CN106311330B - Ion pair type rare-earth metal catalyst and its preparation method and application - Google Patents

Ion pair type rare-earth metal catalyst and its preparation method and application Download PDF

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CN106311330B
CN106311330B CN201610711320.7A CN201610711320A CN106311330B CN 106311330 B CN106311330 B CN 106311330B CN 201610711320 A CN201610711320 A CN 201610711320A CN 106311330 B CN106311330 B CN 106311330B
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earth metal
ion pair
metal catalyst
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CN106311330A (en
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周双六
王伟
张丽军
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Anhui Normal University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/18Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms
    • B01J31/1805Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms the ligands containing nitrogen
    • B01J31/181Cyclic ligands, including e.g. non-condensed polycyclic ligands, comprising at least one complexing nitrogen atom as ring member, e.g. pyridine
    • B01J31/1815Cyclic ligands, including e.g. non-condensed polycyclic ligands, comprising at least one complexing nitrogen atom as ring member, e.g. pyridine with more than one complexing nitrogen atom, e.g. bipyridyl, 2-aminopyridine
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/22Organic complexes
    • B01J31/2204Organic complexes the ligands containing oxygen or sulfur as complexing atoms
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2231/00Catalytic reactions performed with catalysts classified in B01J31/00
    • B01J2231/30Addition reactions at carbon centres, i.e. to either C-C or C-X multiple bonds
    • B01J2231/34Other additions, e.g. Monsanto-type carbonylations, addition to 1,2-C=X or 1,2-C-X triplebonds, additions to 1,4-C=C-C=X or 1,4-C=-C-X triple bonds with X, e.g. O, S, NH/N
    • B01J2231/3411,2-additions, e.g. aldol or Knoevenagel condensations
    • B01J2231/342Aldol type reactions, i.e. nucleophilic addition of C-H acidic compounds, their R3Si- or metal complex analogues, to aldehydes or ketones
    • B01J2231/343Aldol type reactions, i.e. nucleophilic addition of C-H acidic compounds, their R3Si- or metal complex analogues, to aldehydes or ketones to prepare cyanhydrines, e.g. by adding HCN or TMSCN
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07BGENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
    • C07B2200/00Indexing scheme relating to specific properties of organic compounds
    • C07B2200/13Crystalline forms, e.g. polymorphs

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  • Inorganic Chemistry (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
  • Catalysts (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The invention discloses a kind of ion pair type rare-earth metal catalysts and its preparation method and application, the structure such as formula (I) of the ion pair type rare-earth metal catalyst or (II) are shown, wherein, in above formula, R is selected from the alkyl of H, C1-C6 or the oxyl of C1-C6, and RE is selected from scandium, yttrium or lanthanide element.The ion pair type rare-earth metal catalyst as made from this method can be catalyzed trimethyl silicane nitrile to the nucleophilic addition of carbonyls under mild conditions, and reaction efficiency height and environmentally protective;In addition, the method for preparation ion pair type rare-earth metal catalyst has the characteristics that the yield of simple step, mild condition, reaction rate and product is higher,

Description

Ion pair type rare-earth metal catalyst and its preparation method and application
Technical field
The present invention relates to rare-earth metal catalysts, and in particular, to ion pair type rare-earth metal catalyst and its preparation side Method and application.
Background technique
α-cyanalcohol is a kind of organic synthesis intermediate for having and value being widely applied, is passed through due to its polyfunctional group structure Further reaction can synthesize the compounds such as a-amino acid or 'alpha '-hydroxy acids.Industrial production cyanalcohol mainly uses hydrogen cyanide to carbonyl It is prepared by the nucleophilic addition of compound.This method uses the hydrogen cyanide of severe toxicity as nucleopilic reagent.It compares, passes through trimethyl The nucleophilic addition of cyanogen silane (TMSCN) and aldehydes or ketones obtains cyanalcohol using hydrolysis can be to avoid the cyaniding for using severe toxicity Hydrogen industrially has significant application value.But the nucleophilic addition of existing trimethylsilyl cyanide (TMSCN) and aldehydes or ketones There is the disadvantages of needing catalytic amount big, catalytic efficiency is not high and needs using organic solvent in reaction.
