WO2013032035A1 - Process for producing n-(hetero)arylazoles - Google Patents
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- WO2013032035A1 WO2013032035A1 PCT/JP2012/072828 JP2012072828W WO2013032035A1 WO 2013032035 A1 WO2013032035 A1 WO 2013032035A1 JP 2012072828 W JP2012072828 W JP 2012072828W WO 2013032035 A1 WO2013032035 A1 WO 2013032035A1
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- YQZCSEVPKQVTQP-UHFFFAOYSA-N C1N(C2CCCCC2)C=CN1C1CCCCC1 Chemical compound C1N(C2CCCCC2)C=CN1C1CCCCC1 YQZCSEVPKQVTQP-UHFFFAOYSA-N 0.000 description 1
- SVPCGNNBMOQECU-UHFFFAOYSA-N C1N(C2CCCCC2)c2ccccc2N1C1CCCCC1 Chemical compound C1N(C2CCCCC2)c2ccccc2N1C1CCCCC1 SVPCGNNBMOQECU-UHFFFAOYSA-N 0.000 description 1
- WLZCDCXFXATHNC-UHFFFAOYSA-N CC(C)(C)N(C1)C=CN1C(C)(C)C Chemical compound CC(C)(C)N(C1)C=CN1C(C)(C)C WLZCDCXFXATHNC-UHFFFAOYSA-N 0.000 description 1
- DKLHCGXDPGZQQA-UHFFFAOYSA-N CC(C)(C)N(C1)c(cccc2)c2N1C(C)(C)C Chemical compound CC(C)(C)N(C1)c(cccc2)c2N1C(C)(C)C DKLHCGXDPGZQQA-UHFFFAOYSA-N 0.000 description 1
- HHSNIRLXHJNXAK-UHFFFAOYSA-N CC(C)N(C1)C=CN1C(C)C Chemical compound CC(C)N(C1)C=CN1C(C)C HHSNIRLXHJNXAK-UHFFFAOYSA-N 0.000 description 1
- YDASWDXQJDDHSV-UHFFFAOYSA-N O=C(c1ccccc1)c(cc1)ccc1-[n]1c(cccc2)c2c2ccccc12 Chemical compound O=C(c1ccccc1)c(cc1)ccc1-[n]1c(cccc2)c2c2ccccc12 YDASWDXQJDDHSV-UHFFFAOYSA-N 0.000 description 1
- VFUDMQLBKNMONU-UHFFFAOYSA-N c(cc1)cc(c2ccccc22)c1[n]2-c(cc1)ccc1-c(cc1)ccc1-[n]1c2ccccc2c2c1cccc2 Chemical compound c(cc1)cc(c2ccccc22)c1[n]2-c(cc1)ccc1-c(cc1)ccc1-[n]1c2ccccc2c2c1cccc2 VFUDMQLBKNMONU-UHFFFAOYSA-N 0.000 description 1
- FEWPRDHQCJVUJR-UHFFFAOYSA-N c(cc1)cc(c2ccccc22)c1[n]2-c1nc(cccc2)c2cc1 Chemical compound c(cc1)cc(c2ccccc22)c1[n]2-c1nc(cccc2)c2cc1 FEWPRDHQCJVUJR-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/56—Ring systems containing three or more rings
- C07D209/58—[b]- or [c]-condensed
- C07D209/60—Naphtho [b] pyrroles; Hydrogenated naphtho [b] pyrroles
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/56—Ring systems containing three or more rings
- C07D209/80—[b, c]- or [b, d]-condensed
- C07D209/82—Carbazoles; Hydrogenated carbazoles
- C07D209/86—Carbazoles; Hydrogenated carbazoles with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the ring system
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C409/00—Peroxy compounds
- C07C409/02—Peroxy compounds the —O—O— group being bound between a carbon atom, not further substituted by oxygen atoms, and hydrogen, i.e. hydroperoxides
- C07C409/04—Peroxy compounds the —O—O— group being bound between a carbon atom, not further substituted by oxygen atoms, and hydrogen, i.e. hydroperoxides the carbon atom being acyclic
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/02—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom condensed with one carbocyclic ring
- C07D209/04—Indoles; Hydrogenated indoles
- C07D209/08—Indoles; Hydrogenated indoles with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to carbon atoms of the hetero ring
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
- C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
- C07D401/04—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
- C07D401/14—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing three or more hetero rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D409/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms
- C07D409/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings
- C07D409/04—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings directly linked by a ring-member-to-ring-member bond
Definitions
- the present invention relates to a process for producing an N-(hetero)arylazole useful as a medical or agrochemical product, an organic photoconductor, an organic electroluminescent element material, or the like.
- N-(hetero)arylazoles are compounds useful as medical or agrochemical products, organic photoconductors, organic electroluminescent element materials, and the like. These compounds have conventionally been produced by the Ullmann reaction, known as a process for synthesizing N-(hetero)arylamines, wherein a copper compound is used as a catalyst.
- the original Ullmann reaction involves such defects as use of a large amount of catalyst, harsh reaction conditions, limitation as to substrates, and complicated after-treatment, and has long been believed to be a reaction having poor usefulness. With the development of research in recent years, significant improvements are being made. However, there still remains the defect that a substrate which is highly reactive but is expensive, such as (hetero)aryl bromide, (hetero)aryl iodide, or (hetero)aryl boronic acid, is required.
- Non-Patent Literature 2 to 7 Use of a base is necessary for this reaction, and alkali metal compounds are used in common as a base in these reports. Some of these reactions proceed under comparatively moderate conditions and permit use of (hetero)aryl chlorides (Non-Patent Literature 3, 4, 5, and 7). Additionally, regarding the Buchwald- Hartwig amination, the concept itself of using not an alkali metal compound but a magnesium compound as the base has long been proposed (Patent Literature 1).
