbon atoms.
• a novel fluorine-containing pyrimidine compound having a substituent at the 4-position, 5-position, and 6-position and having a furan ring structure as a substituent at the 2-position, and the fluorine-containing pyrimidine compound can be easily produced.
• a possible manufacturing method can be provided.
• fluorine-containing pyrimidine compound The fluorine-containing pyrimidine compound of one embodiment is represented by the following general formula (1) or (2).
• R represents a hydrocarbon group having 1 to 12 carbon atoms.
• X and Y are each independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 10 carbon atoms, -C n F 2n + 1 (where n is an integer of 1-10), a nitro group, a boronic acid group, - OA 1, -SO m a 1 (m is an integer of 0 ⁇ 3), - NA 1 a 2, -COOA 1, or-ConA 1 a 2 represents, a 1, a 2 are each independently Represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms. ).
• a monocyclic frill group may be present as a substituent at the 2-position of the pyrimidine ring, or a condensed heterocyclic group containing a furan ring as a part may be present.
• R is not particularly limited as long as it is a hydrocarbon group having 1 to 12 carbon atoms and is composed of a carbon atom and a hydrogen atom, and examples thereof include a chain hydrocarbon group, an aromatic hydrocarbon group, and an alicyclic hydrocarbon group. it can.
• the chain hydrocarbon group is not particularly limited as long as the total number of carbon atoms is 1 to 12, and may be a branched chain hydrocarbon group or a non-branched chain hydrocarbon group.
• the aromatic hydrocarbon group is not particularly limited as long as the total number of carbon atoms is 5 to 12, and even if it is an aromatic hydrocarbon group having a substituent, it is an aromatic hydrocarbon group having no substituent. May be good.
• the aromatic hydrocarbon group may have a condensed polycyclic structure.
• the alicyclic hydrocarbon group is not particularly limited as long as the total number of carbon atoms is 3 to 12, and even an alicyclic hydrocarbon group having a substituent does not have a substituent. It may be. Further, the alicyclic hydrocarbon group may have a bridging ring structure.
• chain hydrocarbon group examples include methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, i-butyl group, sec-butyl group, t-butyl group, pentyl group and hexyl group.
• Alkyl groups such as heptyl group, octyl group, nonyl group, decyl group, undecyl group, dodecyl group; Alkenyl groups such as ethenyl group, propenyl group, butenyl group, pentenyl group, hexenyl group, heptenyl group, octenyl group, nonenyl group, decenyl group, undecenyl group, dodecenyl group; Examples thereof include alkynyl groups such as ethynyl group, propynyl group, butynyl group, pentynyl group, hexynyl group, heptynyl group, octynyl group, nonynyl group, decynyl group, undecynyl group and dodecynyl group.
• aromatic hydrocarbon group examples include a phenyl group and a naphthyl group.
• Examples of the alicyclic hydrocarbon group include a saturated or unsaturated cyclic hydrocarbon group, and examples of the cyclic hydrocarbon group include a cyclopropyl group, a cyclobutyl group, a cyclohexyl group, a cyclopentyl group, an adamantyl group, and a norbornyl group.
• the groups can be mentioned.
• R is an alkyl group having 1 to 10 carbon atoms. Since R is an alkyl group having 1 to 10 carbon atoms, the fluoroisobutylene derivative of the general formula (3) and the fluoroisobutane derivative of the general formula (6), which are raw materials for the fluorine-containing pyrimidine compound, can be easily prepared. it can.
• halogen atom X and Y examples include F, Cl, Br and I.
• X, -OA 1 is Y
• a hydrocarbon group of -SO m A 1 (m is 0 to 3 is an integer)
• a 1 is a hydrogen atom or a C 1-10 contained.
• a 1 and A 2 contained in -NA 1 A 2 which are X and Y independently represent a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms.
• a 1 and A 2 represent a hydrocarbon group having 1 to 10 carbon atoms, for example, it can be a hydrocarbon group having 1 to 10 carbon atoms in the above R.
• -SO m A 1 may be a methanesulfonyl group.
• a 1 contained in ⁇ COOA 1 which is X and Y is a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms.
• the hydrocarbon group having 1 to 10 carbon atoms in the above R may be used. it can.
• -COOA 1 can be a methoxycarbonyl group.