Summary of the invention
The object of the present invention is to provide a kind of ion pair type rare-earth metal catalysts and its preparation method and application, by this Ion pair type rare-earth metal catalyst made from method can be catalyzed trimethyl silicane nitrile to carbonyls under mild conditions Nucleophilic addition, and reaction efficiency height and environmentally protective;In addition, the method for preparation ion pair type rare-earth metal catalyst Have the characteristics that the yield of simple step, mild condition, reaction rate and product is higher.
To achieve the goals above, the present invention provides a kind of ion pair type rare-earth metal catalyst, the ion pair type is dilute The structure of earth metal catalyst such as formula (I) or (II) are shown,
Wherein, in above formula, R is selected from the alkyl of H, C1-C6 or the oxyl of C1-C6, and RE is selected from scandium, yttrium or lanthanide series metal member Element.
The present invention also provides a kind of preparation method of above-mentioned ion pair type rare-earth metal catalyst, the preparation methods Are as follows: it, will be the ligand one of the structure as shown in formula (III), the structure as shown in formula (V) in the presence of organic solvent and protection gas [(Me3Si)2N]3RE(μ-Cl)Li(THF)3Complexation reaction is carried out so that the ion pair type rare earth gold of the structure as shown in formula (I) is made Metal catalyst;
Alternatively, organic solvent and protection gas in the presence of, will the structure as shown in formula (IV) ligand two, such as formula (V) institute Show the [(Me of structure3Si)2N]3RE(μ-Cl)Li(THF)3Complexation reaction is carried out so that the ion pair of the structure as shown in formula (II) is made Type rare-earth metal catalyst;
Wherein, R is selected from the alkyl of H, C1-C6 or the oxyl of C1-C6, and RE is selected from scandium, yttrium or lanthanide element.
Invention further provides a kind of above-mentioned ion pair type rare-earth metal catalysts in catalysis trimethyl silicane nitrile pair Application in the nucleophilic addition of carbonyls.
Through the above technical solutions, one aspect of the present invention passes through [(Me3Si)2N]3RE(μ-Cl)Li(THF)3With ligand one Or ligand two carries out the ion pair type rare-earth metal catalyst that the structure as shown in formula (I) or (II) is made in complexation reaction;It is another Aspect is catalyzed trimethyl silicane nitrile to the nucleophilic addition of carbonyls using ion pair type rare-earth metal catalyst, and then To preparing α-cyanalcohol intermediate.In addition, the nucleophilic addition has the advantages that reaction efficiency height and environmentally protective;Meanwhile The method for preparing ion pair type rare-earth metal catalyst has the yield of simple step, mild condition, reaction rate and product equal Higher feature.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the single crystal diffraction figure of catalyst II-2 in embodiment 2.
Specific embodiment
Detailed description of the preferred embodiments below.It should be understood that described herein specific Embodiment is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
The present invention provides a kind of ion pair type rare-earth metal catalyst, the structures of the ion pair type rare-earth metal catalyst As shown in formula (I) or (II),
Wherein, in above formula, R is selected from the alkyl of H, C1-C6 or the oxyl of C1-C6, and RE is selected from scandium, yttrium or lanthanide series metal member Element.
In the present invention, the selection within the above range of R and RE, but consider from the yield of preparation, it is preferable that R choosing From the alkyl of H, C1-C3 or the oxyl of C1-C3, RE is selected from scandium, yttrium or lanthanide element;It is highly preferred that R is selected from H, C1- The alkyl of C3 or the oxyl of C1-C3, RE are selected from scandium, yttrium or lanthanide element;It is further preferred that R be H, RE be selected from Er, Sm, Dy or Y.
The present invention also provides a kind of preparation method of above-mentioned ion pair type rare-earth metal catalyst, the preparation methods Are as follows: it, will be the ligand one of the structure as shown in formula (III), the structure as shown in formula (V) in the presence of organic solvent and protection gas [(Me3Si)2N]3RE(μ-Cl)Li(THF)3Complexation reaction is carried out so that the ion pair type rare earth gold of the structure as shown in formula (I) is made Metal catalyst;
Alternatively, organic solvent and protection gas in the presence of, will the structure as shown in formula (IV) ligand two, such as formula (V) institute Show the [(Me of structure3Si)2N]3RE(μ-Cl)Li(THF)3Complexation reaction is carried out so that the ion pair of the structure as shown in formula (II) is made Type rare-earth metal catalyst;
Wherein, R is selected from the alkyl of H, C1-C6 or the oxyl of C1-C6, and RE is selected from scandium, yttrium or lanthanide element.