- Non-Patent Literature 8 a reaction between indole which is one kind of NH-azoles and an aryl halide in which various magnesium compounds are used as bases in the presence of the catalyst composed of palladium(II) acetate and triphenylphosphine.
- Non-Patent Literature 1 David S. Surry et al., Angewandte Chemie
- Non-Patent Literature 2 Grace Mann et al., Journal of American Chemical Society, 1998, 120, 827-828.
- Non-Patent Literature 3 John F. Hartwig et al., The Journal of Organic Chemistry, 1999, 64, 5575-5580.
- Non-Patent Literature 4 David W. Old et al., Organic Letters, 2000, 2, 1403-
- Non-Patent Literature 5 Makoto Watanabe et al., Tetrahedron Letters, 2000, 41, 481-483.
- Non-Patent Literature 6 Gabriela A. Grasa et al., The Journal of Organic Chemistry, 2001, 66, 7729-7737.
- Non-Patent Literature 7 Ken Suzuki et al., Advanced Synthesis and Catalysis, 2008, 350, 652-656.
- Non-Patent Literature 9 Benjamin Souharce et al., Macromolecular Rapid Communications, 2009, 30, 1258-1262.
- the present invention has been made in consideration of the above-described circumstances, and an object thereof is to provide a process for effectively producing an N-(hetero)arylazole useful as, for example, a medical or agrochemical product, an organic photoconductor material, an organic electroluminescent element material, or the like.
- the catalysts are required to be used in a large amount of as much as 0.01 equivalent (1.0 mol %) or more as is different from the synthesis reaction of N-(hetero)arylamines which proceed with the aid of a slight amount of catalyst.
- Non-Patent Literatures 8 (Non-Patent Literatures 8)
- Non-Patent Literature 9 With regard to the technique described in Non-Patent Literature 9, with this reaction, there remain problems that an inexpensive aryl chloride cannot be used as a substrate and that amount of the catalyst required is extremely large as much as 0.05 equivalent (5.0 mol %). That is, various problems with the synthesis of N-
- Non-Patent Literature 8 N-(hetero)arylazoles can be regioselectively obtained in the presence of an appropriate (i.e., electron-rich and bulky) coordination compound, thus the present invention having been completed based on these findings.
- the present invention provides the following process for producing an N- (hetero)arylazole.
- a process for producing an N-(hetero)arylazole which comprises reacting a (hetero)aryl (pseudo)halide with an NH-azole in the presence of: a catalyst comprising a palladium compound and a coordination compound; and a basic magnesium compound.
- R 1 and R 2 each independently represents an alkyl group, and R represents a hydrocarbyl group which may have a substituent, a heteroaryl group which may have a substituent or a ferrocenyl group which may have a substituent;
- diphosphines represented by the following general formula (2)
- R 4 to R 7 each independently represents an alkyl group, or an aryl group which may have a substituent, and Q represents a divalent group which may have a substituent;
- N represents a nitrogen atom
- R 8 and R 9 each independently represents an alkyl group
- imidazolidin-ylidenes represented by the following general formula (4) wherein N represents a nitrogen atom, and R 10 and R 11 each independently represents an alkyl group or an aryl group.
- (Het)Ar represents an aromatic ring group which may have a substituent or a heteroaromatic ring group which may have a substituent
- X represents a
- n of X represents the number of the substituent X into (Het)Ar, and is an integer of from 1 to 7.
- NH-azole is at least one compound selected from the group consisting of lH-pyrrole which may have a substituent, indole which may have a substituent, carbazole which may have a substituent, benzocarbazoles which may have a substituent, dibenzocarbazoles which may have a substituent, indolocarbazoles which may have a substituent, biindoles which may have a substituent and bicarbazoles which may have a substituent.
- Mg represents a magnesium atom
- R 12 and R 13 each independently represents a hydrocarbyl group, an alkoxy group, an amino group or a halogeno group; and when R 12 represents a halogeno group, R 13 do not represent a halogeno group; and when R 13 represents a halogeno group, R 12 do not represent a halogeno group.
- N- (hetero)arylazoles useful as medical or agrochemical products, organic photoconductor materials, organic electroluminescent element materials, or the like can be produced with low cost and high efficiency.
- Palladium compounds to be used in the production process of the invention are not particularly limited, but preferred examples thereof include
- These palladium compounds in the production process of the invention may be used independently or in a proper combination of two or more thereof.
- the amount of the palladium compound is not particularly limited, but is usually from 0.00001 to 0.1 equivalents (from 0.001 to 10.0 mol %) in terms of palladium atom, per mol of the NH- azoles and, in view of profitability and reaction reproducibility, a proper amount is selected preferably within the range of from 0.0001 to 0.05 equivalents (0.01 to 5.0 mol %).
- the coordination compound to be used in the production process of the invention is preferably selected from the group consisting of:
- R and R each independently represents an alkyl group, and R represents a hydrocarbyl group which may have a substituent, a heteroaryl group which may have a substituent, or a ferrocenyl group which may have a substituent);
- diphosphines represented by the following general formula (2):
- R 4 to R 7 each independently represents an alkyl group or an aryl group which may have a substituent, and Q represents a divalent group which may have a substituent);
- N represents a nitrogen atom, and R and R each independently represents an alkyl group
- imidazolidin-ylidenes represented by the following general formula (4): (wherein N represents a nitrogen atom, and R 10 and R 11 each independently represents an alkyl group or an aryl group).
- R 1 and R 2 each independently represents an alkyl group.
- the alkyl group include alkyl groups containing preferably from 1 to 20 carbon atoms, more preferably from 2 to 15 carbon atoms, further more preferably from 3 to 10 carbon atoms, which may be straight, branched, or cyclic.
