WO2013187327A1 - 1h-テトラゾール誘導体の製造方法 - Google Patents
1h-テトラゾール誘導体の製造方法 Download PDFInfo
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- WO2013187327A1 WO2013187327A1 PCT/JP2013/065848 JP2013065848W WO2013187327A1 WO 2013187327 A1 WO2013187327 A1 WO 2013187327A1 JP 2013065848 W JP2013065848 W JP 2013065848W WO 2013187327 A1 WO2013187327 A1 WO 2013187327A1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D257/00—Heterocyclic compounds containing rings having four nitrogen atoms as the only ring hetero atoms
- C07D257/02—Heterocyclic compounds containing rings having four nitrogen atoms as the only ring hetero atoms not condensed with other rings
- C07D257/04—Five-membered rings
Definitions
- the present invention relates to a method for producing a 1H-tetrazole derivative. More particularly, the present invention relates to a method of reacting an azide compound and a cyanide compound in a flow reactor.
- This application claims priority on June 12, 2012 based on Japanese Patent Application No. 2012-132911 for which it applied to Japan, and uses the content here.
- Patent Document 1 discloses a tetrazoyl oxime derivative having an excellent medicinal effect on useful plants, and it has been proposed to use it as a plant disease control agent.
- Patent Document 2 discloses that a 1-alkyl-5-benzoyl-1H-tetrazole derivative represented by the following general formula (P) is converted to hydroxylamine.
- P general formula
- a ′ represents a halogen atom, an alkyl group, an alkoxy group, a methanesulfonyl group, a trifluoromethyl group, an aryl group, a cyano group, or a nitro group; n is any one of 0 to 5 Y ′ is an alkyl group which may have a substituent.
- Non-Patent Document 1 discloses that (1-benzyl-1H-tetrazol-5-yl) (phenyl) methanone could be synthesized by reacting benzoyl cyanide and benzyl azide in an autoclave over 60 hours.
- the above method has no problem when the alkyl azide used as a raw material is a group having a relatively long carbon chain such as a benzyl group, but uses a raw material having a low boiling point and high explosive properties such as methyl azide. In some cases, it is very difficult to implement in terms of safety. Furthermore, there is also a problem that a long reaction time is required to obtain a sufficient reaction yield.
- Patent Document 3 reports that 1-methyl-5-tosyl-1H-tetrazole can be synthesized by reacting methyl azide and tosyl cyanide in an explosion-proof sealed autoclave.
- the highly reactive tosyl cyanide is used as a raw material, the desired reaction product is obtained even at a relatively low temperature condition of 80 ° C., and when the less reactive benzoyl cyanide is used. The reaction efficiency is very low.
- Patent Document 4 discloses that a general formula (P ′) (general formula) is obtained by reacting an alkyl isocyanide such as methyl isocyanide and an acid halide such as benzoyl chloride and reacting the reactant with sodium azide.
- P ′ an alkyl isocyanide
- an acid halide such as benzoyl chloride
- Non-Patent Document 2 reports that tetrazole cyclization reaction was performed by reacting benzyl cyanide and sodium azide in a flow reactor.
- the literature does not disclose a reaction using benzoyl cyanide or methyl azide as a raw material.
- An object of the present invention is to provide a method for efficiently and safely producing 1H-tetrazole derivatives using azide compounds and cyanide compounds as raw materials.
- the present inventors reacted the azide compound and the cyanide compound in an industrially safe and efficient manner by using a flow reactor as a reaction vessel, and placed in the 1st and 5th positions.
- the inventors have found that a 1H-tetrazole derivative having a substituent in can be produced, and the present invention has been completed.
- the method for producing the 1H-tetrazole derivative of the present invention is the following [1] to [6].
- Y represents an alkyl group, an aryl group, an arylalkyl group, a silyl group having a substituent, or a silylalkyl group having a substituent).
- An azide compound represented by the following general formula (III) (in the general formula (III), Z is —CO—, —SO 2 —, or —CR a R b — (wherein R a and R b are Each independently represents a hydrogen atom, an alkyl group, or an unsubstituted or substituted aryl group, p represents 0 or 1, q represents 0 or 1, and r represents 0 or 1 R 1 represents an alkyl group or a hydrogen atom when q is 0, an alkylene group or a hydrogen atom when q is 1, and R 2 represents an unsubstituted or substituted aryl group. However, when p is 0, q is 1 and r is 0.
- R 2 is represented by the following general formula (s1) (in the general formula (s1), A represents a halogen atom, an alkyl group, a haloalkyl group, an alkoxy group, a haloalkoxy group, an alkylsulfonyl group, an unsubstituted or substituted group.
- A represents a halogen atom, an alkyl group, a haloalkyl group, an alkoxy group, a haloalkoxy group, an alkylsulfonyl group, an unsubstituted or substituted group.
- n represents an integer of 0 to 5.
- A may be the same or different from each other.
- the method for producing a 1H-tetrazole derivative according to the present invention comprises a 1H-tetrazole derivative having a substituent at the 1-position and 5-position, which is useful as a raw material for synthesizing active ingredients of various drugs including agricultural chemicals, an azide compound and a cyanide compound.
- the reaction since the reaction is carried out in the flow reactor, it can be produced industrially safely and in a short time and with high efficiency despite the use of a highly explosive azide compound.
- the method for producing a 1H-tetrazole derivative of the present invention comprises reacting an azide compound and a cyanide compound in a flow reactor, and the following general formula (I): This is a method for producing the represented 1H-tetrazole derivative.
- Y represents an alkyl group, an aryl group, an arylalkyl group, a silyl group having a substituent, or a silylalkyl group having a substituent.
- Z is —CO—, —SO 2 —, or —CR a R b — (wherein R a and R b are each independently a hydrogen atom, an alkyl group, or unsubstituted or Represents an aryl group having a substituent.), P represents 0 or 1, q represents 0 or 1, r represents 0 or 1, and R 1 represents an alkyl group or Represents a hydrogen atom, represents an alkylene group when q is 1, and R 2 represents an unsubstituted or substituted aryl group, provided that when p is 0, q is 1 and r is 0 In the case of q, q is 1.)
- the azide group of the azide compound represented by the general formula (II) is added to the cyanide group of the cyanide compound represented by the general formula (III) and cyclized.
- the target 1H-tetrazole derivative can be produced safely and in a shorter time. it can.
