CN106939059B - The poromeric method of homochiral molecule construction based on 1,1 '-union -2-naphthols - Google Patents

The poromeric method of homochiral molecule construction based on 1,1 '-union -2-naphthols Download PDF

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CN106939059B
CN106939059B CN201710135347.0A CN201710135347A CN106939059B CN 106939059 B CN106939059 B CN 106939059B CN 201710135347 A CN201710135347 A CN 201710135347A CN 106939059 B CN106939059 B CN 106939059B
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孟祥举
孙琦
肖丰收
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Zhejiang University ZJU
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    • C08J2343/00Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium or a metal; Derivatives of such polymers
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Abstract

The present invention relates to the technologies of preparing of polymer, it is desirable to provide one kind is based on the poromeric method of homochiral molecule construction of 1,1'- union -2-naphthol.This method comprises: polymerization initiator is added after basic framework material is dissolved in porogenic solvents;6~48h of stirring polymerization, is distilled to recover solvent, obtains by the porous polymer material of homochiral molecule construction at 60~240 DEG C;The present invention passes through the porous chiral polymer of free radical polymerization one-step synthesis method;Obtained chiral polymer is made to have better chiral induction environment that monomer is not additionally added again in the synthesis process;A series of chiral ligand can be obtained as basic framework by designing the BINOL molecule of vinyl functionalization;Between 0.5~200nm, specific surface area reaches as high as 1000m in obtained resin aperture2/g。

Description

The poromeric method of homochiral molecule construction based on 1,1 '-union -2-naphthols
Technical field
The invention belongs to organic chemistry, chemical engineering, physical chemistry, technical field of material chemistry is related to the preparation skill of polymer Art, in particular to a kind of poromeric synthesis side of the homochiral molecule construction based on 1,1'- union -2-naphthol (BINOL) Method.
Background technique
Chirality is an essential characteristic of the Nature.Set about as the demand of the chiral compound of people increasingly increases driving The development of property catalyst.[a)Peng,Y.;Gong,T.;Zhang,K.;Lin,X.;Liu,Y.;Jiang,J.;Cui, Y.Nat.Commun.2014,5,4406;b)Bradshaw,D.;Claridge,J.B.;Cussen,E.J.;Prior,T.J.; Rosseinsky,M.J.Acc.Chem.Res.2005,38,273-282;c)Collins,A.N.;Sheldrake,G.N.; Crosby,J.Chirality in Industry:Developments in the Commercial Manufacture and Applications of Optically Active Compounds.John Wiley&Sons:Chichester,1992;d) Fernández-Pérez,H.;Etayo,P.;Panossian,A.;Vidal-Ferran,A.Chem.Rev.2011,111, 2119-2176;e)Yang,H.;Zhang,L.;Zhong,L.;Yang,Q.;Li,C.Angew.Chem.Int.Ed.2007,46, 6861-6865] the homogeneous chiral catalyst of often has high activity and selectivity.But homogeneous chiral catalyst is difficult to repeat It utilizes, and low utilization efficiency due to caused by poor stability further limits their practical application.[a)Dai, L.-X.Angew.Chem.Int.Ed.2004,43,5726-5729;(b)Crabtree,R.H.Chem.Rev.2015,115, 127-150].So design and synthesis have excellent catalytic performance, efficiently, stablizes and the catalyst being easily recycled is always to grind The cost of enantiomer molecule is made to reduce by chiral catalysis for the hot spot studied carefully.