- a secondary alkyl group, a tertiary alkyl group, or a cycloalkyl group is particularly preferred. Specific examples thereof include an isopropyl group, a tert-butyl group, a cyclohexyl group, and a 1-adamantyl group.
- R and R may be connected to each other to form a ring containing the phosphorus atom.
- R 3 represents a hydrocarbyl group which may have a substituent, a heteroaryl group which may have a substituent, or a ferrocenyl group which may have a substituent.
- R 3 and R 1 , or R 3 and R 2 may be connected to each other to form a ring containing the phosphorus atom.
- monophosphines represented by the general formula (1) include tri-tert-butylphosphine ( l Bu 3 P), di-tert-butylmethylphosphine ('B ⁇ PMe), di-tert-butylneopentylphosphine (DTBNpP), triisopropylphosphine ('Pr 3 P), tricyclohexylphosphine (Cy 3 P), dicyclohexyl(2,4,6-trimethylphenyl)phosphine
- R 4 to R 7 each independently represents an alkyl group or an aryl group which may have a substituent.
- the alkyl group include alkyl groups containing preferably from 1 to 20 carbon atoms, more preferably from 2 to 15 carbon atoms, further more preferably from 3 to 10 carbon atoms, which may be straight, branched, or cyclic. Of these, a secondary alkyl group, a tertiary alkyl group, or a cycloalkyl group is particularly preferred.
- aryl group examples include aryl groups containing preferably from 6 to 18 carbon atoms, more preferably from 6 to 12 carbon atoms.
- aryl group examples include a phenyl group, a methylphenyl group, a dimethylphenyl group, a naphthyl group, and a biphenyl group.
- R 4 and R 5 , and R 6 and R 7 each may be connected to each other to form a ring containing the phosphorus atom.
- Q represents a divalent group which may have a substituent.
- examples of the divalent group include those divalent groups which give a phosphorus atom-transition metal atom- phosphorus atom angle (ZPMP) in a transition metal diphosphine complex represented by the following general formula (7), that is, a bite angle in the diphosphine, of 75 to 140°, preferably 80 to 130°, more preferably 85 to 120°.
- ZPMP phosphorus atom-transition metal atom- phosphorus atom angle
- R to R each independently represents an alkyl group or an aryl group which may have a substituent
- Q represents a divalent group which may have a substituent
- M represents a transition metal atom
- diphosphines represented by the general formula (2) include l, -bis(diisopropylphosphino)ferrocene (DiPPF), 1,1'- bis(dicyclohexylphosphino)ferrocene (DCyPF), l-[2-
- R and R each independently represents an alkyl group.
- the alkyl group include alkyl groups containing preferably from 1 to 20 carbon atoms, more preferably from 2 to 15 carbon atoms, further more preferably from 3 to 10 carbon atoms, which may be straight, branched, or cyclic.
- a secondary alkyl group, a tertiary alkyl group, or a cycloalkyl group is particularly preferred. Specific examples thereof include an isopropyl group, a tert-butyl group, a cyclohexyl group, and a 1 - adamantyl group.
- Particularly preferred specific examples of the (benzo)imidazol- ylidenes represented by the general formula (3-1) or (3-2) include 1,3- diisopropylimidazol-2-ylidene (IiPr), l,3-di-tert-butylimidazol-2-ylidene (ItBu), 1,3- dicyclohexylimidazol-2-ylidene (ICy), l,3-di(l-adamantyl)imidazol-2-ylidene (IAd), 1 ,3-di-tert-butylbenzimidazol-2-ylidene (BItBu), 1 ,3-dicyclohexylbenzimidazol-2- ylidene (BICy), and l,3-di(l-adamantyl)imidazol-2-ylidene (BIAd), whose structural
- R 10 and R 11 each independently represents an alkyl group or an aryl group.
- the alkyl group include alkyl groups containing preferably from 1 to 20 carbon atoms, more preferably from 2 to 15 carbon atoms, further more preferably from 3 to 10 carbon atoms, which may be straight, branched, or cyclic.
- a secondary alkyl group, a tertiary alkyl group, or a cycloalkyl group is particularly preferred. Specific examples thereof include an isopropyl group, a tert-butyl group, a cyclohexyl group, and a 1 - adamantyl group.
- aryl group examples include aryl groups containing preferably from 6 to 18 carbon atoms, more preferably from 6 to 12 carbon atoms. Specific examples thereof include a phenyl group, a 2,6-dimethylphenyl group, a 2,4,6- trimethylphenyl group, and a 2,6-diisopropylphenyl group.
- imidazolidin-ylidenes represented by the general formula (4) include l,3-diisopropylimidazolidin-2-ylidene (SliPr), 1,3- dicyclohexylimidazolidin-2-ylidene (SICy), 1 ,3-di(l -adamantyl)imidazolidin-2-ylidene (SIAd), l,3-bis(2,6-diisopropylphenyl)imidazolidin-2-ylidene (SIPr), and l ,3-bis(2,4,6- trimethylphenyl)imidazolidin-2-ylidene (SIMes), whose structural formulae are shown below.
- the coordination compound to be used in the production process of the invention is unstable in the air, it is also preferred to use, as a substitute therefor, a salt of the coordination compound obtained by reacting with a Broensted acid.
- a Broensted acid include hydrogen chloride, hydrogen bromide, hydrogen iodide, tetrafluoroboric acid, and tetraphenylboric acid.
- Specific examples of the salt of coordination compound include tri-tert- butylphosphonium tetrafluoroborate ( l Bu 3 PHBF 4 ), tri-tert-butylphosphonium
- coordination compounds in the production process of the invention may be used independently or in a proper combination of two or more thereof.