In this preparation method, the selection within the above range of R and RE, but consider from the yield of product, it is preferable that R is selected from the alkyl of H, C1-C3 or the oxyl of C1-C3, and RE is selected from scandium, yttrium or lanthanide element;It is highly preferred that R be selected from H, The alkyl of C1-C3 or the oxyl of C1-C3, RE are selected from scandium, yttrium or lanthanide element;It is further preferred that R is H, RE is selected from Er, Sm, Dy or Y.
In the present invention, the dosage of each material can select in a wide range, but in order to further increase yield, it is excellent Selection of land, relative to 1mmol [(Me3Si)2N]3RE(μ-Cl)Li(THF)3, the dosage of ligand one or ligand two is 2- 2.5mmol;It is highly preferred that relative to 1mmol [(Me3Si)2N]3RE(μ-Cl)Li(THF)3, the dosage of organic solvent is 15- 25mL。
In the above preparation method, the actual conditions of complexation reaction can select in a wide range, but in order into one Step improves yield, it is preferable that complexation reaction at least meets the following conditions: reaction temperature is 45-55 DEG C, reaction time 12- 24h。
Meanwhile in the present invention, the specific type of organic solvent and protection gas can select in a wide range, but be Further increase yield and reaction rate, it is preferable that organic solvent be selected from n-hexane, tetrahydrofuran and toluene one kind or It is a variety of;It is highly preferred that protection gas is selected from one of helium, nitrogen and argon gas or a variety of.
Invention further provides a kind of above-mentioned ion pair type rare-earth metal catalysts in catalysis trimethyl silicane nitrile pair Application in the nucleophilic addition of carbonyls.
In above-mentioned application, the dosage of ion pair type rare-earth metal catalyst can select in a wide range, but be It further increases catalytic effect and reduces cost, it is preferable that relative to the carbonyls of 1mmol, ion pair type rare earth The dosage of metallic catalyst is 0.0001-0.01mmol, more preferably 0.002-0.01mmol.
In above-mentioned application, the dosage of raw material can select in a wide range, but in order to further increase yield, it is excellent Selection of land, relative to the carbonyls of 1mmol, the dosage of trimethyl silicane nitrile is 1-1.5mmol.
In addition, the specific reflection condition of nucleophilic addition can select in a wide range, but in order to improve reaction Yield, it is preferable that nucleophilic addition at least meets the following conditions: reaction temperature be 20-30 DEG C, reaction time 2-6h.
In addition, the specific type of carbonyls can select in a wide range in above-mentioned application, but in order into One step improves the yield of reaction, it is preferable that carbonyls is selected from ketone compounds or aldehyde compound;It is highly preferred that carbonyl Based compound is selected from alkanones compound, alicyclic ring ketone compounds, aromatic ketone compounds or heterocyclic ketones;Into one Step preferably, carbonyls be 3- methyl -2- butanone, cyclohexanone, cyclopentanone, acetophenone, melilotal, to chlorobenzene second Ketone, parabromoacetophenone, p-nitroacetophenone, o-methyl-benzene ethyl ketone, o-chloroacetophenone, ortho-nitroacetophenone, m-nitroacetophenone, Meta-methoxy acetophenone, 2- acetonaphthone, 2- acetylpyridine.
On the basis of above-mentioned content, the specific type of organic solvent and protection gas can select in a wide range, But in order to further increase the yield of nucleophilic addition and reaction rate, it is preferable that in the system of nucleophilic addition In further include organic solvent;It is highly preferred that organic solvent is selected from one of n-hexane, tetrahydrofuran and ether or a variety of.Its In, the dosage of organic solvent can select in a wide range, but in order to further control cost and environmental protection, more preferably instead It can should carry out under solvent-free conditions.
Finally, in the present invention, all THF refer to tetrahydrofuran.
The structure for catalyzed by rare-earth complex agent that the present invention will be described in detail by way of examples below is in SMART Diffraction data is collected on CCD diffractometer.Using the MoK alpha ray of graphite monochromatic, T=293 (2) K, ω are swept Technology is retouched, whole intensity datas are through Lp factor calibration, and using 5.03 program of SHELXTL, crystal structure uses heavy-atom method solution Out, whole non-hydrogen atom coordinate parameters are obtained after being taken turns Fourier transformation more, theoretical hydrogenation method obtains all hydrogen atom coordinates, Anisotropic temperature factor is corrected through complete matrix least square method (SHELXS-97) to all non-hydrogen atoms;Elemental analysis passes through Perkin-Elmer Model 2400Series II elemental analyzer is measured.