- Y represents an alkyl group, an unsubstituted or substituted aryl group, an unsubstituted or substituted arylalkyl group, a substituted silyl group, or a substituted silylalkyl. Represents a group.
- the alkyl group may be a linear alkyl group, a branched alkyl group, or a cyclic alkyl group.
- the alkyl group is preferably a linear alkyl group having 1 to 8 carbon atoms, a branched alkyl group having 3 to 8 carbon atoms, or a cyclic alkyl group having 3 to 8 carbon atoms.
- the aryl group having no substituent or a substituent may be monocyclic or polycyclic.
- the polycyclic aryl group as long as at least one ring is an aromatic ring, the remaining ring may be a saturated ring, an unsaturated ring, or an aromatic ring.
- Y in the general formula (II) is an aryl group having a substituent, the substituent is not particularly limited as long as it is chemically acceptable, and specifically, the following (1) to ( 85).
- Y in the general formula (II) is preferably an aryl group having 6 to 10 carbon atoms among aryl groups, such as a phenyl group, a 1-naphthyl group, a 2-naphthyl group, an azulenyl group, an indanyl group, or a tetralinyl group. More preferred is a phenyl group.
- An unsubstituted or substituted arylalkyl group means a group in which at least one hydrogen atom of an alkyl group is substituted with an unsubstituted or substituted aryl group.
- the alkyl group substituted with the aryl group may be a linear alkyl group, a branched alkyl group, or a cyclic alkyl group.
- the alkyl group is preferably a linear alkyl group having 1 to 8 carbon atoms, a branched alkyl group having 3 to 8 carbon atoms, or a cyclic alkyl group having 3 to 8 carbon atoms, and has 1 to 8 carbon atoms.
- the linear alkyl group is more preferable.
- aryl group that serves as a substituent of the alkyl group examples include the same aryl groups as those described above that are unsubstituted or have a substituent.
- Y in general formula (II) is a group in which one hydrogen atom of a linear alkyl group having 1 to 8 carbon atoms is substituted with an unsubstituted or substituted aryl group having 6 to 10 carbon atoms. It is preferably a straight-chain alkyl group having 1 to 8 carbon atoms, more preferably a group in which one hydrogen atom is unsubstituted or substituted with a phenyl group having a substituent. It is more preferable that one hydrogen atom of the chain alkyl group is a group substituted with an unsubstituted phenyl group, and a benzyl group is still more preferable.
- a silyl group having a substituent is a group in which at least one hydrogen atom of the silyl group is substituted.
- the substituent is not particularly limited as long as it is chemically acceptable. Specific examples include the substituents exemplified in the following (1) to (85). When 2 or 3 hydrogen atoms are substituted, the substituents may be the same or different from each other.
- Y in general formula (II) is preferably a silyl group in which 1 to 3 hydrogen atoms are substituted with the same or different alkyl groups, and three hydrogen atoms are substituted with the same or different alkyl groups.
- a trimethylsilyl group More preferably a trimethylsilyl group, a triethylsilyl group, an ethyldimethylsilyl group, or a t-butyldimethylsilyl group, and even more preferably a trimethylsilyl group.
- a silylalkyl group having a substituent is a group in which at least one hydrogen atom of an alkyl group is substituted with a silyl group having a substituent.
- the alkyl group substituted with the silyl group may be a linear alkyl group, a branched alkyl group, or a cyclic alkyl group.
- the alkyl group is preferably a linear alkyl group having 1 to 8 carbon atoms, a branched alkyl group having 3 to 8 carbon atoms, or a cyclic alkyl group having 3 to 8 carbon atoms, and has 1 to 8 carbon atoms.
- the linear alkyl group is more preferable.
- Examples of the silyl group that serves as a substituent for the alkyl group include the same silyl groups having the above substituent.
- Y in general formula (II) is preferably a group in which one hydrogen atom of a linear alkyl group having 1 to 8 carbon atoms is substituted with a silyl group having a substituent, and 1 to 8 carbon atoms. It is more preferable that 1 hydrogen atom of the straight chain alkyl group is a group in which 1 to 3 hydrogen atoms are substituted with a silyl group substituted with the same or different alkyl groups.
- one hydrogen atom of the chain alkyl group is a group substituted with a trimethylsilyl group, a triethylsilyl group, an ethyldimethylsilyl group, or a t-butyldimethylsilyl group, and more preferably a trimethylsilylmethyl group. preferable.
- Y is a linear alkyl group having 1 to 8 carbon atoms, a branched alkyl group having 3 to 8 carbon atoms, a cyclic alkyl group having 3 to 8 carbon atoms
- Preferred is an unsubstituted or substituted phenyl group, or an unsubstituted or substituted benzyl group, a linear alkyl group having 1 to 6 carbon atoms, or a branched alkyl group having 3 to 6 carbon atoms More preferably, it is a cyclic alkyl group having 3 to 6 carbon atoms.
- the reaction is carried out in a flow reactor, even when a lower alkyl azide having 6 or less carbon atoms, which is generally said to be explosive and toxic because of its low boiling point, is used as a raw material, A 1H-tetrazole derivative can be produced efficiently.
- the azide compound represented by the general formula (II) those in which Y is a linear alkyl group having 1 to 3 carbon atoms are more preferable, and methyl azide is particularly preferable.
- the azide compound represented by the general formula (II) can be synthesized from a known compound using a known chemical reaction.
- methyl azide can be synthesized by allowing dimethyl sulfate to drop and react with sodium azide in the presence of a base at 80 ° C. (for example, (See Journal of Organic Chemistry, 1990, vol. 55, pages 2304-2306.)
- Z represents —CO—, —SO 2 —, or —CR a R b —
- p represents 0 or 1
- q represents 0 or 1
- r represents 0 or 1
- R 1 represents an alkyl group or a hydrogen atom when q is 0, an alkylene group when q is 1
- R 2 represents an unsubstituted or substituted aryl group.
- R a and R b each independently represents a hydrogen atom, an alkyl group, or an unsubstituted or substituted aryl group.
- Z is —CO— (carbonyl group), —SO 2 — (sulfonyl group), or —CR a R b —
- R a and R b are each independently Represents a hydrogen atom, an alkyl group, or an aryl group having an unsubstituted or substituted group, and r represents 0 or 1. However, when r is 0, q is always 1.
- R a or R b in Z is an alkyl group
- examples of the alkyl group include the same alkyl groups as those described above for Y in the general formula (II).