- the amount of the coordination compound to be used is not particularly limited, but is usually properly selected within the range of from 0.5 to 10.0 equivalents, preferably from 0.8 to 5.0 equivalents, per mol of palladium atom in the palladium compound.
- method of adding the catalyst including the palladium compound and the coordination compound is not particularly limited, but the palladium compound and the coordination compound may be independently added to the reaction system; a catalyst solution previously prepared by reacting the palladium compound and the coordination compound with each other outside the reaction system may be added; or they may be added as a palladium complex synthesized by the reaction between the palladium compound and the coordination compound.
- palladium complex examples include acetato(2'-di-tert- butylphosphino- 1 , 1 '-biphenyl-2-yl)pallaldium(II) (Pd(OAc)(johnphos)),
- allylchloro [ 1 ,3 -bis(2,6-diisopropylphenyl)imidazolidin-2-ylidene]palladium(II) (PdCl(7T-alllyl)(SIPr)), allylchloro(di-tert-butylneopentylphosphine)palladium(II) (PdCl(7t-allyl)(DTBNpP)), bis(di-tert-butylneopentylphosphine)palladium(0)
- palladium complexes in the production process of the invention may be used independently or in a proper combination of two or more thereof.
- the palladium complexes may be used in a proper combination with the coordination compounds in the production process of the invention.
- the (hetero)aryl (pseudo)halide to be used in the production process of the invention is preferably a compound represented by the following general formula (5):
- (Het)Ar represents an aromatic ring group which may have a substituent or a heteroaromatic ring group which may have a substituent
- X represents a (pseudo)halogeno group
- n of X represents the number of the substituent X into (Het)Ar, and is an integer of from 1 to 7).
- (Het)Ar represents an aromatic ring group which may have a substituent or a heteroaromatic ring group which may have a substituent.
- the aromatic ring group is not particularly limited, but examples thereof include those groups which are derived from aromatic rings containing preferably from 6 to 30 carbon atoms, more preferably from 6 to 25 carbon atoms, further more preferably from 6 to 20 carbon atoms.
- Specific examples of particularly preferred aromatic ring include benzene, naphthalene, anthracene, phenanthrene, pyrene, perylene, and fluorene, whose structural formulae are shown below.
- a dimer may be formed by these aromatic rings, and specific examples thereof include biphenyl, ⁇ , -binaphthyl, 9,9'-bianthryl, and 9,9'-spirobi[9H-fluorene].
- aromatic ring groups may be substituted by an oxo group, and specific examples thereof include anthraquinone and fluorenone.
- heteroaromatic ring group is not particularly limited, but examples thereof include those groups which are derived from heteroaromatic rings containing preferably from 1 to 25 carbon atoms, more preferably from 1 to 20 carbon atoms, further more preferably from 2 to 15 carbon atoms.
- Specific examples of particularly preferred heteroaromatic ring include furan, thiophene, lH-pyrrole, pyridine, 1,3,4-oxadiazole, 1,3,4-thiadiazole, 1,3,5-triazine, benzofuran, dibenzofuran, benzothiophene,
- dibenzothiophene indole, carbazole, quinoline, acridine, phenanthridine,
- benzo[f]isoquinoline benzo[g] isoquinoline
- benzo[h]isoquinoline whose structural formulae are shown below.
- (pseudo)halogeno group which means pseudohalogeno group and/or halogeno group, and preferred examples thereof include a chloro group, a bromo group, a
- (halo)alkanesulfonyloxy group and an arenesulfonyloxy group.
- Specific examples of the (halo) alkanesulfonyloxy group include a methanesulfonyloxy group, a
- n of X represents the number of the substituent X into (Het)Ar, and is an integer of from 1 to 7, preferably from 1 to 5, more preferably from 1 to 3. In the case where n is 2 or more, that is, in the case where (Het)Ar is substituted by plural Xs, all of the plural Xs may be the same, or they may be independently different from each other.
- the NH-azole to be used in the production process of the invention is a nitrogen-containing-5-membered heteroaryl compound having a hydrogen atom on the nitrogen atom, and specific examples thereof include lH-pyrrole, pyrazole, imidazole, 1,2,3-triazole, 1,2,4-triazole, and tetrazole, whose structural formulae are shown below.
- NH-azoles may form a fused ring together with themselves or aromatic rings, and specific examples thereof include indole, isoindole, indazole, benzimidazole, benzotriazole, carbazole, 7H-benzo[c]carbazole, 7H-dibenzo[c,g]carbazole, indolo[2,3- a]carbazole, and indolo[3,2-b]carbazole.
- a dimer may be formed by these compounds, and specific examples thereof include 3,3'-bi[lH-indole], 5,5'-bi[lH- indole], 3,3'-bi[9H-carbazole], l,9'-bi[9H-carbazole], and 3,9'-bi[9H-carbazole].
- NH-azole particularly preferred examples include lH-pyrrole, indole, carbazole, benzocarbazoles, dibenzocarbazoles, indolocarbazoles, biindoles, and bicarbazoles.
- the (hetero)aryl (pseudo)halide and the NH-azole to be used in the production process of the invention may have a substituent.
- the substituent is not particularly limited as long as it does not participate in the reaction in the production process of the invention, and examples thereof include a hydrocarbyl group, an aliphatic heterocyclic group, a heteroary] group, an alkoxy group, an aryloxy group, an aralkyloxy group, a heteroaryloxy group, an acyloxy group, a carbonate group, an acyl group, a carboxyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an aralkyloxycarbonyl group, a heteroaryloxycarbonyl group, a carbamoyl group, a hydroxamic acid group, an alkylthio group, an arylthio group, an aralkylthio group, a heteroarylthio group, an acylthi
- hydrocarbyl group examples thereof include an alkyl group, an alkenyl group, an alkynyl group, an aryl group, and an aralkyl group.