Porous polymer is because its designability is strong, big specific surface area, regulatable cellular structure, excellent chemistry and water The features such as stability and be catalyzed, adsorb, ion exchange, and separation etc. be widely used.[a)Sun,Q.;Dai,Z.; Meng,X.;Xiao,F.-S.Chem.Soc.Rev.2015,44,6018-6034;b)Sun,Q.;Dai,Z.;Meng,X.; Wang,L.;Xiao,F.-S.J.Am.Chem.Soc.ACS Catal.2015,5,4556-4567;c)Kaur,P.;Hupp, J.T.;Nguyen,S.T.ACS Catal.2011,1,819-835;d)Zhang,Y.;Riduan, S.N.Chem.Soc.Rev.2012,41,2083-2094];On the other hand, 1,1'- union -2-naphthol (present invention in BINOL is referred to) because of its outstanding stereoselectivity and modifiability, it is widely used in designing new hand as plateform molecules Property ligand [a) Teichert, J.F.;Feringa,B.L.Angew.Chem.Int.Ed.2010,49,2486-2528;b)van den Berg,M.;Minnaard,A.J.;Haak,R.M.;Leeman,M.;Schudde,E.P.;Meetsma,A.; Feringa,B.L.;de Vries,A.H.M.;Maljaars,C.E.P.;Willans,C.E.;Hyett,D.;Boogers, J.A.F.;Henderickx,H.J.W.;de Vries,J.G.Adv.Synth.Catal.2003,345,308-323;c)d' Augustin,M.;Palais,L.;Alexakis,A.Angew.Chem.Int.Ed.2005,44,1376-1378;d)Khan, A.;Yang,L.;Xu,J.;Jin,L.Y.;Zhang,Y.J.Angew.Chem.Int.Ed.2014,53,11257-11260;e) Wang,X.;Ding,K.J.Am.Chem.Soc.2004,126,10524-10525;f)Fu,W.;Tang,W.ACS Catal.2016,6,4814-4858;g)Schmitz,C.;Holthusen,K.;Leitner,W.;Franciò,G.ACS Catal.2016,6,1584-1589].It is well known that [a) by the immobilized stability for being expected to improve them of orgnometallic catalyst Totten,R.K.;Weston,M.H.;Park,J.K.;Farha,O.K.;Hupp,J.T.;Nguyen,S.T.ACS Catal.2013,3,1454-1459;b)Mo,K.;Yang,Y.;Cui,Y.J.Am.Chem.Soc.2014,136,1746- 1749;c)Yang,D.;Odoh,S.O.;Wang,T.C.;Farha,O.K.;Hupp,J.T.;Cramer,C.J.; Cagliardi,L.;Gates,B.C.J.Am.Chem.Soc.2015,137,7391-7396;d)McKittrick,M.W.; Jones,C.W.J.Am.Chem.Soc.2004,126,3052-3053;e)Li,Z.;Xiao,J.-D.;Jiang,H.-L.ACS Catal.2016,6,5359-5365.] and also it is able to achieve recycling.These all substantially increase their application prospect. But the method for preparing multi-phase chiral catalyst of existing report is generally all comparatively laborious, and various preparation methods match difference The general applicability of body is poor.
To which how synthesis multi-phase chiral catalyst that is easy and being suitable for being mass produced is still a challenge.
Summary of the invention
The technical problem to be solved by the present invention is to overcome deficiency in the prior art, provide a kind of based on 1,1'- connection -2- The poromeric method of homochiral molecule construction of naphthols.
In order to solve the technical problem, solution of the invention is:
A kind of poromeric method of homochiral molecule construction being based on 1,1'- union -2-naphthol is provided, comprising steps of
According to basic framework material: porogenic solvents: the mass ratio of polymerization initiator is 1: 2~40: 0.001~0.1, by base This framework material is dissolved in porogenic solvents, and polymerization initiator is then added;6~48h of stirring polymerization, distills back at 60~240 DEG C Solvent is received, is obtained by the porous polymer material of homochiral molecule construction;
The basic framework material is the chiral ligand of the BINOL base of vinyl functionalization, is by vinyl functionalization The chiral phosphoramidite ligand that is reacted with amine, alcohol or phenolic compound of BINOL or chiral phosphite ester ligand.
In the present invention, the porogenic solvents are tetrahydrofuran, ethyl acetate, ethyl alcohol, n,N-Dimethylformamide, N- methyl Any one in pyrrolidones or 1,2- dichloroethanes.
In the present invention, the polymerization initiator is azodiisobutyronitrile.