- the aryl group may be an unsubstituted or substituted group exemplified for Y in the general formula (II). The thing similar to the aryl group which has is mentioned.
- Z in the general formula (III) is —CR a R b —, specifically, a methylene group (—CH 2 —) in which both R a and R b are hydrogen atoms, R a and R b A group in which either one is a hydrogen atom and the other is an alkyl group, one of R a and R b is a hydrogen atom, and the other is an unsubstituted or substituted aryl group, R a And R b are independently of each other an alkyl group or a group which is an unsubstituted or substituted aryl group.
- Specific examples of Z in the general formula (III) include the following divalent groups.
- Z in the general formula (III) is preferably —CO— or —SO 2 — rather than —CR a R b —.
- cyanide derivatives in which the group adjacent to the cyano group is a carbonyl group tend to be less reactive than the cyanide derivatives in which the group adjacent to the cyano group is a sulfonyl group.
- the reaction since the reaction is carried out in a flow reactor, even when a cyanide derivative in which the group adjacent to the cyano group is a carbonyl group is used as a raw material, the reaction efficiency is sufficiently high and the time is shorter.
- the 1H-tetrazole derivative can be prepared with
- R 1 is an alkyl group or a hydrogen atom.
- R 1 in the general formula (III) is preferably a linear alkyl group having 1 to 8 carbon atoms, a branched alkyl group having 3 to 8 carbon atoms, or a cyclic alkyl group having 3 to 8 carbon atoms. .
- R 1 is an alkylene group.
- the alkylene group may be a linear alkylene group, a branched chain alkylene group, or a cyclic alkylene group.
- the alkylene group is preferably a linear alkylene group having 1 to 8 carbon atoms, a branched alkylene group having 3 to 8 carbon atoms, or a cyclic alkylene group having 3 to 8 carbon atoms, and 1 to 6 carbon atoms.
- R 1 in the general formula (III) when q is 1 is preferably a linear alkylene group having 1 to 3 carbon atoms or a branched alkylene group having 3 carbon atoms. It is more preferably a linear alkylene group of ⁇ 3, and a methylene group is more preferable.
- [— (R 1 ) p- (R 2 ) q] is a group having a high electron-withdrawing property from the viewpoint of increasing the reaction yield.
- p is 1 and p is 1 and q is 0 in both the compound in which r is 0 and the compound in which r is 1.
- a compound in which q is 0 or 1 and q is 1 is preferable, and a compound in which p is 0 and q is 1 is more preferable.
- R 2 represents an unsubstituted or substituted aryl group, and q represents 0 or 1. However, when p is 0, q is 1.
- the aryl group may be monocyclic or polycyclic. In the polycyclic aryl group, as long as at least one ring is an aromatic ring, the remaining ring may be a saturated ring, an unsaturated ring, or an aromatic ring.
- R 2 in the general formula (III) is an aryl group having a substituent, the substituent is not particularly limited as long as it is chemically acceptable, and specifically, the following (1) to (1) to The substituent illustrated in (85) can be mentioned.
- R 2 in the general formula (III) is preferably an aryl group having 6 to 10 carbon atoms, and more preferably a phenyl group. Specifically, R 2 is particularly preferably a group represented by the following general formula (s1).
- A represents a halogen atom, an alkyl group, a haloalkyl group, an alkoxy group, a haloalkoxy group, an alkylsulfonyl group, an unsubstituted or substituted aryl group, a cyano group, or a nitro group.
- N represents an integer of 0 to 5.
- A's may be the same or different from each other, * is p in general formula (III) When R is 1, it is bonded to R 1 , p is 0 and r is 1, it is bonded to Z, and when p and r are 0, it is bonded to the carbon atom of the cyanide group.
- n is an integer of 0 to 5, preferably an integer of 0 to 3, and more preferably 0.
- A's may be the same or different from each other.
- A represents a halogen atom, an alkyl group, a haloalkyl group, an alkoxy group, a haloalkoxy group, an alkylsulfonyl group, an unsubstituted or substituted aryl group, a cyano group, or a nitro group.
- halogen atom examples include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.
- alkyl group examples include methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, i-butyl group, s-butyl group, t-butyl group, n-pentyl group, and n-hexyl group.
- the number of carbon atoms constituting the alkyl group is preferably 1-8.
- haloalkyl group examples include a fluoromethyl group, a chloromethyl group, a bromomethyl group, a difluoromethyl group, a dichloromethyl group, a trifluoromethyl group, a trichloromethyl group, a trifluoroethyl group, a pentafluoroethyl group, 3, 3, 3, 2 , 2-pentafluoropropyl group, 2,2,2-trifluoro-1-trifluoromethylethyl group and the like.
- the number of carbon atoms constituting the haloalkyl group is preferably 1-8.
- alkoxy group examples include a methoxy group, an ethoxy group, an n-propoxy group, an i-propoxy group, an n-butoxy group, an i-butoxy group, an s-butoxy group, a t-butoxy group, and an n-hexyloxy group. .
- the number of carbon atoms constituting the alkoxy group is preferably 1-8.
- the haloalkoxy group include a 2-chloro-n-propoxy group, a 2,3-dichlorobutoxy group, a trifluoromethoxy group, and the like.
- the number of carbon atoms constituting the haloalkoxy group is preferably 1-8.
- alkylsulfonyl group examples include a methylsulfonyl group, an ethylsulfonyl group, an n-propylsulfonyl group, an i-propylsulfonyl group, and a t-butylsulfonyl group.
- the number of carbon atoms constituting the alkylsulfonyl group is preferably 1-8.
- An aryl group means a monocyclic or polycyclic aryl group.
- the polycyclic aryl group as long as at least one ring is an aromatic ring, the remaining ring may be a saturated ring, an unsaturated ring, or an aromatic ring.
- aryl groups having 6 to 10 carbon atoms are preferred.
- Specific examples of the unsubstituted aryl group include a phenyl group, a 1-naphthyl group, a 2-naphthyl group, an azulenyl group, an indanyl group, and a tetralinyl group.
- the “substituent” in the aryl group having a substituent is not particularly limited as long as it is chemically acceptable. Specific examples include the substituents exemplified below.
