CN104497021B - There is triazole-Tetrafluoroboric acid copper complex of catalysis 4-methoxyphenylboronic acid and preparation method thereof - Google Patents
There is triazole-Tetrafluoroboric acid copper complex of catalysis 4-methoxyphenylboronic acid and preparation method thereof Download PDFInfo
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- CN104497021B CN104497021B CN201410769214.5A CN201410769214A CN104497021B CN 104497021 B CN104497021 B CN 104497021B CN 201410769214 A CN201410769214 A CN 201410769214A CN 104497021 B CN104497021 B CN 104497021B
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Abstract
The present invention relates to triazole Tetrafluoroboric acid copper complex with catalysis 4 methoxyphenylboronic acids and preparation method thereof, disclose one { [Cu (L)] (BF4)2·0.5H2The preparation method of O} (1) (L=4 (3 (4H 1,2,4 triazole 4 base) phenyl) 4H 1,2,4 triazole) and there is potential using value as being catalyzed 4 methoxyphenylboronic acid coupling reactions.It is to use " hydro-thermal method ", i.e. Cu (BF4)2With L 100oC hydrothermal condition gets off to prepare this coordination compound.The present invention further discloses { [Cu (L)] (BF4)2·0.5H2O} (1) (L=4 (3 (4H 1,2,4 triazole 4 base) phenyl) 4H 1,2,4 triazole) can be as the application in terms of the coupling reaction catalyst of 4 methoxyphenylboronic acids.
Description
The present invention obtains state natural sciences fund general project (21471113), Tianjin Education Commission funded projects
(20140506), Tianjin Normal University's Middl-age and youth faculty Academic innovations advances planning item and Tianjin innovation team of institution of higher education
Training plan subsidizes (TD12-5038).
Technical field
The invention belongs to Inorganic synthese technical field, relate to copper complex { [Cu (L)] (BF4)2·0.5H2O} (1) (L
=4-(3-(4H-1,2,4-triazole-4-yl) phenyl)-4H-1,2,4-triazole) preparation method and as 4-methoxyphenylboronic acid
Application in terms of the catalyst of coupling reaction.
Background technology
A research always active field of high selectivity is carried out with transition metal complex catalysis.With commonly
Synthesizing mean is difficult to the reaction realized, and busy use transition metal complex can a step complete in a mild condition.Therefore, adopt
Make catalyst with metal complex and develop the organic synthesis of high selectivity, high conversion, be the most interesting
Problem.In organic synthesis, general conventional transition metal has nickel, palladium, copper, ruthenium, rhodium, manganese etc., and wherein palladium complex demonstrates many
Sample catalysis.Palladium catalysed cross coupling reaction kind is a lot, and these reactions are at synthesis of natural product, polymer, functional material, liquid
Crystalline substance, drug molecule and bioactive compound all have been widely used.But palladium catalyst is relatively costly, if can be with cheap
Copper complex replaces expensive palladium catalyst, it is achieved the process of reaction, is possible not only to cost-effective, and is expected to industry metaplasia
Produce.
1,2,4-triazole and derivant thereof have the coordination feature of pyrazoles and imidazoles concurrently, are that the bridging that coordination ability is stronger is joined
Body, has synthesized and has characterized substantial amounts of monokaryon, multinuclear and multidimensional compound the most.These parts can be former with the nitrogen on 1,2
Son forms N1, N2-bridging pattern with metallic ion coordination, can be by 2,4 for 4 unsubstituted 1,2,4-triazole derivatives
On nitrogen-atoms formed N2, N4-bridging pattern, this N2, N4-bridging pattern is with the N1 of imidazoles in metalloenzyme, N3-bridging pattern
Similar.Specific use for triazole class compounds is also manifested by the design of molecular device, and synthesis has different dimension
Metal complex has been the vital step of device.
The present invention is i.e. to select Cu (BF4)2With 4-(3-(4H-1,2,4-triazole-4-yl) phenyl)-4H-1,2,4-triazole
(L) 100oC hydrothermal condition gets off to prepare copper complex { [Cu (L)] (BF4)2·0.5H2O} (1).Catalysis experiments proves, should
Coordination compound can be applied as the catalyst of 4-methoxyphenylboronic acid coupling reaction.