• a 1 and A 2 contained in -CONA 1 A 2 which are X and Y independently represent a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms.
• a 1 and A 2 represent a hydrocarbon group having 1 to 10 carbon atoms, for example, it can be a hydrocarbon group having 1 to 10 carbon atoms in the above R. It is preferable that X and Y are hydrogen atoms.
• the fluorine-containing pyrimidine compound of one embodiment has a specific substituent (a fused heterocyclic group containing a frill group or a furan ring as a part) at the 2-position of the pyrimidine ring, and the 4-position, 5-position, and 6-position above the pyrimidine ring. Since it has a specific substituent (-OR, -CF 3 , -F), it can have an excellent effect from the viewpoint of structural expandability. In particular, desired biological activity (for example, inhibitory activity of hormones and enzymes, bactericidal activity, insecticidal activity, herbicidal activity) can be expected.
• desired biological activity for example, inhibitory activity of hormones and enzymes, bactericidal activity, insecticidal activity, herbicidal activity
• the furan ring structure located on the 2-position of the pyrimidine ring exists as a 2-furan group, a 3-furan group, or a condensed heterocyclic group partially containing a furan ring, and the furan ring structure further has a substituent. It may or may not have.
• the furan ring structure having a substituent can impart additional properties to the fluorine-containing pyrimidine compound of one embodiment. Further, since the substituents on the 4- and 6-positions of the pyrimidine ring are different groups (-OR and -F), they can be easily derivatized into an asymmetric structure, and their use as an intermediate is also expected. be able to.
• a derivative can be obtained by modifying -OR by reacting a fluorine-containing pyrimidine compound under acidic conditions. Further, by reacting the fluorine-containing pyrimidine compound under basic conditions, -F can be modified to obtain a derivative.
• the fluorine-containing pyrimidine compound of one embodiment is useful in the field of electronic materials such as organic semiconductors and liquid crystals.
• the method for producing the fluorine-containing pyrimidine compound of one embodiment is (A) By reacting the fluoroisobutylene derivative represented by the following general formula (3) with the compound represented by the following general formula (4) or a salt thereof, the inclusion represented by the following general formula (1) is included. The process of obtaining a fluoropyrimidine compound, or (B) By reacting the fluoroisobutylene derivative represented by the following general formula (3) with the compound represented by the following general formula (5) or a salt thereof, the inclusion represented by the following general formula (2) is included.
• R represents a hydrocarbon group having 1 to 12 carbon atoms.
• X and Y are each independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 10 carbon atoms, -C n F 2n + 1 (where n is an integer of 1-10), a nitro group, a boronic acid group, - OA 1, -SO m a 1 (m is an integer of 0 ⁇ 3), - NA 1 a 2, -COOA 1, or-ConA 1 a 2 represents, a 1, a 2 are each independently Represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms. ) Have.
• R in the above general formulas (1) to (3) preferably represents an alkyl group having 1 to 10 carbon atoms.
• R in the above general formulas (1) to (3) preferably represents an alkyl group having 1 to 10 carbon atoms.
• X and Y when X and Y are adjacent to each other, X and Y are adjacent to each other as described above. They may be bonded to form a ring together with the carbon atoms to which they are bonded.
• reaction formula (A) The reaction of the above (a) between the fluoroisobutylene derivative represented by the general formula (3) and the compound represented by the general formula (4) is represented by the following reaction formula (A).
• reaction formula (B) The reaction of the above (b) between the fluoroisobutylene derivative represented by the general formula (3) and the compound represented by the general formula (5) is represented by the following reaction formula (B).
• the compounds of the general formulas (4) and (5) may be in the form of salts, respectively.
• the counterion is not particularly limited as long as it is a monovalent anion, and examples thereof include halide ions such as F ⁇ , Cl ⁇ , Br ⁇ , and I ⁇ .
• the above reactions (a) and (b) can be carried out in one step in the presence of a hydrogen halide scavenger. Therefore, the fluorine-containing pyrimidine compounds of the above general formulas (1) and (2) can be easily obtained.
• a cyclic pyrimidine structure is formed between the fluoroisobutylene derivative and the amidino group of the compounds of the general formulas (4) and (5).
• a group derived from the furan ring structure of the compounds of the general formulas (4) and (5) is located at the 2-position of the pyrimidine structure.