- Halogen atoms such as fluorine atom, chlorine atom, bromine atom, iodine atom
- Cycloalkenyl groups such as 2-cyclopropenyl group, 2-cyclopentenyl group, 3-cyclohexenyl group, 4-cyclooctenyl group; (7) vinyloxy group, allyloxy group, 1-propenyloxy group, 2-butenyloxy group (8) ethynyl group, 1-propynyl group, 2-propynyl group, 1-butynyl group, 2-butynyl group, 3-butynyl group, 1-methyl-2-propynyl group, 2-methyl- 3-butynyl group, 1-pentynyl group, 2-pentynyl group, 3-pentynyl group, 4-pentynyl group, 1-methyl-2-butynyl group, 2-methyl-3-pentynyl group, 1-hexynyl group, 1, Alkynyl groups such as 1-dimethyl-2-butynyl group; (9) alkynyloxy groups such as ethynyl
- Aryloxy groups such as phenoxy group and 1-naphthoxy group
- Aralkyl groups such as benzyl group and phenethyl group
- Aralkyloxy groups such as benzyloxy group and phenethyloxy group
- Formyl group Acyl groups such as acetyl group, propionyl group, benzoyl group, cyclohexylcarbonyl group, phthaloyl group
- (22) haloalkenyloxy groups such as 2-chloro-1-propenyloxy group and 3-bromo-2-butenyloxy group; (23) haloalkynyl groups such as 3-chloro-propargyl group and 3-iodo-propargyl group; (24) haloalkynyloxy groups such as 3-chloro-propargyloxy group and 3-iodo-propargyloxy group; (25) haloaryl groups such as 4-chlorophenyl group, 4-fluorophenyl group and 2,4-dichlorophenyl group; (26) Haloaryloxy groups such as 4-fluorophenoxy group and 4-chloro-1-naphthoxy group; (27) Halogen-substituted acyls such as chloroacetyl group, trifluoroacetyl group, trichloroacetyl group and 4-chlorobenzoyl group Group: (28) methoxymethyl group, ethoxy
- arylamino groups such as anilino group, naphthylamino group and anthranylamino group; (38) aralkylamino groups such as benzylamino group and phenethylamino group; (39) methylsulfonylamino group, ethylsulfonylamino An alkylsulfonylamino group such as a group, n-propylsulfonylamino group, i-propylsulfonylamino group, n-butylsulfonylamino group; (40) an arylsulfonylamino group such as a phenylsulfonylamino group;
- Heteroarylsulfonylamino groups such as pyrazinylsulfonylamino group
- Acylamino groups such as formylamino group, acetylamino group, propanoylamino group, butyrylamino group, i-propylcarbonylamino group, benzoylamino group, etc.
- alkoxycarbonylamino groups such as methoxycarbonylamino group and ethoxycarbonylamino group; (44) fluoromethylsulfonylamino group, chloromethylsulfonylamino group, bromomethylsulfonylamino group, difluoromethylsulfonylamino group, dichloromethylsulfonyl; Amino group, 1,1-difluoroethylsulfonylamino group, trifluoromethylsulfonylamino group, 2,2,2-trifluoroethylsulfonylamino group, pentafluoroethylsulfonylamino group (45) bis (methylsulfonyl) amino group, bis (ethylsulfonyl) amino group, (ethylsulfonyl) (methylsulfonyl) amino group, bis (n-propylsulfonyl)
- Bis (fluoromethylsulfonyl) amino group bis (chloromethylsulfonyl) amino group, bis (bromomethylsulfonyl) amino group, bis (dichloromethylsulfonyl) amino group, bis (1,1-difluoroethylsulfonyl) amino
- a bis (haloalkylsulfonyl) amino group such as a group, bis (trifluoromethylsulfonyl) amino group, bis (2,2,2-trifluoroethylsulfonyl) amino group, bis (pentafluoroethylsulfonyl) amino group;
- An unsubstituted or substituted hydrazino group such as a hydrazino group, an N′-phenylhydrazino group, an N′-methoxycarbonylhydrazino group, an N′-acetylhydrazino group, an N′-methylhydrazino
- alkylthioalkyl groups such as methylthiomethyl group and 1-methylthioethyl group
- arylthioalkyl groups such as phenylthiomethyl group and 1-phenylthioethyl group
- Alkylthioalkoxy groups such as groups; (65) arylthioalkoxy groups such as phenylthiomethoxy groups and 1-phenylthioethoxy groups; (66) alkylsulfinyl groups such as methylsulfinyl groups, ethylsulfinyl groups and t-butylsulfinyl groups; (67) alkenylsulfinyl group such as allylsulfinyl group; (68) alkynylsulfinyl group such as propargylsulfinyl group; (69) arylsulfinyl group such as phenylsulfinyl group; (70) 2-pyridylsulfinyl group, 3-pyridyls group Heteroaryl arylsulfinyl group such Finiru group; (71) benzyl-sulfinyl group, phenethyl Rusuru Fin
- alkylsulfonyl groups such as methylsulfonyl group, ethylsulfonyl group, t-butylsulfonyl group; (74) alkenylsulfonyl groups such as allylsulfonyl group; (75) alkynylsulfonyl groups such as propargylsulfonyl group; (76) phenyl Arylsulfonyl groups such as sulfonyl groups; (77) heteroarylsulfonyl groups such as 2-pyridylsulfonyl groups and 3-pyridylsulfonyl groups; (78) aralkylsulfonyl groups such as benzylsulfonyl groups and phenethylsulfonyl groups; Heteroarylalkylsulfonyl groups such as a pyridylmethylsulfonyl group and a
- aryl group having a substituent examples include 4-fluorophenyl group, 4-chlorophenyl group, 2,4-dichlorophenyl group, 3,4-dichlorophenyl group, 3,5-dichlorophenyl group, and 2,6-difluorophenyl.
- n is any integer of 0 to 3
- A is preferably a halogen atom, an alkyl group or an alkoxy group
- n is any of 0 to 3
- a compound in which A is a halogen atom and n is 0 is more preferable.
- cyanide compound represented by the general formula (III) r is 0 or 1
- p is 0 or 1
- R 1 is a linear alkylene group having 1 to 3 carbon atoms or a branched chain having 3 carbon atoms.
- Compounds having a chain alkylene group, q being 1 and R 2 being a group represented by the general formula (s1) are preferred, and compounds represented by the following general formulas (III-1) to (III-48) More preferred are compounds represented by the following general formulas (III-1) to (III-32), and the following general formulas (III-1), (III-9), (III
- the compound represented by ⁇ 17) or (III-25) is more preferred, and the compound represented by the following general formula (III-1) or (III-9) is particularly preferred.