In the present invention, the basic framework material the preparation method comprises the following steps:
(1) 1, the 1'- union -2-naphthol containing 2mmol vinyl functionalization is dissolved in 20mL toluene, is then added 3mmol tri- (dimethylamino) phosphine, flow back 12h under the atmosphere of 80 DEG C and nitrogen;After reaction by toluene Rotary Evaporators It is spin-dried for, then is recrystallized with petroleum ether, obtain methyl substituted chiral phosphoramidite ligand;Alternatively,
(2) the 1,1'- union -2-naphthol of 2mmol vinyl functionalization is dissolved in 10mL PCl3, two drop N- methyl pyrroles are added After pyrrolidone, 1h is reacted under the atmosphere of 60 DEG C and nitrogen;PCl is removed under reduced pressure3Afterwards, the anhydrous of 50mL is added into reaction system Then tetrahydrofuran is added excessive secondary amine and continues to react, obtain the chiral phosphoramidite ligand of substituent group substitution;Or Person,
(3) the 1,1'- union -2-naphthol of 2mmol vinyl functionalization is dissolved in 10mL PCl3, two drop N- methyl pyrroles are added After pyrrolidone, 1h is reacted under the atmosphere of 60 DEG C and nitrogen;PCl is removed under reduced pressure3Afterwards, 50mL anhydrous four is added into reaction system Hydrogen furans, 3mmol triethylamine and 2.4mmol alcohol compound or phenolic compound are reacted, and chiral phosphite ester is obtained Ligand.
In the present invention, the secondary amine is diethylamine, diisopropylamine, N- methyl tertbutyl amine, double-(1- phenylethyl) Any one in amine, cyclohexylamine or morpholine;The alcohols or phenolic compound is methanol, isopropanol, phenol, 1- phenyl second Alcohol, 2-TBP or 2, any one in 6- DI-tert-butylphenol compounds.
In the present invention, the poromeric aperture prepared between 0.5~200nm, specific surface area 400~ 1000m2Between/g.
Compared with prior art, the beneficial effects of the present invention are:
(1) pass through the porous chiral polymer of free radical polymerization one-step synthesis method;
(2) obtained chiral polymer is made to have better chirality to lure that monomer is not additionally added again in the synthesis process Lead ring border;
(3) a series of chirality can be obtained as basic framework by the BINOL molecule of design vinyl functionalization to match Body;
(4) between 0.5~200nm, specific surface area reaches as high as 1000m in obtained resin aperture2/g。
Detailed description of the invention
Fig. 1 is the synthetic route chart of the BINOL ligand of styryl functionalization.
In figure, (i) Br2, CH2Cl2;(ii) tri isopropyl chlorosilane, imidazoles, 4-dimethylaminopyridine, N, N- dimethyl methyl Amide;(iii) 4- vinylphenylboronic acid, Pd (PPh3)4, K2CO3, tetrahydrofuran, H2O;(iv) tetrabutyl ammonium fluoride, tetrahydro furan It mutters.
Fig. 2 is the synthetic route chart of the BINOL ligand of vinyl functionalization.
In figure, (v) tetrafluoroethene ylboronic acid potassium, Pd (PPh3)4, K2CO3, tetrahydrofuran, H2O;(vi) tetrabutyl ammonium fluoride, Tetrahydrofuran.
Fig. 3 is methyl substituted phosphoramidite ligand.
Fig. 4 is the phosphoramidite ligand structural formula of typical vinyl functionalization.
Fig. 5 is the phosphite ester ligand of typical vinyl functionalization.
Fig. 6 is polymer samples in embodiment 113C MAS NMR figure.
Fig. 7 is polymer samples in embodiment 131P MAS NMR figure.
Fig. 8 is the N of polymer samples in embodiment 12Adsorption isotherm.
Fig. 9 is the graph of pore diameter distribution of polymer samples in embodiment 1.
Figure 10 is the N of polymer samples in embodiment 62Adsorption isotherm.
Figure 11 is the graph of pore diameter distribution of polymer samples in embodiment 6.