• -OR, CF 3 , and F derived from the fluoroisobutylene derivative are located at the 4-position, 5-position, and 6-position of the pyrimidine structure, respectively.
• the hydrogen halide trapping agent is derived from the hydrogen atom derived from the amidino group in the compounds of the general formulas (4) and (5) in the reaction formulas (A) and (B) above, and the fluoroisobutylene derivative of (3). It is a substance having a function of capturing hydrogen fluoride (HF) formed from fluorine atoms.
• Hydrogen halide trapping agents include sodium hydroxide, potassium hydroxide, calcium hydroxide, sodium carbonate, potassium carbonate, sodium fluoride, potassium fluoride, pyridine, triethylamine, diisopropylethylamine, diazabicyclononen, and diazabicycloun. Organic nitrogen derivatives such as decene, methyltriazabicyclodecene, and diazabicyclooctane can be used.
• the reaction temperature during the reaction of (a) and (b) is preferably 0 to 80 ° C, more preferably 5 to 50 ° C, and even more preferably 10 to 25 ° C.
• the reaction time during the reactions of (a) and (b) is preferably 8 to 72 hours, more preferably 12 to 48 hours, and even more preferably 16 to 36 hours.
• Examples of the solvent used in the above reactions (a) and (b) include tetrahydrofuran, monoglime, jigglime, triglime, tetraglime, acetonitrile, dimethylformamide, dimethylacetamide, methylpyrrolidone, dimethylethyleneurea, tetramethylurea, dimethylsulfoxide, and the like.
• Examples thereof include an aprotic polar solvent such as sulfoxide, or a two-phase solvent obtained by a protic polar solvent such as water and a water-insoluble solvent such as dichloromethane, toluene and diethyl ether.
• quaternary ammonium halides such as benzyltriethylammonium chloride, quaternary phosphonium halides, crown ethers and the like can be used.
• the method for producing the fluorine-containing pyrimidine compound of another embodiment is (C) By reacting the fluoroisobutane derivative represented by the following general formula (6) with the compound represented by the following general formula (4) or a salt thereof, the inclusion represented by the following general formula (1) is included.
• R represents a hydrocarbon group having 1 to 12 carbon atoms.
• X and Y are each independently a hydrogen atom, a halogen atom, a hydrocarbon group having 1 to 10 carbon atoms, -C n F 2n + 1 (where n is an integer of 1-10), a nitro group, a boronic acid group, - OA 1, -SO m a 1 (m is an integer of 0 ⁇ 3), - NA 1 a 2, represents -COOA 1 or -CONA 1 a 2,, Z represents a halogen atom, -OA 1 , -SO m A 1 (m is an integer of 0 to 3), or -NA 1 A 2 .
• a 1 and A 2 independently represent a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms. ) Have.
• R in the above general formulas (1), (2) and (6) preferably represents an alkyl group having 1 to 10 carbon atoms. Further, in the general formulas (1), (2), (4) and (5) of the steps (c) and (d), when X and Y are adjacent to each other, X and Y are adjacent to each other as described above. They may be bonded to form a ring together with the carbon atoms to which they are bonded.
• reaction formula (C) The reaction of the above-mentioned (c) between the fluoroisobutane derivative represented by the general formula (6) and the compound represented by the general formula (4) is represented by the following reaction formula (C).
• reaction formula (D) The reaction of the above (d) between the fluoroisobutane derivative represented by the general formula (6) and the compound represented by the general formula (5) is represented by the following reaction formula (D).
• the compounds of the general formulas (4) and (5) may be in the form of salts, respectively.
• the counterion is not particularly limited as long as it is a monovalent anion, and examples thereof include halide ions such as F ⁇ , Cl ⁇ , Br ⁇ , and I ⁇ .
• the above reactions (C) and (D) can be carried out in one step. Therefore, the fluorine-containing pyrimidine compounds of the above general formulas (1) and (2) can be easily obtained.
• a cyclic pyrimidine structure is formed between the fluoroisobutane derivative and the amidino group of the compounds of the general formulas (4) and (5).
• a group derived from the furan ring structure of the compounds of the general formulas (4) and (5) is located.
• -OR, CF 3 , and F derived from the fluoroisobutane derivative are located at the 4-position, 5-position, and 6-position of the pyrimidine structure, respectively.