Summary of the invention
Offer double triazole copper complex { [Cu (L)] (BF of a kind of isophthalic is provided4)2·
0.5H2O} (1) monocrystalline and preparation method thereof.
Following technical scheme is current inventor provides for this:
Double triazole copper complex { [Cu (L)] (BF of isophthalic4)2·0.5H2O} (1) (L=4-(3-(4H-1,2,4-tri-
Azoles-4-base) phenyl)-4H-1,2,4-triazole) and structural motif as shown in Figure 1.
The present invention further discloses double triazole copper complex { [Cu (L)] (BF of isophthalic4)2·0.5H2O} (1) (L =
4-(3-(4H-1,2,4-triazole-4-yls) phenyl)-4H-1,2,4-triazoles) monocrystalline, it is characterised in that this mono-crystalline structures uses
APEX II CCD single crystal diffractometer, use is incident radiation through graphite monochromatised Mok alpha ray (λ=0.71073),
Withω-2θScan mode collects point diffraction, obtains cell parameter through least square refinement, from difference Fourier electron density
Desire to make money or profit and solve single crystal data with software:
The crystallographic data of table 1. coordination compound 1
Double triazole copper complex { [Cu (L)] (BF of isophthalic of the present invention4)2·0.5H2O} (1) (L = 4-(3-(4H-
1,2,4-triazole-4-yl) phenyl)-4H-1,2,4-triazoles) preparation method of monocrystalline, its feature is using " hydro-thermal method ",
CH3CN and H2In O, by Cu (BF4)2With L ligand 1 00oReact under C hydrothermal condition, obtain being suitable for the yellow of X-ray single crystal diffraction
Rhabdolith.Wherein CH3CN and H2The volume ratio of O is 4:6, Cu (BF4)2It is 1:1 with the mol ratio of L；
The more detailed preparation method of the present invention is as follows:
Double triazole copper complex { [Cu (L)] (BF of a kind of isophthalic4)2·0.5H2O} (1) (L = 4-(3-(4H-1,2,4-
Triazole-4-yl) phenyl)-4H-1,2,4-triazoles) preparation method of monocrystalline, its feature is using " hydro-thermal method ", at CH3CN and H2O
In, by Cu (BF4)2With L ligand 1 00oReact under C hydrothermal condition, obtain being suitable for the yellow rhabdolith of X-ray single crystal diffraction.
Wherein CH3CN and H2The volume ratio of O is 4:6, Cu (BF4)2It is 1:1 with the mol ratio of L；
Solvent of the present invention is mixed solvent, CH3CN and H2O。
Wherein Cu (BF4)2It is 1:1 with the mol ratio of L.
The present invention further discloses the double triazole copper complex of a kind of isophthalic, to have catalysis 4-methoxyphenylboronic acid coupling anti-
The effect answered.
Double triazole copper complex { [Cu (L)] (BF of a kind of isophthalic disclosed by the invention4)2·0.5H2O} (1) (L = 4-
(3-(4H-1,2,4-triazole-4-yl) phenyl)-4H-1,2,4-triazole) monocrystalline have the advantage that and feature be:
(1) operation is simple and easy to do.
(2) reaction yield is high, and the purity of products obtained therefrom is high.
(3) { [Cu (L)] (BF prepared by the present invention4)2·0.5H2O} (1) (L=4-(3-(4H-1,2,4-tri-
Azoles-4-base) phenyl)-4H-1,2,4-triazoles) production cost is low, and method is easy, is suitable for large-scale production.
Accompanying drawing explanation
The crystal structure primitive figure of Fig. 1: coordination compound 1；
The tomograph of Fig. 2: coordination compound 1；
The nuclear-magnetism figure of Fig. 3: 4,4'-dimethoxy-biphenyl.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described further, and embodiment is only explanatory, is in no way intended to it
Limit the scope of the present invention by any way.All of raw material is all to buy from chemical reagents corporation both domestic and external, does not has
Through continuation purification but directly use.Wherein Cu (BF4)2, CH3CN is by commercially available.