Intermediate [(Me used in embodiment3Si)2N]3RE(μ-Cl)Li(THF)3(RE is yttrium and lanthanide series metal) is ginseng Examine document that Wang Shaowu et al. publishes (E.H.Sheng, S.W.Wang, G.S.Yang, S.L.Zhou, L.Cheng, K.H.Zhang, Z.X.Huang.Organometallics 2003,22,684) in method be prepared.
Preparation example 1
The preparation of the ligand one of the structure as shown in formula (III):
At 25 DEG C, 1,2- diphenyl ethylene diamine (5.31g, 25.0mmol) is dissolved in 30mL dehydrated alcohol, then plus Enter 2- pyrrole aldehyde (5.46g, 50mmol), stirring makes it completely dissolved, and the p-methyl benzenesulfonic acid of catalytic amount is then added, 4 is small When after a large amount of light yellow solids are precipitated in reaction solution, crude product is obtained by filtration, is finally recrystallized to give with dehydrated alcohol light yellow Solid (7.32g, yield 80%).
The characterization result of product are as follows:1H NMR(500MHz,CDCl3):δ7.84(s,2H),7.13-7.03(m,10H), 7.76(s,2H),7.28-7.27(m,2H),6.28-6.27(m,2H),6.09-6.07(m,2H),4.56(s,2H).13C NMR (125MHz,CDCl3):δ152.9,142.2,130.7,128.4,127.2,122.1,114.9,110.0,80.7.HR-MS (ESI)Calcd.For C24H22N4[M+H+]:367.1917,found:367.1913.
Preparation example 2
The preparation of the ligand one of the structure as shown in formula (IV):
At 25 DEG C, by (1R, 2R) -1,2- diphenyl ethylene diamine (5.31g, 25.0mmol) is dissolved in 30mL dehydrated alcohol In, then be added 2- pyrrole aldehyde (5.46g, 50mmol), stirring makes it completely dissolved, then be added catalytic amount to methylbenzene A little floccule is precipitated in sulfonic acid in reaction solution after 4 hours, which is spin-dried on a rotary evaporator, again with methylene chloride Secondary dissolution is eventually adding saturated sodium carbonate extraction and removes a small amount of p-methyl benzenesulfonic acid, solvent finally is drained in organic phase concentration Obtain light yellow powder solid (7.78g, yield 85%).
The characterization result of product are as follows: 1H NMR (500MHz, CDCl3): δ 7.84 (s, 2H), 7.13-7.03 (m, 10H), 7.76(s,2H),7.28-7.27(m,2H),6.28-6.27(m,2H),6.09-6.07(m,2H),4.56(s,2H).
Embodiment 1
The preparation of ion pair type rare-earth metal catalyst I-1:
Under protection of argon gas, by [(Me3Si)2N]3Er(μ-Cl)Li(THF)3Two neck bottles are added in (0.95g, 1.05mmol) In, compound III-1 (0.77g, 2.10mmol) then is added, adds the THF (tetrahydrofuran) of 20mL, it is anti-under the conditions of 50 DEG C It answers solution after 12h to become light brown, then drains the mixed solution, n-hexane washing, export n-hexane and vacuum pumping is added It does to powdered, is eventually adding 10mL toluene and extracts recrystallization, stand 2 days under the conditions of -5 DEG C, obtain light brown rhombohedral crystal (0.81g, yield 65%).
The characterize data of product are as follows: IR (KBr pellets, cm-1):ν3458(s),1631(s),1597(m),1392 (w),1311(m),1267(m),1031(s),974(m),740(w),700(m).Anal.Calcd for ErC64H72N8O4Li: C,64.51;H,6.09;N,9.40;Found:C,63.63;H,5.69;N,9.53.
Embodiment 2
The preparation of ion pair type rare-earth metal catalyst I-2:
It carries out that light brown rhomboidan (0.93g, yield 69%) is made according to the method for embodiment 1, except that will [(Me3Si)2N]3Er(μ-Cl)Li(THF)3(0.95g, 1.05mmol) is changed to [(Me3Si)2N]3Sm(μ-Cl)Li(THF)3 The dosage of compound III-1 is changed to 2.30mmol by (1.02g, 1.15mmol).