- alkyl group includes alkyl groups containing preferably from 1 to 15 carbon atoms, more preferably from 1 to 12 carbon atoms, further more preferably from 1 to 8 carbon atoms, which may be straight, branched, or cyclic.
- Specific examples thereof include a methyl group, an ethyl group, a n-propyl group, an isopropyl group, a cyclopropyl group, a n-butyl group, a 2-butyl group, an isobutyl group, a tert-butyl group, a cyclobutyl group, a n-pentyl group, a 2- pentyl group, a tert-pentyl group, a 2-methylbutyl group, a 3-methylbutyl group, a 2,2- dimethylpropyl group, a cyclopentyl group, a n-hexyl group, a 2-hexyl group, a 3-hexyl group, a tert-hexyl group, a 2-methylpentyl group, a 3 -methylpentyl group, a 4- methylpentyl group, a 2-methylpentan-3-yl group, a
- alkenyl group examples thereof include alkenyl groups containing preferably from 2 to 15 carbon atoms, more preferably from 2 to 12 carbon atoms, further more preferably from 2 to 8 carbon atoms, which may be straight, branched, or cyclic. Specific examples thereof include a vinyl group, a propenyl group, a butenyl group, a pentenyl group, a hexenyl group, a heptenyl group, and an octenyl group.
- alkynyl group examples thereof include alkynyl groups containing preferably from 2 to 15 carbon atoms, more preferably from 2 to 12 carbon atoms, further more preferably from 2 to 8 carbon atoms, which may be straight, branched, or cyclic. Specific examples thereof include an ethynyl group, a propynyl group, a butynyl group, a pentynyl group, a hexynyl group, a heptynyl group, and an octynyl group.
- aryl group examples thereof include aryl groups containing preferably from 6 to 30 carbon atoms, more preferably from 6 to 25 carbon atoms, further more preferably from 6 to 20 carbon atoms. Specific examples thereof include a phenyl group, a naphthyl group, an anthryl group, a phenanthrenyl group, a pyrenyl group, and a perylenyl group.
- aralkyl group examples thereof include those groups which are formed by replacing at least one hydrogen atom of the above-described alkyl group by the above-described aryl group, and specific examples thereof include a benzyl group, a 1 -phenylethyl group, a 2-phenylethyl group, a 2-phenyl-2-propyl group, a diphenylmethyl group, a 1,1-diphenyl ethyl group, and a triphenylmethyl group.
- alkoxy group examples thereof include alkoxy groups containing preferably from 1 to 15 carbon atoms, more preferably from 1 to 12 carbon atoms, further more preferably from 1 to 8 carbon atoms, which may be straight, branched, or cyclic.
- Specific examples thereof include a methoxy group, an ethoxy group, a n-propoxy group, an isopropoxy group, a n-butoxy group, a 2-butoxy group, an isobutoxy group, a tert- butoxy group, a n-pentyloxy group, a 2-methylbutoxy group, a 3-methylbutoxy group, a 2,2-dimethylpropyloxy group, a n-hexyloxy group, a 2-methylpentyloxy group, a 3- methylpentyloxy group, a 4-methylpentyloxy group, a 5-methylpentyloxy group, a cyclohexyloxy group, a n-heptyloxy group, and a n-octyloxy group.
- aryloxy group examples thereof include aryloxy groups containing preferably from 6 to 30 carbon atoms, more preferably from 6 to 25 carbon atoms, further more preferably from 6 to 20 carbon atoms, and specific examples thereof include a phenyloxy group, a naphthyloxy group, and an anthryloxy group.
- acyl group examples thereof include acyl groups containing from 1 to 14 carbon atoms which are derived from aliphatic carboxylic acids not having any hydrogen atom at a-position thereof or derived from aromatic carboxylic acid .
- Specific examples thereof include a trifluoroacetyl group, a pivaloyl group, a benzoyl group, a naphthylcarbonyl group, and an anthrylcarbonyl group.
- alkylthio group examples thereof include alkylthio groups containing preferably from 1 to 15, more preferably from 1 to 12, further more preferably from 1 to 8 carbon atoms, which may be straight, branched, or cyclic. Specific examples thereof include a methylthio group, an ethylthio group, a n-propylthio group, an isopropylthio group, a n-butylthio group, a 2-butylthio group, an isobutylthio group, a tert-butylthio group, a n-pentylthio group, a n-hexylthio group, a cyclohexylthio group, a n-heptylthio group, and a n-octylthio group.
- arylthio group examples thereof include arylthio groups containing preferably from 6 to 30, more preferably from 6 to 25, further more preferably from 6 to 20 carbon atoms, and specific examples thereof include a phenylthio group, a naphthylthio group, and an anthrylthio group.
- amino group examples thereof include amino groups wherein two hydrogen atoms on the nitrogen atom are replaced by the above-described hydrocarbyl groups exemplified as the preferable substituent, and specific examples thereof include an ⁇ , ⁇ -dimethylamino group, an ⁇ , ⁇ -diethylamino group, an N-methyl-N- phenylamino group, an ⁇ , ⁇ -diphenylamino group, an N,N-bis(4-methylphenyl)amino group, an N-naphthyl-N-phenylamino group, an N-benzyl-N-phenylamino group, and an ⁇ , ⁇ -dibenzylamino group.
- the two hydrocarbyl groups on the nitrogen atom of the amino group may be connected to each other to form a ring.
- Specific examples thereof include a pyrrolidin-l-yl group, a piperidin-l-yl group, a IH-pyrrol-l -yl group, a lH-indol-l-yl group, and a 9H-carbazol-9-yl group.