Specific embodiment
The present invention obtains porous chiral polymer by the one step solvent thermal polymerization of chiral molecules of vinyl functionalization.
Related content is stated in detail below by way of specific embodiment.
The preparation of basic framework material
Basic framework material is the chiral ligand of the BINOL base of vinyl functionalization, is by vinyl functionalization The chiral phosphoramidite ligand or chiral phosphite ester ligand that BINOL is reacted with amine, alcohol or phenolic compound.Preparation route As depicted in figs. 1 and 2.
The synthesis step of 6,6'- bis- bromo- [1,1'- dinaphthalene] -2,2'- glycol (compound 1) is as follows, and the BINOL of 5.0g is molten In the CH of 100mL2Cl2, after waiting system temperatures to drop to -10 DEG C, 2.4mL Br2With 20mL CH2Cl2It is slowly dropped to after dilution State solution.It is added dropwise after being further continued for reaction 3h and uses NaHSO3Aqueous solution quenching.Water phase CH2Cl2It extracts and uses MgSO4It is dry It is dry, rotary evaporation CH2Cl2Obtained white solid had both been compound 1.
The synthesis of bromo- [1,1'- the dinaphthyl] -2,2'- diyl dioxygen two (tri isopropyl silane) (compound 2) of 6,6'- bis- walks Rapid as follows, the tri isopropyl chlorosilane (TIPSCl) of 17.4mL is added drop-wise to containing 15.8g compound 1,5.33g imidazoles, 9.56g The DMF solution (150mL) of 4- lutidines.After being stirred at room temperature for 24 hours, 200mL NaCl solution is added to reaction above System.Obtained reaction solution CH2Cl2It extracts and uses MgSO4It is dry, rotary evaporation CH2Cl2Obtained solid is mentioned with chromatographic column Compound 2 is obtained after pure.
Bis- 4- ethenylphenyl of 6,6'--two (tri isopropyl silane) (compound of [1,1'- dinaphthyl] -2,2'- diyl dioxygen 3) synthesis step is as follows, 2g compound 2,0.98g 4- vinylphenylboronic acid, 0.18g Pd (PPh3)4, the K of 1M2CO3Solution The tetrahydrofuran of 15mL and 80mL is in N2Lower reflux 12h.Equal reaction solutions drop to room temperature, are extracted with ether and use MgSO4It is dry, rotation Turn to obtain compound 3 after the solid that evaporation solvent obtains is purified with chromatographic column.
6,6'- bis- 4- ethenylphenyls-[1,1'- dinaphthalene] -2,2'- glycol (compound 4) synthesis step is as follows, 4.6g Three water tetrabutyl ammonium fluorides be added drop-wise to 5.0g 3 100mL tetrahydrofuran.Etc. continuing to be stirred at room temperature after being added dropwise After 4h, excessive water quenching is added, is extracted with ether and uses MgSO4It is dry, the solid chromatographic column that rotary evaporation of solvent obtains Compound 4 is obtained after purification.
The conjunction of 6,6'- divinyl-[1,1'- dinaphthyl] -2,2'- diyl dioxygen two (tri isopropyl silane) (compound 5) At steps are as follows, 2g compound 2,0.90g vinyl fluoride potassium borate, 0.18g Pd (PPh3)4, the K of 1M2CO3Solution 15mL and The tetrahydrofuran of 80mL is in N2Lower reflux 12h.Equal reaction solutions drop to room temperature, are extracted with ether and use MgSO4It is dry, rotary evaporation The solid that solvent obtains obtains compound 5 after being purified with chromatographic column.
6,6'- divinyl-[1,1'- dinaphthalene] -2,2'- glycol (compound 6) synthesis step is as follows, three water of 4.6g Tetrabutyl ammonium fluoride is added drop-wise to the tetrahydrofuran of the 100mL of 4.0g compound 5.Etc. after being added dropwise continuing that 4h is stirred at room temperature Afterwards, excessive water quenching is added, is extracted with ether and uses MgSO4Dry, the solid that rotary evaporation of solvent obtains is mentioned with chromatographic column Compound 4 is obtained after pure.