- R 1 ′ represents a linear alkylene group having 1 to 3 carbon atoms or a branched alkylene group having 3 carbon atoms
- X represents a halogen atom
- the cyanide compound represented by the general formula (III) can be synthesized from a known compound using a known chemical reaction.
- Z is a carbonyl group
- p is 0, q is 1, r is 1, and R 2 is the general formula (s1).
- the compound represented by the group (benzoyl cyanide derivative) can be produced by reacting a benzoyl halide derivative with a cyanide derivative.
- cyanide compound represented by the general formula (III) (hereinafter sometimes simply referred to as “cyanide compound”) and an azide compound represented by the general formula (II) (hereinafter simply “A flow reactor is used as a reaction vessel of “azide compound”. For this reason, even in the reaction of a highly decomposable compound such as an azide compound, the reaction can be performed relatively safely in a high temperature environment.
- the flow reactor used in the production method of the present invention includes a raw material inlet, a product outlet, and a flow path that connects these.
- the raw material is supplied from the raw material introduction port, and the product obtained by the reaction in the flow path is taken out from the product discharge port.
- the flow path may include an introduction path, and at least one of a mixer section and a reactor section (retention section) as necessary.
- the introduction path the part of the flow path that connects the raw material inlet and the mixer part
- the introduction path when there is no mixer part, the flow part that connects the raw material inlet and the reactor part is introduced. It is called a road.
- the raw material inlet is usually connected to a container filled with the raw material. You may connect the container for storing a product to a product discharge port as needed.
- the mixer part is a part having a function of mixing a plurality of liquids by diffusion, and the solutions supplied from the plurality of raw material inlets are joined at the mixer part.
- the reactor section is a site where a reaction for synthesizing a product from a plurality of raw material compounds (cyanide compound and azide compound in the production method of the present invention) is performed.
- the mixer section is provided on the raw material inlet side.
- the mixer section may not be provided.
- the upstream side of the flow reactor has a structure branched according to the number of introduction paths, and further includes at least one mixer section.
- the structure may be such that the liquids supplied from all the introduction paths are merged in one mixer section, and are merged in stages by two or more mixer sections. Also good. For example, after the liquid supplied from the two introduction paths is merged in the first mixer section, the mixed liquid discharged from the mixer section and the liquid introduced from the remaining introduction path are merged in the second mixer section. be able to.
- a part of the raw material may be charged in advance in the flow reactor channel (for example, a mixer unit), and the remaining raw material may be supplied from one or a plurality of raw material introduction ports.
- a material of the said flow reactor According to requirements, such as heat resistance, pressure resistance, solvent resistance, and processability, it can select suitably.
- the material include stainless steel, titanium, copper, nickel, aluminum, silicon, and fluororesin such as Teflon (registered trademark), PFA (perfluoroalkoxy resin), TFAA (trifluoroacetamide), PEEK (polyether). Ether ketone resin).
- the material may be substantially the same in all the flow paths, and may be different in each of the introduction path, the mixer section, and the reactor section.
- the cross-sectional shape of the flow path is not particularly limited, and may be a square, a rectangle including a rectangle, a polygon including a triangle, a pentagon, etc., a star shape, a semicircle, or a circle including an ellipse.
- the cross-sectional shape of the channel need not be constant.
- the “cross section of the flow path” means a cross section perpendicular to the flow direction of the reaction solution or the like in the flow path, and the “cross sectional area” means the area of the cross section.
- the cross-sectional area and the channel length of the channel are not particularly limited, and are appropriately adjusted in consideration of the viscosity and flow rate of the reaction solution, the reaction temperature, the reaction time, and the like. If the cross-sectional area of the flow path is too small, the pressure loss increases, and it becomes difficult to supply the raw material and flow the reaction solution. On the other hand, if it is too large, the heat exchange efficiency is lowered, temperature distribution and the like occur, and the features of the flow reactor are reduced.
- the cross-sectional areas of the flow paths may be substantially the same in all the flow paths, and the cross-sectional areas may be different in each of the introduction path, the mixer section, and the reactor section. When the flow reactor has a plurality of introduction paths, the cross-sectional areas of the introduction paths may be different from each other or the same.
- the mixer section has a function of mixing a plurality of liquids by diffusion and a function of removing reaction heat.
- a liquid mixing system in a mixer part According to the objective, it can select suitably. For example, mixing by laminar flow and mixing by turbulent flow can be mentioned.
- the mixer section is not particularly limited as long as it has a structure capable of mixing a plurality of liquids, and can be appropriately selected according to the purpose.
- a cheese tube, a micro mixer, a branched tube, etc. are mentioned.
- As the shape of the mixer section when the number of introduction paths is two, for example, a T-shape or a Y-shape can be used. When the number of introduction paths is three, for example, a cross shape is used. Can be used.
- the cross-sectional area of the mixer section is not particularly limited as long as the effects of the present invention are not impaired, and can be appropriately adjusted in consideration of the mixing method and the like. Since both the function of mixing a plurality of liquids by diffusion and the function of removing reaction heat can be satisfactorily performed, the mixer section has an inner diameter of about 10 ⁇ m to about 5 cm when the cross-sectional shape is circular. It is preferable that Moreover, although the cross-sectional area of a mixer part may be the same as other parts, such as an introduction path, the one larger than an introduction path is preferable from the point of mixing efficiency.
- the flow path length of the mixer section is not particularly limited, and can be appropriately adjusted in consideration of the mixing method, the type and amount of liquid supplied from each introduction path, the presence or absence of a reactor section, and the like.
- the cross-sectional shape is circular
- the inner diameter is about 10 ⁇ m to about 5 cm
- the flow path length can be 10 cm to 50 m.
- the flow path length of the mixer section is preferably long enough for the liquids introduced from the plurality of introduction paths to be mixed by diffusion, but when a separate reactor section is provided, the flow path length is more It may be short.
- the flow path length of the mixer section is appropriately adjusted in consideration of the optimum reaction time. It is preferable to do.
- the reactor part is a part for adjusting the length of the flow path and precisely controlling the time required for performing the reaction (residence time control).
- the reaction time corresponds to the residence time in the flow path of the reaction solution in which all raw materials are mixed. Since the residence time is proportional to the channel length, the reaction time is adjusted by adjusting the channel length.