Embodiment 1
The preparation of 4-(3-(4H-1,2,4-triazole-4-yl) phenyl)-4H-1,2,4-triazole (L) part
It is separately added into m-diaminobenzene. (1 in equipped with 50 mL three neck round bottom flasks of magneton, reflux condenser and thermometer
Mmol), double formylhydrazines (2 mmol), start and stir at 100 DEG C, react 12 hours.After reaction terminates, reactant liquor is down to room
Temperature, separates out a large amount of precipitation, by precipitation water and ethyl alcohol recrystallization, yield 86%.Elementary analysis C10H8N6Theoretical value: C, 56.60；
H, 3.80；N, 39.60.Experiment value: C, 56.56；H, 3.75；N, 39.56.M-diaminobenzene., the mol ratio of double formylhydrazines is 1:2.
Embodiment 2
Cu(BF4)2With 4-(3-(4H-1,2,4-triazole-4-yl) phenyl)-4H-1,2,4-triazole) mol ratio of (L) is
1:1；
L (0.0424 g, 0.2 mmol), Cu (BF4)2(0.0691 g, 0.2 mmol), H2O (6 mL), CH3CN
(4 mL), hydro-thermal 100oC was slowly dropped to room temperature after tri-days.The yellow having applicable X-ray single crystal diffraction to analyze after driving still is bar-shaped
Crystal.Productivity: 35% (calculating based on L).Elementary analysis (C10H9BCuF4N6O0.5) theoretical value (%): C, 32.32；H, 2.44；N,
22.62.Measured value: C, 32.35；H, 2.46；N, 22.69.
Embodiment 3
Crystal structure determination uses APEX II CCD single crystal diffractometer, use through graphite monochromatised Mok alpha ray (λ=
0.71073) it is incident radiation, withω-2θScan mode collects point diffraction, obtains structure cell ginseng through least square refinement
Number, utilizes software to solve crystal structure from difference Fourier electron density map, and through Lorentz lorentz and polarity effect correction.All of
H atom is synthesized by difference Fourier and determines through preferable position calculation.Detailed axonometry data are shown in Table 1.Structural motif is shown in
Fig. 1, the three dimensional structure of coordination compound is shown in Fig. 2.
The crystallographic data of table 1 coordination compound 1
Embodiment 4
Cu(BF4)2With 4-(3-(4H-1,2,4-triazole-4-yl) phenyl)-4H-1,2,4-triazole) mol ratio of (L) is 1:
1；
We also attempted other ratios, such as Cu (BF4)2With-(3-(4H-1,2,4-triazole-4-yl) phenyl)-4H-1,
2,4-triazoles) mol ratio be 2:1, the most no matter the length of hydro-thermal reaction time, all can not get crystalline compound.Therefore Cu
(BF4)2With-(3-(4H-1,2,4-triazole-4-yl) phenyl)-4H-1,2,4-triazole) mol ratio be 1:1 be that optimum response is joined
Ratio.
Embodiment 5
A research always active field of high selectivity is carried out with transition metal complex catalysis.With commonly
Synthesizing mean is difficult to the reaction realized, and busy use transition metal complex can a step complete in a mild condition.Therefore, adopt
Make catalyst with metal complex and develop the organic synthesis of high selectivity, high conversion, be the most interesting
Problem.In organic synthesis, general conventional transition metal has nickel, palladium, copper, ruthenium, rhodium, manganese etc., and wherein palladium complex demonstrates many
Sample catalysis.Palladium catalysed cross coupling reaction kind is a lot, and these reactions are at synthesis of natural product, polymer, functional material, liquid
Crystalline substance, drug molecule and bioactive compound all have been widely used.But palladium catalyst is relatively costly, if can be with cheap
Copper complex replaces expensive palladium catalyst, it is achieved the process of reaction, is possible not only to cost-effective, and is expected to industry metaplasia
Produce.