The chiral phosphoramidite ligand of the BINOL base of heretofore described vinyl functionalization is obtained by following methods preparation : chemical structural formula (7) and (8) corresponding methyl substituted phosphoramidite ligand are by compound 4 (2mmol) or chemical combination in Fig. 3 Object 6 (2mmol) is dissolved in toluene (20mL) and flows back under the atmosphere of 80 DEG C and nitrogen after three (dimethylamino) phosphines (3mmol) are added 12h.Rotary evaporation toluene, obtained solid are recrystallized to give product (Fig. 3) with petroleum ether.
The phosphoramidite ligand synthesis that other groups replace is as follows: compound 4 (2mmol) or compound 6 (2mmol) are dissolved in PCl3(10mL) and 1h is reacted under the atmosphere of 60 DEG C and nitrogen after two drop N-Methyl pyrrolidones are added.PCl is removed under reduced pressure3Afterwards, The anhydrous tetrahydro furan of 50mL is added toward reaction system, excessive secondary amine is then added.Chemical structural formula (9)-(20) are right in Fig. 4 Several representative phosphoramidite ligands for being answered, this method can be adapted for any secondary amine in principle.
The chiral phosphite ester ligand of the BINOL base of heretofore described vinyl functionalization is obtained by following methods preparation : compound 4 (2mmol) or compound 6 (2mmol) are dissolved in PCl3It (10mL) and is added after two drop N-Methyl pyrrolidones 60 DEG C and the atmosphere of nitrogen under react 1h.PCl is removed under reduced pressure3Afterwards, then toward reaction system anhydrous tetrahydro furan, three second of 50mL are added Amine (3mmol) and alcohol compound or phenolic compound (2.4mmol) are reacted, and chiral phosphite ester ligand is obtained.Figure It is several representative chiral phosphite ester ligands that chemical structural formula (21)-(32) are corresponding in 5, and this method can fit in principle Different phosphite ester ligands is obtained for any alcohols (or phenols) compound.
Embodiment 1
1g compound 7,20g ethyl acetate, 0.001g azodiisobutyronitrile are mixed, are heating under stirring conditions To 120 DEG C, 6h is reacted, solvent distillation obtains the polymer of white.The sample13C MAS NMR and31P MAS NMR schemes such as Shown in Fig. 6 and Fig. 7, it can be seen that also occur a strong peak on the solid carbon nuclear-magnetism of polymer at 41.2ppm, this illustrates second Alkenyl polymerization successfully has occurred.31P MAS NMR figure shows the chemical shift of the P nuclear-magnetism of polymer and the chemical shift of monomer It is almost the same, illustrate that the valence state of P in the course of the polymerization process does not change.N2Absorption result shows, obtained polymer Specific surface area is in 490m2/ g or so (Fig. 8), pore-size distribution is at 0.5-150nm (Fig. 9).
Embodiment 2
By 1g compound (8-20), 2g tetrahydrofuran, 0.01g azodiisobutyronitrile is mixed, under stirring conditions 60 DEG C are being heated to, is being reacted 24 hours, solvent distillation, the polymer of white is obtained.N2Absorption result shows, obtained polymerization The specific surface area of object is 400-780g/m2Or so, between 1~100nm.
Embodiment 3
By 1g compound (8-20), 40g n,N-Dimethylformamide, 0.005g azodiisobutyronitrile is mixed, and is being stirred 240 DEG C are being heated under conditions of mixing, is reacting 48h, solvent distillation obtains the polymer of white.N2Absorption result shows, gained The specific surface area of the polymer arrived is 500~1000g/m2Or so, between 0.5~80nm.
Embodiment 4
By 1g compound (21-32), 20g ethyl alcohol, 0.1g azodiisobutyronitrile is mixed, and is being added under stirring conditions Heat reacts 12h to 100 DEG C, and solvent distillation obtains the polymer of white.N2Absorption result shows, the ratio of obtained polymer Surface area is in 400-600m2/ g or so, between 1~200nm.