- the configuration of the cross-sectional area, inner diameter, outer diameter, flow path length, material, and the like of the flow path of the reactor section can be appropriately selected according to the desired reaction.
- the material of the reactor part is not particularly limited, and those exemplified as the material of the flow reactor can be suitably used.
- the mixer section, the introduction path, and the reactor section are each provided with connecting means for connecting to each other as necessary.
- the connection method in the connection means is not particularly limited, and can be appropriately selected from known tube connection methods according to the purpose.
- a screw type a union type, a butt welding type, a plug welding type
- Examples include a socket welding type, a flange type, a biting type, a flare type, and a mechanical type.
- the configuration other than the introduction path, the mixer unit, and the reactor unit is not particularly limited and can be appropriately selected depending on the purpose.
- Examples of the configuration include a pump used for liquid feeding, a temperature adjusting means, a reaction promoting means, a sensor, a pressure adjusting valve, and a tank for storing the produced compound.
- the pump is not particularly limited and may be appropriately selected from those that can be used industrially. Especially, what does not produce a pulsation at the time of liquid feeding is preferable, for example, a plunger pump, a gear pump, a rotary pump, a diaphragm pump etc. are mentioned.
- the temperature adjusting means is not particularly limited and can be appropriately selected depending on the reaction temperature.
- a thermostatic bath, a circulation circulator, a heat exchanger, etc. are mentioned.
- reaction conditions for azide compound and cyanide compound The solvent of the reaction solution in the flow reactor (the solution after all the raw materials have been mixed) dissolves both the cyanide compound and the azide compound, and inhibits the cycloaddition reaction of the azide compound to the cyanide group of the cyanide compound. If it does not, it will not specifically limit.
- the solvent examples include hydrocarbon solvents such as pentane, hexane, heptane, benzene, toluene and xylene; nitrile solvents such as acetonitrile and propiononitrile; ether solvents such as diethyl ether, dioxane and tetrahydrofuran; N, N Amide solvents such as dimethylformamide, N, N-dimethylacetamide, N-methylpyrrolidone (NMP); sulfoxide solvents such as dimethyl sulfoxide; water; and mixed solvents thereof. Moreover, what added acids, such as an acetic acid, to these organic solvents may be used. In the production method of the present invention, a hydrocarbon solvent or an amide solvent is preferably used, and toluene or NMP is more preferably used.
- hydrocarbon solvents such as pentane, hexane, heptane, benzene, toluene and
- the content ratio of the cyanide compound and the azide compound in the reaction solution in the flow reactor is not particularly limited as long as the target reaction can proceed.
- the reaction solution preferably contains a sufficient amount of the azide compound relative to the cyanide compound.
- the content of the azide compound is preferably 1.4 times the molar amount or more, more preferably 1.8 times the molar amount or more, further preferably 2 times the molar amount or more, more preferably 3 times the molar amount or more. More preferably, a molar amount of 4 times or more is particularly preferable.
- the reaction temperature of the reaction solution in the flow reactor is not particularly limited as long as it can sufficiently suppress the risk of decomposition of the azide compound.
- it is preferably performed at 150 to 250 ° C., more preferably 150 to 220 ° C.