1,2,4-triazole and derivant thereof have the coordination feature of pyrazoles and imidazoles concurrently, are that the bridging that coordination ability is stronger is joined
Body, has synthesized and has characterized substantial amounts of monokaryon, multinuclear and multidimensional compound the most.These parts can be former with the nitrogen on 1,2
Son forms N1, N2-bridging pattern with metallic ion coordination, can be by 2,4 for 4 unsubstituted 1,2,4-triazole derivatives
On nitrogen-atoms formed N2, N4-bridging pattern, this N2, N4-bridging pattern is with the N1 of imidazoles in metalloenzyme, N3-bridging pattern
Similar.Specific use for triazole class compounds is also manifested by the design of molecular device, and synthesis has different dimension
Metal complex has been the vital step of device.
The present invention is i.e. to select Cu (BF4)2With 4-(3-(4H-1,2,4-triazole-4-yl) phenyl)-4H-1,2,4-triazole
(L) 100oC hydrothermal condition gets off to prepare copper complex { [Cu (L)] (BF4)2·0.5H2O} (1).Catalysis experiments proves, should
Coordination compound can be applied as the catalyst of 4-methoxyphenylboronic acid coupling reaction.
1 g 4-methoxyphenylboronic acid, 0.2 g Cs is weighed in 25 mL beakers2CO3, 3 mL DMF and 0.1 g catalyst
(coordination compound 1), stirs 1 hour under room temperature, and TLC monitoring (PE:EA=1:1) reaction is complete, 10 mL CH2Cl2After extracted products
Again with 20 mL distilled water washs, organic facies sewage MgSO4Being dried, filter, precipitation, the thick product obtained is with petroleum ether eluting
Cross post, obtain 4,4'-dimethoxy-biphenyl.
Claims (2)
1. the double triazole copper complex monocrystalline of isophthalic preparation as in terms of the coupling reaction catalyst of 4-methoxyphenylboronic acid should
With, it is characterised in that the double triazole copper complex mono-crystalline structures of described isophthalic uses APEX II CCD single crystal diffractometer, uses warp
Crossing graphite monochromatised Mok alpha ray, λ=0.71073 is incident radiation, withω-2θScan mode collects point diffraction, warp
Cross least square refinement and obtain cell parameter, utilize software to solve single crystal data from difference Fourier electron density map:
The molecular formula of the double triazole copper complex monocrystalline of described isophthalic: [Cu (L)] (BF4)2·0.5H2O, wherein L=4-(3-
(4H-1,2,4-triazole-4-yl) phenyl)-4H-1,2,4-triazole.
2. the application described in claim 1, it is characterised in that the method for described 4-methoxyphenylboronic acid coupling reaction is as follows:
4-methoxyphenylboronic acid 4,4'-dimethoxy-biphenyl
1 g 4-methoxyphenylboronic acid, 0.2 g Cs is weighed in 25 mL beakers2CO3, the catalysis of 3 mL DMF and 0.1 g is joined
Compound monocrystalline, stirs 1 hour under room temperature, and TLC monitors, 10 mL CH2Cl2Again with 20 mL distilled water washs after extracted products, have
Anhydrous MgSO used mutually by machine4Being dried, filter, precipitation, the thick product obtained strips post with petroleum ether, obtains 4,4'-dimethoxy
Biphenyl.
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Non-Patent Citations (4)
| Title |
|---|
| Aerobic homocoupling of arylboronic acids catalysed by copper terephthalate metal–organic frameworks;Kasi Pitchumani et al.;《Green Chemistry》;20140224;第16卷;第2865-2875页 * |
| Clay encapsulated Cu(OH)xpromoted homocoupling of arylboronic acids: An efficient and eco-friendly protocol;Baldev Singh et al.;《Applied Catalysis A:General》;20131108;第470卷;第232-238页 * |
| Homocoupling of Arylboronic Acids Catalyzed by 1,10-Phenanthroline-Ligated Copper Complexes in Air;N Kirai et al.;《Eur. J. Org. Chem.》;20091231;第12卷;第1864-1867页 * |
| Synthesis，Crystal Structure，and Properties of a 3D Cu(I) Coordination Polymer Based on Cu3(CN)2 Clusters and 1,3-Di-(1,2,4-Triazole-4-yl)Benzene;Shao-Bin Miao et al.;《J Clust Sci.》;20140202;第25卷;第1137-1145页 * |
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