- silyl group examples thereof include silyl groups wherein three hydrogen atoms on the silicon atom are replaced by the above-described hydrocarbyl groups exemplified as the preferable substituent, and specific examples thereof include a trimethylsilyl group, a triethylsilyl group, a triisopropylsilyl group, a tert-butyldimethylsilyl group, a dimethylphenylsilyl group, a tert-butyldiphenyl group, and a triphenylsilyl group.
- substituents having an aromatic ring as the partial structure thereof may be substituents wherein the aromatic ring is further substituted by a
- (pseudo)halogeno group preferably a chloro group, a bromo group, a
- the substituents may be active substituents.
- active substituents include a chlorophenyl group, a bromophenyl group, a p- toluenesulfonyloxyphenyl group, a (chlorophenyl)methyl group, a
- substituents may be connected to each other to form a ring. Further, in the case where the NH-azole is substituted by a plurality of substituents, the substituents may be connected to each other to form a ring.
- the basic magnesium compound (hereinafter, referred to as magnesium bases) in the production process of the invention is preferably at least one kind selected from the group consisting of inorganic magnesium bases and organic magnesium bases represented by the following general formula (6):
- Mg represents a magnesium atom
- R and R each independently represents a hydrocarbyl group, an alkoxy group, an amino group, or a halogeno group, provided that when R 12 represents a halogeno group, R 13 do not represent a halogeno group; and when R represents a halogeno group, R do not represent a halogeno group).
- the inorganic magnesium bases include magnesium acetate tetrahydrate, basic magnesium tetracarbonate-magnesium hydroxide pentahydrate, magnesium hydride, magnesium hydroxide, magnesium oxide, magnesium phosphate hydrate, and magnesium hydrogenphosphate trihydrate, with magnesium oxide and magnesium hydroxide being preferred in view of reactivity.
- R each independently represents a hydrocarbyl group, an alkoxy group, an amino group, or a halogeno group, provided that when R represents a halogeno group, R do not represent a halogeno group; and when R represents a halogeno group, R do not represent a halogeno group.
- the hydrocarbyl group include an alkyl group, an alkenyl group, an aryl group, and an aralkyl group.
- examples of the alkyl group includes alkyl groups containing preferably from 1 to 15 carbon atoms, more preferably from 1 to 12 carbon atoms, further more preferably from 1 to 8 carbon atoms, which may be straight, branched, or cyclic.
- Specific examples thereof include a methyl group, an ethyl group, a n-propyl group, an isopropyl group, a cyclopropyl group, a n- butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a n-pentyl group, a cyclopentyl group, a n-hexyl group, a cyclohexyl group, a n-heptyl group, and a n-octyl group.
- alkenyl group examples thereof include alkenyl groups containing preferably from 2 to 15 carbon atoms, more preferably from 2 to 12 carbon atoms, further more preferably from 2 to 8 carbon atoms, which may be straight, branched, or cyclic. Specific examples thereof include a vinyl group and an allyl group.
- aryl group examples thereof include aryl groups containing preferably from 6 to 18 carbon atoms, more preferably from 6 to 8 carbon atoms, and specific examples thereof include a phenyl group, a methylphenyl group, and a dimethylphenyl group.
- aralkyl group examples thereof include aralkyl groups containing preferably from 7 to 19 carbon atoms, more preferably from 7 to 8 carbon atoms, and specific examples thereof include a benzyl group and a methylbenzyl group.
- alkoxy group examples thereof include alkoxy groups containing preferably from, for example, 1 to 15 carbon atoms, more preferably from 1 to 12 carbon atoms, further more preferably from 1 to 8 carbon atoms, which may be straight, branched, or cyclic. Specific examples thereof include a methoxy group, an ethoxy group, an isopropoxy group, and a tert-butoxy group.
- amino group examples thereof include amino groups wherein two hydrogen atoms on the nitrogen atom are replaced by the above-described alkyl group or silyl group, and specific examples thereof include a diisopropylamino group, a dicyclohexylamino group, and a bis(trimethylsilyl)amino group.
- the two alkyl groups on the nitrogen atom of the amino group may be connected to each other to form a ring, and specific examples thereof include a 2,2,6,6-tetramethylpiperidin-l-yl group, and the like.
- Specific examples of the halogeno group include a chloro group, a bromo group, and an iodo group.
- organic magnesium bases include those organic magnesium bases wherein R 12 represents a hydrocarbyl group and R 13 represents a halogeno group, that is, Grignard reagents.
- Grignard reagents to be used in the production process of the present invention examples thereof include Grignard reagents containing preferably from 1 to 15 carbon atoms, more preferably from 1 to 12 carbon atoms, futher more preferably from 1 to 8 carbon atoms.
- methylmagnesium chloride methylmagnesium bromide, methylmagnesium iodide, ethylmagnesium chloride, ethylmagnesium bromide, n-propylmagnesium bromide, isopropylmagnesium chloride, isopropylmagnesium bromide, cyclopropylmagnesium bromide, n-butylmagnesium chloride, isobutylmagnesium bromide, sec- butylmagnesium bromide, tert-butylmagnesium chloride, n-pentylmagnesium bromide, cyclopentylmagnesium bromide, n-hexylmagnesium bromide, cyclohexylmagnesium bromide, n-heptylmagnesium bromide, n-octylmagnesium bromide, vinylmagnesium bromide, allylmagnesium chloride,
- the magnesium bases in the production process of the invention may be used independently or in a proper combination of two or more thereof.
- the amount of the magnesium salt to be used is not particularly limited, but is properly selected within the range of usually from 0.3 to 10 equivalents, preferably from 0.5 to 5 equivalents, more preferably from 0.8 to 3 equivalents, per mol of the hydrogen atom on the nitrogen atom of the NH-azole.