- Example 1 ⁇ Synthesis of methyl azide> 65.01 g (1 mol) of sodium azide and 159.2 g of pure water were added to a 1 L four-necked flask to prepare a 29% by mass aqueous solution of sodium azide. To the four-necked flask, 71.4 g of 28 mass% sodium hydroxide aqueous solution (50 mol%) was further added and heated to 80 ° C. While maintaining the liquid temperature at 80 ° C., 184.23 g of dimethyl sulfate (146 mol%) and 14.3 g of 28% by mass aqueous sodium hydroxide solution (10 mol%) were added dropwise, and the mixture was further reacted at 80 ° C.
- the present invention can provide a method for producing a 1H-tetrazole derivative from an azide compound and a cyanide compound.
- the production method of the present invention enables efficient and safe production of 1H-tetrazole derivatives having substituents at the 1-position and 5-position, which are useful as synthetic raw materials for tetrazoyloxime derivatives useful as active ingredients such as agricultural chemicals and pharmaceuticals,
- the production method of the present invention can be used in the production field of agricultural chemicals, medicines and the like.
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Abstract
Description
本願は、2012年6月12日に、日本に出願された特願2012-132811号に基づき優先権を主張し、その内容をここに援用する。
[1] 下記一般式(II)(一般式(II)中、Yは、アルキル基、アリール基、アリールアルキル基、置換基を有するシリル基、又は置換基を有するシリルアルキル基を表す。)で表されるアジド化合物と下記一般式(III)(一般式(III)中、Zは、-CO-、-SO2-、又は-CRaRb-(式中、Ra及びRbは、それぞれ独立して、水素原子、アルキル基、又は無置換の若しくは置換基を有するアリール基を表す。)を表し、pは0又は1を表し、qは0又は1を表し、rは0又は1を表し、R1は、qが0の場合にアルキル基又は水素原子を表し、qが1の場合にアルキレン基又は水素原子を表し、R2は、無置換の若しくは置換基を有するアリール基を表す。但し、pが0の場合、qは1であり、rが0の場合、qは1である。)で表されるシアニド化合物とを、フローリアクター内で反応させ、下記一般式(I)(一般式(I)中、Yは一般式(II)と同様であり、Z、R1、R2、p、q、及びrは一般式(III)と同様である。)で表される化合物を製造することを特徴とする、1H-テトラゾール誘導体の製造方法。
[3] 前記R2が、下記一般式(s1)(一般式(s1)中、Aは、ハロゲン原子、アルキル基、ハロアルキル基、アルコキシ基、ハロアルコキシ基、アルキルスルホニル基、無置換の若しくは置換基を有するアリール基、シアノ基、又はニトロ基を表し、nは、0~5のいずれかの整数を表す。nが2以上のとき、A同士は互いに同一であっても、相異なっていてもよい。*は、一般式(III)においてpが1の場合にはR1に結合し、pが0であり、かつrが1の場合にはZに結合し、p及びrが0の場合にはシアニド基の炭素原子に結合する。)で表される基である、前記[1]又は[2]の1H-テトラゾール誘導体の製造方法。
[5] 前記反応の反応溶液が、前記一般式(III)で表されるシアニド化合物に対し、前記一般式(II)で表されるアジド化合物を1.4倍モル量以上含有する、前記[1]~[4]のいずれかの1H-テトラゾール誘導体の製造方法。
[6] 前記反応の反応溶液の溶媒が、トルエン又はN-メチルピロリドンである、前記[1]~[5]のいずれかの1H-テトラゾール誘導体の製造方法。
本発明の1H-テトラゾール誘導体の製造方法(以下、「本発明の製造方法」ということがある。)は、アジド化合物とシアニド化合物とを、フローリアクター内で反応させ、下記一般式(I)で表される1H-テトラゾール誘導体を製造するための方法である。
一般式(II)中、Yは、アルキル基、無置換の若しくは置換基を有するアリール基、無置換の若しくは置換基を有するアリールアルキル基、置換基を有するシリル基、又は置換基を有するシリルアルキル基を表す。
一般式(III)中、Zは、-CO-、-SO2-、又は-CRaRb-を表し、pは0又は1を表し、qは0又は1を表し、rは0又は1を表し、R1は、qが0の場合にアルキル基又は水素原子を表し、qが1の場合にアルキレン基を表し、R2は、無置換の若しくは置換基を有するアリール基を表す。但し、pが0の場合、qは1であり、rが0の場合、qは1である。Ra及びRbは、それぞれ独立して、水素原子、アルキル基、又は無置換の若しくは置換基を有するアリール基を表す。
一般式(III)中のZとしては、具体的には、下記の2価基が挙げられる。
アルキル基としては、メチル基、エチル基、n-プロピル基、i-プロピル基、n-ブチル基、i-ブチル基、s-ブチル基、t-ブチル基、n-ペンチル基、n-ヘキシル基等が挙げられる。アルキル基を構成する炭素の数は1~8が好ましい。
ハロアルキル基としては、フルオロメチル基、クロロメチル基、ブロモメチル基、ジフルオロメチル基、ジクロロメチル基、トリフルオロメチル基、トリクロロメチル基、トリフルオロエチル基、ペンタフルオロエチル基、3,3,3,2,2-ペンタフルオロプロピル基、2,2,2-トリフルオロ-1-トリフルオロメチルエチル基等が挙げられる。
ハロアルキル基を構成する炭素の数は1~8が好ましい。
ハロアルコキシ基としては、2-クロロ-n-プロポキシ基、2,3-ジクロロブトキシ基、トリフルオロメトキシ基等が挙げられる。ハロアルコキシ基を構成する炭素の数は1~8が好ましい。
アルキルスルホニル基としては、メチルスルホニル基、エチルスルホニル基、n-プロピルスルホニル基、i-プロピルスルホニル基、t-ブチルスルホニル基等が挙げられる。アルキルスルホニル基を構成する炭素の数は1~8が好ましい。
無置換のアリール基として具体的には、フェニル基、1-ナフチル基、2-ナフチル基、アズレニル基、インダニル基、テトラリニル基等が挙げられる。
(1)フッ素原子、塩素原子、臭素原子、ヨウ素原子等のハロゲン原子;(2)メチル基、エチル基、n-プロピル基、i-プロピル基、n-ブチル基、s-ブチル基、i-ブチル基、t-ブチル基、n-ペンチル基、n-ヘキシル基等のアルキル基;(3)シクロプロピル基、シクロブチル基、シクロペンチル基、シクロヘキシル基、シクロヘプチル基等のシクロアルキル基;(4)メトキシ基、エトキシ基、n-プロポキシ基、i-プロポキシ基、n-ブトキシ基、i-ブトキシ基、s-ブトキシ基、t-ブトキシ基等のアルコキシ基;(5)ビニル基、1-プロペニル基、2-プロペニル基、1-ブテニル基、2-ブテニル基、3-ブテニル基、1-メチル-2-プロペニル基、2-メチル-2-プロペニル基、1-ペンテニル基、2-ペンテニル基、3-ペンテニル基、4-ペンテニル基、1-メチル-2-ブテニル基、2-メチル-2-ブテニル基、1-ヘキセニル基、2-ヘキセニル基、3-ヘキセニル基、4-ヘキセニル基、5-ヘキセニル基等のアルケニル基;
これら(1)~(85)に例示された置換基は、その中にさらに(1)~(85)に例示された置換基を化学的に許容される範囲で有することができる。
本発明の製造方法においては、一般式(III)で表されるシアニド化合物(以下、単に「シアニド化合物」ということがある。)と一般式(II)で表されるアジド化合物(以下、単に「アジド化合物」ということがある。)の反応容器として、フローリアクターを用いる。このため、アジド化合物のような分解性の高い化合物の反応においても、高温環境下で比較的安全に反応させることができる。
また、材質は、全流路において実質的に同一であってもよく、導入路、ミキサー部、リアクター部のそれぞれで異なっていてもよい。
ミキサー部内における液体の混合方式としては、特に制限はなく、目的に応じて適宜選択することができる。例えば、層流による混合、乱流による混合が挙げられる。