Embodiment 5
By 1g compound (21-32), 10g N-Methyl pyrrolidone, 0.01g azodiisobutyronitrile is mixed, and is being stirred Under conditions of be heated to 150 DEG C, for 24 hours, solvent distillation obtains the polymer of white for reaction.N2Absorption result is shown, acquired Polymer specific surface area be 460~780g/m2Left and right, aperture is between 0.3~100nm.
Embodiment 6
By 1g compound 26,20g 1,2- dichloroethanes, 0.008g azodiisobutyronitrile is mixed, in the condition of stirring Under be heated to 100 DEG C, for 24 hours, solvent distillation obtains the polymer of white for reaction.N2Absorption result shows, obtained polymerization The specific surface area of object is 523g/m2(Figure 10), between 1.5~100nm (Figure 11).

Claims (5)

1. the poromeric method of homochiral molecule construction that one kind is based on 1,1'- union -2-naphthol, which is characterized in that including Step:
According to basic framework material: porogenic solvents: the mass ratio of polymerization initiator is 1: 2~40: 0.001~0.1, by basic bone Frame material is dissolved in porogenic solvents, and polymerization initiator is then added;6~48h of stirring polymerization, is distilled to recover molten at 60~240 DEG C Agent is obtained by the porous polymer material of homochiral molecule construction;
The basic framework material is the chiral ligand of 1, the 1'- union -2-naphthol base of vinyl functionalization, is by vinyl function The chiral phosphoramidite ligand or chiral phosphorous acid that the 1,1'- union -2-naphthol of energyization is reacted with amine, alcohol or phenolic compound Ester ligand;
The basic framework material the preparation method comprises the following steps:
(1) 1, the 1'- union -2-naphthol containing 2mmol vinyl functionalization is dissolved in 20mL toluene, 3mmol tri- is then added (dimethylamino) phosphine, flow back 12h under the atmosphere of 80 DEG C and nitrogen;Toluene is spin-dried for Rotary Evaporators after reaction, then It is recrystallized with petroleum ether, obtains methyl substituted chiral phosphoramidite ligand;Alternatively,
(2) the 1,1'- union -2-naphthol of 2mmol vinyl functionalization is dissolved in 10mL PCl3, two drop N-Methyl pyrrolidones are added Afterwards, 1h is reacted under the atmosphere of 60 DEG C and nitrogen;PCl is removed under reduced pressure3Afterwards, the anhydrous tetrahydro furan of 50mL is added into reaction system It mutters, excessive secondary amine is then added and continues to react, obtain the chiral phosphoramidite ligand of substituent group substitution;Alternatively,
(3) the 1,1'- union -2-naphthol of 2mmol vinyl functionalization is dissolved in 10mL PCl3, two drop N-Methyl pyrrolidones are added Afterwards, 1h is reacted under the atmosphere of 60 DEG C and nitrogen;PCl is removed under reduced pressure3Afterwards, the anhydrous tetrahydro furan of 50mL is added into reaction system Mutter, 3mmol triethylamine and 2.4mmol alcohol compound or phenolic compound are reacted, obtain chiral phosphite ester and match Body.
2. the method according to claim 1, wherein the porogenic solvents are tetrahydrofuran, ethyl acetate, second Any one in alcohol, N,N-dimethylformamide, N-Methyl pyrrolidone or 1,2- dichloroethanes.
3. the method according to claim 1, wherein the polymerization initiator is azodiisobutyronitrile.
4. the method according to claim 1, wherein the secondary amine is diethylamine, diisopropylamine, N- methyl Tert-butylamine, double-(1- phenylethyl) amine, any one in cyclohexylamine or morpholine;The alcohols or phenolic compound be Methanol, isopropanol, phenol, 1- phenylethanol, 2-TBP or 2, any one in 6- DI-tert-butylphenol compounds.
5. the method according to claim 1, which is characterized in that the poromeric aperture prepared 0.5~200nm it Between, specific surface area is in 400~1000m2Between/g.
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