- method of adding the magnesium base is not particularly limited, and the magnesium base and the NH-azole may independently be added to the reaction system, the magnesium base and the NH- azole may previously be mixed in a solvent outside the reaction system and added to the reaction system, or they may be added as a magnesium amide synthesized by the reaction between the magnesium base and the NH-azole.
- Examples of such a magnesium amide include (lH-pyrrol-l-yl)magnesium chloride, methyl(lH-pyrrol-l- yl)magnesium, bis(lH-pyrrol-l-yl)magnesium, (indol-l-yl)magnesium chloride, (indol- l-yl)magnesium chloride-N,N,N',N'-tetramethylethylenediamine complex, (indol-1- yl)magnesium hydroxide, (indol-l-yl)magnesium hexamethyldisilazide, (9H-carbazol- 9-yl)magnesium bromide, (9H-carbazol-9-yl)ethylmagnesium, bis(9H-carbazol-9- yl)magnesium-tetrahydrofuran complex, and (9H-carbazol-9-yl)(2,2,6,6- tetramethylpiperidin-
- the production process of the invention is preferably conducted in the presence of a solvent.
- the solvent is not particularly limited as long as it does not participate in the reaction of the production process of the invention.
- preferred specific examples of the solvent include aliphatic hydrocarbons such as pentane, hexane, heptane, octane, decane, dodecane, undecane, cyclohexane, and decaline; aromatic hydrocarbons such as benzene, toluene, xylene, mesitylene, p-cymene, and
- diisopropylbenzene tertiary alcohols such as tert-butanol and 2-methyl-2-butanol
- ethers such as diethyl ether, diisopropyl ether, tert-butyl methyl ether, cyclopentyl methyl ether, dimethoxyethane, ethylene glycol diethyl ether, tetrahydrofuran (THF), and 1,4-dioxane
- amides such as formamide, ⁇ , ⁇ -dimethylformamide, and N,N- dimethylacetamide; and water.
- particularly preferred solvents include aliphatic hydrocarbons such as pentane, hexane, heptane, octane, decane, dodecane, undecane, cyclohexane, and decaline; aromatic hydrocarbons such as benzene, toluene, xylene, mesitylene, p- cymene, and diisopropylbenzene; and ethers such as diethyl ether, diisopropyl ether, tert-butyl methyl ether, cyclopentyl methyl ether, dimethoxyethane, ethylene glycol diethyl ether, THF, and 1 ,4-dioxane.
- aliphatic hydrocarbons such as pentane, hexane, heptane, octane, decane, dodecane, undecane, cyclohexane, and decaline
- solvents may be used independently or in a proper combination of two or more thereof.
- the amount of the solvent to be used is not particularly limited as long as the reaction in the production process of the invention sufficiently proceeds, but is properly selected within the range of usually from 0.5 to 200 times by volume, preferably from 1 to 100 times by volume, more preferably from 2 to 50 times by volume based on the weight of the NH-azole.
- the reaction temperature is not particularly limited, but is properly selected within the range of from 5 to 300°C, preferably from 10 to 200°C, more preferably from 25 to 150°C.
- the reaction time naturally varies depending upon kinds of the (hetero)aryl (pseudo)halide and the NH- azole and upon reaction conditions, and is properly selected within the range of from 5 minutes to 72 hours.
- the production process of the invention is preferably conducted in an inert gas atmosphere.
- the inert gas there are specifically illustrated nitrogen and argon.
- the N-(hetero)arylazole obtained by the production process of the invention may be subjected to after-treatment, purification, and isolation, as needed.
- the method of after-treatment examples thereof include, for example, washing of the reaction solution, extraction of the product, filtration of a precipitate, distillation of a solvent, and crystallization by addition of a solvent. These after-treatments may be conducted independently or in combination thereof.
- the method of purification and isolation examples thereof include, for example, decolorization with an adsorbent such as activated carbon or silica gel, column chromatography, distillation, recrystallization, and sublimation. These methods may be conducted independently or in combination thereof.
- GC-2010Plus model apparatus manufactured by Shimadzu Corporation
- InertCap 1 manufactured by GL Sciences
- initial temperature 100°C
- rate of temperature increase 10°C/min
- final temperature 250°C
- measuring time 30 minutes.
- Nuclear magnetic resonance spectroscopy (NMR): GEMINI2000 model apparatus (manufactured by Varian Medical Systems Inc.)
- deuterochloroform (CDC1 3 ) was used as a deuterated solvent in NMR analysis
- tetramethylsilane (0 ppm) was used as an internal standard substance of H NMR
- CDC1 3 itself (77 ppm) was used as an internal standard substance of C NMR
- ⁇ , ⁇ , ⁇ -trifluoro-p-xylene (-64 ppm) was used as an external standard substance of 19 F NMR.
- Allylpalladium(II) chloride dimer [PdCl( -allyl)] 2 ) (5.8 mg, 0.025 mol %) and di-tert-butyl(2,2-diphenyl-l -methyl- l-cyclopropyl)phosphine (cBRIDP) (22.2 mg, 0.1 mol %) were placed into a 50 mL, two-necked, round bottomed flask equipped a gas inlet, and the flask was evacuated and filled with nitrogen.
- cBRIDP di-tert-butyl(2,2-diphenyl-l -methyl- l-cyclopropyl)phosphine
- Carbazole (10.9 g, 65.0 mmol, 1.03 equivalents) and dehydrated xylenes (66 mL) were charged into the flask, and the mixture was cooled to 5°C using an ice bath. Subsequently, to the mixture was added a THF solution of methylmagnesium chloride (MeMgCl) (3.22 mol/L, 20.0 mL, 64.4 mmol, 1.02 equivalents) (containing THF in an amount of 17.3 mL (15.4 g, 213.6 mmol, 3.4 equivalents)) dropwise via the dropping funnel over 10 minutes at such a rate that the temperature of the reaction solution was kept at 20°C or lower, and then the dropping funnel was washed with dehydrated xylenes (11 mL).