フローリアクター内の反応溶液(全ての原料が混合された後の溶液)の溶媒は、シアニド化合物とアジド化合物の両方が溶解し、かつシアニド化合物のシアニド基へのアジド化合物の付加環化反応を阻害しないものであれば、特に限定されるものではない。前記溶媒としては、例えば、ペンタン、ヘキサン、ヘプタン、ベンゼン、トルエン、キシレン等の炭化水素系溶媒;アセトニトリル、プロピオンニトリル等のニトリル系溶媒;ジエチルエーテル、ジオキサン、テトラヒドロフラン等のエーテル系溶媒;N,N-ジメチルホルムアミド、N,N-ジメチルアセタミド、N-メチルピロリドン(NMP)等のアミド系溶媒;ジメチルスルホキシド等のスルホキシド系溶媒;水;及びこれらの混合溶媒;等が挙げられる。また、これらの有機溶媒に、酢酸等の酸を添加したものであってもよい。本発明の製造方法においては、炭化水素系溶媒又はアミド系溶媒を用いることが好ましく、トルエン又はNMPを用いることがより好ましい。
<メチルアジドの合成>
1Lの四つ口フラスコに、65.01g(1mol)のアジ化ナトリウムと159.2gの純水を添加し、29質量%のアジ化ナトリウム水溶液を調製した。前記四つ口フラスコに、さらに71.4gの28質量%の水酸化ナトリウム水溶液(50mol%)を添加し、80℃に加温した。液温を80℃に維持した状態で184.23gの硫酸ジメチル(146mol%)と14.3gの28質量%の水酸化ナトリウム水溶液(10mol%)を滴下し、さらに80℃、20分間反応させた。反応の完結はHPLCによって確認した。この結果、48.34gのメチルアジド(収率:84.7mol%)が得られた。このうち、44.32gのメチルアジドに32.27gのトルエンを添加し、54.3質量%のメチルアジド含有トルエン溶液が得られた。
内径が1mm、流路長が34mのフローリアクターを用い、ベンゾイルシアニドと前記で得られたメチルアジドを原料として、表1に記載の条件で付加環化反応を行った。表1中、「R-CN(mol%)」は反応溶液中のベンゾイルシアニドの含有量を、「R-N3(mol%)」は反応溶液中のメチルアジドの含有量を、それぞれ示す。また、「濃度(L/mol)」は、原料であるシアニド化合物(R-CN)の仕込みモル数に対する溶媒量を示す。
<メチルアジドの合成>
1Lの四つ口フラスコに、65.01g(1mol)のアジ化ナトリウムと160.3gの純水を添加し、29質量%のアジ化ナトリウム水溶液を調製した。前記四つ口フラスコに、さらに71.2gの28質量%の水酸化ナトリウム水溶液(50mol%)を添加し、80℃に加温した。液温を80℃に維持した状態で190.18gの硫酸ジメチル(151mol%)と14.67gの28質量%の水酸化ナトリウム水溶液(10mol%)を滴下し、さらに80℃、20分間反応させた。反応の完結はHPLCによって確認した。この結果、53.88gのメチルアジド(収率:94.2mol%)が得られた。さらに33.48gのN-メチルピロリドン(NMP)を添加し、61.7質量%のメチルアジド含有NMP溶液が得られた。
内径が1mm、流路長が34mのフローリアクターを用い、ベンゾイルシアニドと前記で得られたメチルアジドを原料として、表3に記載の条件で付加環化反応を行った。表3中、「R-CN(mol%)」は反応溶液中のベンゾイルシアニドの含有量を、「R-N3(mol%)」は反応溶液中のメチルアジドの含有量を、それぞれ示す。また、「濃度(L/mol)」は、原料であるシアニド化合物(R-CN)の仕込みモル数に対する溶媒量を示す。
SUSオートクレーブを用いて、ベンゾイルシアニドと実施例1で合成したメチルアジドを原料として、表5に記載の条件で付加環化反応を行った。表5中、「R-CN(mol%)」及び「R-N3(mol%)」は表1と同じである。
反応終了後の反応溶液中の1-メチル-5-ベンゾイル-1H-テトラゾールとベンゾイルシアニドの含有量を測定した。測定結果を表5に示した。35時間という長時間の反応を行ったが、1-メチル-5-ベンゾイル-1H-テトラゾールの収率は2.4mol%でしかなかった。
本発明の製造方法により、農薬、医薬等の有効成分として有用なテトラゾイルオキシム誘導体の合成原料として有用な1位と5位に置換基を有する1H-テトラゾール誘導体を効率よく安全に製造できるため、本発明の製造方法は、農薬、医薬等の製造分野で利用可能である。
Claims (6)
- 下記一般式(II)
- 前記Yは、アルキル基を表す、請求項1に記載の1H-テトラゾール誘導体の製造方法。
- 前記反応の反応温度が150~250℃である、請求項1~3のいずれか一項に記載の1H-テトラゾール誘導体の製造方法。
- 前記反応の反応溶液が、前記一般式(III)で表されるシアニド化合物に対し、前記一般式(II)で表されるアジド化合物を1.4倍モル量以上含有する、請求項1~4のいずれか一項に記載の1H-テトラゾール誘導体の製造方法。
- 前記反応の反応溶液の溶媒が、トルエン又はN-メチルピロリドンである、請求項1~5のいずれか一項に記載の1H-テトラゾール誘導体の製造方法。
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JP2014521306A JP5789050B2 (ja) | 2012-06-12 | 2013-06-07 | 1h−テトラゾール誘導体の製造方法 |
CN201380030366.7A CN104350043B (zh) | 2012-06-12 | 2013-06-07 | 1h‑四唑衍生物的制造方法 |
AU2013275414A AU2013275414B2 (en) | 2012-06-12 | 2013-06-07 | Method for producing 1H-tetrazole derivative |
EP13805023.2A EP2845853B1 (en) | 2012-06-12 | 2013-06-07 | Method for producing 1h-tetrazole derivative |
KR1020147034108A KR101639507B1 (ko) | 2012-06-12 | 2013-06-07 | 1h-테트라졸 유도체의 제조 방법 |
US14/406,605 US9630933B2 (en) | 2012-06-12 | 2013-06-07 | Method for producing 1-H-tetrazole derivative |
IL236122A IL236122B (en) | 2012-06-12 | 2014-12-08 | Production method for h1-tetrazole derivative |
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RU2010116339A (ru) * | 2010-04-26 | 2011-11-10 | Мерк Патент ГмбХ (DE) | Синтез производных тетразола |
US20130225819A1 (en) * | 2010-08-18 | 2013-08-29 | Massachusetts Institute Of Technology | Use of azides in synthesis |
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WO2003016303A1 (fr) | 2001-08-20 | 2003-02-27 | Dainippon Ink And Chemicals, Inc. | Derive de tetrazoyle oxime et produit chimique agricole contenant ledit derive comme principe actif |
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EP2845853B1 (en) | 2017-01-25 |
CN104350043A (zh) | 2015-02-11 |
US20150322021A1 (en) | 2015-11-12 |
KR20150006878A (ko) | 2015-01-19 |
AU2013275414A1 (en) | 2015-01-22 |
KR101639507B1 (ko) | 2016-07-13 |
ZA201409027B (en) | 2016-06-29 |
US9630933B2 (en) | 2017-04-25 |
EP2845853A1 (en) | 2015-03-11 |
JPWO2013187327A1 (ja) | 2016-02-04 |
IL236122A0 (en) | 2015-02-01 |
JP5789050B2 (ja) | 2015-10-07 |
IL236122B (en) | 2018-11-29 |
EP2845853A4 (en) | 2015-11-04 |
AU2013275414B2 (en) | 2015-10-29 |
CN104350043B (zh) | 2017-05-03 |
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