The characterize data of product are as follows: IR (KBr pellets, cm-1):ν3421(s),1629(s),1593(s),1421 (m),1311(m),1031(m),738(w),700(m).Anal.Calcd for SmC64H72N8O4Li:C,65.44;H,6.18; N,9.54;Found:C,64.98;H,5.48;N,9.85.
Embodiment 3
The preparation of ion pair type rare-earth metal catalyst I-3:
It carries out that light brown rhomboidan (0.69g, yield 58%) is made according to the method for embodiment 1, except that will [(Me3Si)2N]3Er(μ-Cl)Li(THF)3(0.95g, 1.05mmol) is changed to [(Me3Si)2N]3Dy(μ-Cl)Li(THF)3 The dosage of compound III-1 is changed to 2.00mmol by (0.90g, 1.00mmol).
The characterize data of product are as follows: IR (KBr pellets, cm-1):ν3481(s),2360(s),1629(s),1597 (m),1390(w),1311(m),1031(m),974(m),738(w),700(m).Anal.Calcd for SmC64H72N8O4Li: C,64.77;H,6.12;N,9.44;Found:C,64.72;H,5.72;N,9.43.
Embodiment 4
The preparation of ion pair type rare-earth metal catalyst II-1:
It carries out that light brown rhomboidan (0.55g, yield 46%) is made according to the method for embodiment 1, except that will [(Me3Si)2N]3Er(μ-Cl)Li(THF)3(0.95g, 1.05mmol) is changed to [(Me3Si)2N]3Y(μ-Cl)Li(THF)3 Compound III-1 is changed to compound IV-1 (0.88g, 2.40mmol) by (0.99g, 1.20mmol).
The characterize data of product are as follows:1H NMR(500MHz,C4D8O):δ8.00(s,4H),7.32-7.00(m,20H), 6.89(s,4H),6.35(s,4H),6.05(m,4H),4.78(s,4H).13C NMR(75MHz,C4D8O):δ140.4,127.3, 126.3,126.1,125.7,124.5,120.6,113.5,106.9,77.6,65.3,65.1,64.8,64.5,64.2,63.9, 23.5,23.0,22.7,22.4,22.2,21.9,0.16.IR(KBr pellets,cm-1):ν3473(s),2360(s),1616 (s),1595(m),1431(w),1388(w),1031(m),972(m),700(s),609(s).
Embodiment 5
The preparation of ion pair type rare-earth metal catalyst II-2:
It carries out that light brown rhomboidan (0.60g, yield 50%) is made according to the method for embodiment 1, except that will [(Me3Si)2N]3Er(μ-Cl)Li(THF)3(0.95g, 1.05mmol) is changed to [(Me3Si)2N]3Sm(μ-Cl)Li(THF)3 Compound III-1 is changed to compound IV-1 (0.85g, 2.32mmol) by (1.03g, 1.16mmol).
The characterize data of product are as follows: IR (KBr pellets, cm-1):ν3415(s),2364(s),1624(s),1595 (m),1388(w),1033(m),1029(m),698(s),609(s).
Embodiment 6
The preparation of ion pair type rare-earth metal catalyst II-3:
It carries out that light brown rhomboidan (0.42g, yield 42%) is made according to the method for embodiment 1, except that will [(Me3Si)2N]3Er(μ-Cl)Li(THF)3Dosage be changed to 1.08mmol, compound III-1 is changed to compound IV-1 (0.79g,2.16mmol)。
The characterize data of product are as follows: IR (KBr pellets, cm-1):ν3473(s),2360(s),1620(s),1598 (m),1390(w),1311(m),1029(m),700(s),609(s).Anal.Calcd for ErC50H46N8Li:C,64.52; H,5.41;N,11.15;Found:C,64.20;H,5.48;N,10.72.
Application examples 1
At argon gas protection and 25 DEG C, rare earth metal complex and acetophenone compound are added in the reaction flask of 50mL (1.0mmol) stirs 2-3 minutes, adds trimethyl silicane nitrile (1.2mmol), after reaction, filters, and yield is 99 weights The product for measuring % can be directly obtained by being concentrated in vacuo liquid phase, remaining product obtains purified product by column chromatography for separation, stream Dynamic is mutually ethyl acetate: petroleum ether=1:10;It specifically the results are shown in Table 1.