- MeMgCl methylmagnesium chloride
- Example 3 Production of N-(4-methylphenyl)carbazole (structural formula (8)) using 2-di-tert-butylphosphino-2',4',6'-triisopropylbiphenyl (tBuXPhos) as a coordination compound The reaction was conducted for 3 hours in the same experimental procedures as in Example 1 except for using tBuXPhos (26.8 mg, 0.1 mol %) as a coordination compound, and then, 14.3 g of N-(4-methylphenyl)carbazole was obtained as a white powder.
- tBuXPhos 2-di-tert-butylphosphino-2',4',6'-triisopropylbiphenyl
- Carbazole (10.9 g, 65.0 mmol, 1.03 equivalents) and dehydrated xylenes (66 mL) were charged into the flask, and the mixture was cooled to 5°C using an ice bath. Subsequently, to the mixture was added a THF solution of MeMgCl (3.22 mol/L, 20.0 mL, 64.4 mmol, 1.02 equivalents) dropwise via the dropping funnel at such a rate that the temperature of the reaction solution was kept at 20°C or lower, and then the dropping funnel was washed with dehydrated xylenes (1 1 mL).
- Carbazole (10.9 g, 65.0 mmol, 1.03 equivalents) and dehydrated xylenes (66 mL) were charged into the flask, and the mixture was cooled to 5°C using an ice bath. Subsequently, to the mixture was added a THF solution of MeMgCl (3.22 mol/L, 20.0 mL, 64.4 mmol, 1.02 equivalents) dropwise via the dropping funnel at such a rate that the temperature of the reaction solution was kept at 20°C or lower, and then the dropping funnel was washed with dehydrated xylenes (1 1 mL).
- N-(2-naphthyl)carbazole was prepared by using an aryl pseudohalide prepared from 2-naphthol which is available inexpensively, in place of hardly available 2- halonaphthalenes (2-chloronaphthalene is not commercially available, and 2- bromonaphthalene is expensive and containing small amount (up to 3%) of 1- bromonaphthalene as an impurity).
- Carbazole (10.9 g, 65.0 mmol, 2.06 equivalents) and dehydrated xylenes (66 mL) were charged into the flask, and the mixture was cooled to 5°C using an ice bath. Subsequently, to the mixture was added a THF solution of MeMgCl (3.22 mol/L, 20.0 mL, 64.4 mmol, 2.04 equivalents) dropwise via the dropping funnel at such a rate that the temperature of the reaction solution was kept at 20°C or lower, and then the dropping funnel was washed with dehydrated xylenes (1 1 mL).
- Carbazole (10.9 g, 65.0 mmol, 3.09 equivalents) and dehydrated xylenes (66 mL) were charged into the flask, and the mixture was cooled to 5°C using an ice bath. Subsequently, to the mixture was added a THF solution of MeMgCl (3.22 mol/L, 20.0 mL, 64.4 mmol, 3.06 equivalents) dropwise via the dropping funnel at such a rate that the temperature of the reaction solution was kept at 20°C or lower, and then the dropping funnel was washed with dehydrated xylenes (1 1 mL).
- organic photoconductors/organic electroluminescent element materials such as mCP, pCP, CBP, 26mCPy and tCP can be produced in a very short time (10 to 15 minutes) and in a high isolated yield (91.2 to 97.6%) by using an extremely small amount of the palladium catalyst (0.1 to 0.2 mol % per mol of a halogen atom in a (hetero)aryl halide).
- Non-Patent Literature 8 reported that, if a magnesium compound is used as a base when Indole which is one kind of NH-azoles and aryl halides are reacted in the presence of a palladium catalyst, C-arylindole (not N-arylindole) is obtained. Thus, the experimentation using indole as NH-azoles was performed. [PdCl(7i-allyl)] 2 (15.6 mg, 0.1 mol %) and cBRIDP (60.2 mg, 0.4 mol %) were placed into a 50 mL, two-necked, round bottomed flask equipped a gas inlet, and the flask was evacuated and filled with nitrogen.
- Example 6 by NaOT3u That is, [PdCl( -allyl)] 2 (5.8 mg, 0.025 mol %) and cBRIDP (22.2 mg, 0.1 mol %) were placed into a 50 mL, two-necked, round bottomed flask equipped a gas inlet, and the flask was evacuated and filled with nitrogen.
- N- (hetero)arylazoles useful as medical or agrochemical products, organic photoconductor materials, organic electroluminescent element materials, or the like can be produced with low cost and high efficiency.
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EP12772819.4A EP2736881B1 (en) | 2011-09-02 | 2012-08-31 | Process for producing n-(hetero)arylazoles |
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WO2019170163A1 (en) | 2018-03-07 | 2019-09-12 | 东莞市均成高新材料有限公司 | Triaryl phosphine ligands, preparation method therefor, and use in catalysing coupling reactions |
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US20140371461A1 (en) | 2014-12-18 |
EP2736881A1 (en) | 2014-06-04 |
JP2013063962A (en) | 2013-04-11 |
US9233922B2 (en) | 2016-01-12 |
CN103917522B (en) | 2016-06-15 |
EP2736881B1 (en) | 2015-10-07 |
JP6046950B2 (en) | 2016-12-21 |
AU2012302599A1 (en) | 2014-03-13 |
CN103917522A (en) | 2014-07-09 |
CA2847119A1 (en) | 2013-03-07 |
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AU2012302599B2 (en) | 2016-09-01 |
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