• the reaction temperature during the reaction of (c) and (d) is preferably 0 to 80 ° C, more preferably 5 to 50 ° C, and even more preferably 10 to 25 ° C.
• the reaction time during the reaction of (c) and (d) is preferably 8 to 72 hours, more preferably 12 to 48 hours, and even more preferably 16 to 36 hours.
• the same hydrogen halide scavengers as those of the above (a) and (b) can be used.
• Examples of the solvent used in the above reactions (c) and (d) include tetrahydrofuran, monoglime, jigglime, triglime, tetraglime, acetonitrile, dimethylformamide, dimethylacetamide, methylpyrrolidone, dimethylethyleneurea, tetramethylurea, dimethylsulfoxide, and the like.
• Examples thereof include an aprotic polar solvent such as sulfoxide, or a two-phase solvent obtained by a protic polar solvent such as water and a water-insoluble solvent such as dichloromethane, toluene and diethyl ether.
• quaternary ammonium halides such as benzyltriethylammonium chloride, quaternary phosphonium halides, crown ethers and the like can be used.
• Example 1 Production of 6-fluoro-4-methoxy-2- (2-furanyl) -5-trifluoromethylpyrimidine Under ice-water cooling, 75 g of dichloromethane, 75 g of water and 25 g (0.15 mol) of 2-amidinofuran hydrochloride, 1,3 , 3,3-Tetrafluoro-1-methoxy-2-trifluoromethyl-1-propen (25 g (0.12 mol)) was added. Subsequently, 120 ml (0.60 mol) of a 5N aqueous sodium hydroxide solution (hydrogen halide scavenger) was added dropwise so that the internal temperature did not exceed 10 ° C., and the temperature was raised to room temperature.
• a 5N aqueous sodium hydroxide solution hydroogen halide scavenger
• Example 2 Production of 6-fluoro-4-methoxy-2- (3-furanyl) -5-trifluoromethylpyrimidine Under ice-water cooling, 75 g of dichloromethane, 75 g of water and 10 g (61 mmol) of 3-amidinofuran hydrochloride, 1,3,3 , 3-Tetrafluoro-1-methoxy-2-trifluoromethyl-1-propen (11 g (55 mmol)) was added. Subsequently, 48 ml (0.24 mol) of a 5N aqueous sodium hydroxide solution (hydrogen halide scavenger) was added dropwise so that the internal temperature did not exceed 10 ° C., and the temperature was raised to room temperature.
• a 5N aqueous sodium hydroxide solution hydroogen halide scavenger
• Example 3 Instead of 1,3,3,3-tetrafluoro-1-methoxy-2-trifluoromethyl-1-propen of Example 1, 1,1,1,3,3-pentafluoro-3-methoxy-2 Production of 6-Fluoro-4-methoxy-2- (2-Franyl) -5-Trifluoromethylpyrimidine using -trifluoromethyl-propane 2-Amidinofuran hydrochloride in 75 g of dichloromethane and 75 g of water under ice-water cooling 25 g (0.15 mol) and 28 g (0.12 mol) of 1,1,1,3,3-pentafluoro-3-methoxy-2-trifluoromethyl-propane were added.
• Example 4 Instead of 1,3,3,3-tetrafluoro-1-methoxy-2-trifluoromethyl-1-propene of Example 2, 1,1,1,3,3-pentafluoro-3-methoxy-2 Production of 6-Fluoro-4-methoxy-2- (3-Franyl) -5-Trifluoromethylpyrimidine using -trifluoromethyl-propane 3-amidinofuran hydrochloride in 75 g of dichloromethane and 75 g of water under ice-water cooling 10 g (61 mmol) and 13 g (55 mmol) of 1,1,1,3,3-pentafluoro-3-methoxy-2-trifluoromethyl-propane were added.
• Example 7 Production of 6-Fluoro-4-methoxy-2- (2-methyl-3-furanyl) -5-trifluoromethylpyrimidine 2-Methylfuran-3-carboxyimideamide hydrochloride 0.3 g (1.8 mmol) in acetonitrile An acetonitrile solution was prepared by dissolving in 18 ml. 0.4 g (1.9 mmol) of 1,3,3,3-tetrafluoro-1-methoxy-2-trifluoromethyl-1-propen and 1.2 g of N, N-diisopropylethylamine (9. 3 mmol) was added, and the mixture was stirred at room temperature for 23.7 hours.

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