Table 1
Application examples 2
At argon gas protection and 25 DEG C, it is added in the reaction flask of 50mL catalyst I-1 (0.0001mmol) and various Ketone compound (1.0mmol) is stirred 2-3 minutes, is added trimethyl silicane nitrile (1.2mmol), after reacting 4h, filtering, and yield It can be directly obtained by being concentrated in vacuo liquid phase for the product of 99 weight %, remaining product obtains purifying by column chromatography for separation and produces Object, mobile phase are ethyl acetate: petroleum ether=1:10, concrete outcome are shown in Table 2.
Table 2
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally The thought of invention, it should also be regarded as the disclosure of the present invention.

Claims (17)

1. a kind of ion pair type rare-earth metal catalyst, which is characterized in that the structure of the ion pair type rare-earth metal catalyst As shown in formula (I) or (II),
Wherein, in above formula, R H, RE are selected from scandium, yttrium or lanthanide element.
2. ion pair type rare-earth metal catalyst according to claim 1, wherein the R be H, the RE be selected from Er, Sm, Dy or Y.
3. a kind of preparation method of ion pair type rare-earth metal catalyst as described in claim 1, which is characterized in that the system Preparation Method are as follows: organic solvent and protection gas in the presence of, will the structure as shown in formula (III) ligand one, as shown in formula (V) knot [(the Me of structure3Si)2N]3RE(μ-Cl)Li(THF)3The ion pair type that complexation reaction is carried out so that the structure as shown in formula (I) is made is dilute Earth metal catalyst;
Alternatively, organic solvent and protection gas in the presence of, will the structure as shown in formula (IV) ligand two, as shown in formula (V) knot [(the Me of structure3Si)2N]3RE(μ-Cl)Li(THF)3The ion pair type that complexation reaction is carried out so that the structure as shown in formula (II) is made is dilute Earth metal catalyst;
Wherein, R H, RE are selected from scandium, yttrium or lanthanide element.
4. preparation method according to claim 3, wherein the R is H, and the RE is selected from Er, Sm, Dy or Y.
5. preparation method according to claim 3, wherein relative to [(Me described in 1mmol3Si)2N]3RE(μ-Cl)Li (THF)3, the dosage of the ligand one or ligand two is 2-2.5mmol.
6. preparation method according to claim 3, wherein relative to [(Me described in 1mmol3Si)2N]3RE(μ-Cl)Li (THF)3, the dosage of the organic solvent is 15-25mL.
7. preparation method according to claim 3, wherein the complexation reaction at least meets the following conditions: reaction temperature It is 45-55 DEG C, reaction time 12-24h.
8. the preparation method according to any one of claim 3-7, wherein the organic solvent is selected from n-hexane, four Hydrogen furans and toluene it is one or more.
9. the preparation method according to any one of claim 3-7, wherein the protection gas be selected from helium, nitrogen and One of argon gas is a variety of.
10. a kind of ion pair type rare-earth metal catalyst as claimed in claim 1 or 2 is in catalysis trimethyl silicane nitrile to carbonylation Close the application in the nucleophilic addition of object.
11. application according to claim 10, wherein relative to the carbonyls of 1mmol, the ion pair type The dosage of rare-earth metal catalyst is 0.0001-0.01mmol.
12. application according to claim 11, wherein relative to the carbonyls of 1mmol, the ion pair type The dosage of rare-earth metal catalyst is 0.002-0.01mmol.
13. application according to claim 10, wherein relative to the carbonyls of 1mmol, the trimethyl silicane The dosage of nitrile is 1-1.5mmol.
14. application according to claim 10, wherein the nucleophilic addition at least meets the following conditions: reaction temperature Degree is 20-30 DEG C, reaction time 2-6h.
15. application described in any one of 0-14 according to claim 1, wherein the carbonyls is selected from ketone chemical combination Object or aldehyde compound.
16. application according to claim 14, wherein the carbonyls is selected from alkanones compound, alicyclic ketone Class compound, aromatic ketone compounds or heterocyclic ketones.
17. application according to claim 15, wherein the carbonyls is 3- methyl -2- butanone, cyclohexanone, ring Pentanone, acetophenone, melilotal, parachloroacetophenone, parabromoacetophenone, p-nitroacetophenone, o-methyl-benzene ethyl ketone, adjacent chlorine Acetophenone, ortho-nitroacetophenone, m-nitroacetophenone, meta-methoxy acetophenone, 2- acetonaphthone, 2- acetylpyridine.
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