CN105541925B - Ferrocene frame having ferrocene frame N, N ligand and its preparation method and application - Google Patents

Ferrocene frame having ferrocene frame N, N ligand and its preparation method and application Download PDF

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CN105541925B
CN105541925B CN201610040998.7A CN201610040998A CN105541925B CN 105541925 B CN105541925 B CN 105541925B CN 201610040998 A CN201610040998 A CN 201610040998A CN 105541925 B CN105541925 B CN 105541925B
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ferrocene
ligand
frame
ferrocene frame
chirality
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CN105541925A (en
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张生勇
姚琳
聂慧芳
陈卫平
刘雪英
李晓晔
张东旭
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Fourth Military Medical University FMMU
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    • C07F17/00Metallocenes
    • C07F17/02Metallocenes of metals of Groups 8, 9 or 10 of the Periodic Table
    • 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
    • B01J31/2282Unsaturated compounds used as ligands
    • B01J31/2295Cyclic compounds, e.g. cyclopentadienyls
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    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C67/00Preparation of carboxylic acid esters
    • C07C67/30Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group
    • C07C67/333Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisation; by change of size of the carbon skeleton
    • C07C67/343Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon 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
    • B01J2531/00Additional information regarding catalytic systems classified in B01J31/00
    • B01J2531/02Compositional aspects of complexes used, e.g. polynuclearity
    • B01J2531/0261Complexes comprising ligands with non-tetrahedral chirality
    • B01J2531/0263Planar chiral ligands, e.g. derived from donor-substituted paracyclophanes and metallocenes or from substituted arenes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2531/00Additional information regarding catalytic systems classified in B01J31/00
    • B01J2531/80Complexes comprising metals of Group VIII as the central metal
    • B01J2531/84Metals of the iron group
    • B01J2531/842Iron

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Abstract

General structure (1) show novel chiral N, the N ligand based on ferrocene frame having ferrocene frame, wherein R1For the alkyl of C1-C7, aryl or substituted aryl, R2For hydrogen or the alkyl-substituted silylation of C1-C7, R3For hydroxyl or the alkoxy of C1-C7, R4For hydrogen, the alkyl of C1-C7, aryl or substituted aryl, the substituted group is selected from phenyl, benzyl, naphthalene, the alkyl of C1-C7, the alkoxy of C1-C7, halogen, nitro, hydroxyl.The present invention is raw material using ferrocene cheap and easy to get, prepare novel N by easy synthetic route, N ligand, introduces multiple chiral factors in this ligand, and introduce hydrogen-bond donor, the fine structures such as steric hindrance and electronic effect are with good adjustability.

Description

Ferrocene frame having ferrocene frame N, N ligand and its preparation method and application
Technical field
Novel chiral N, N ligand the present invention relates to one kind based on ferrocene frame having ferrocene frame belongs to asymmetry catalysis synthesis field.
Background technique
In numerous chiral skeletons for constructing ligand, ferrocene because its high heat stability, chemical stability and easily It the features such as modification and special electronic effect, spatial chemistry, is widely used in asymmetric catalysis.Two The type of luxuriant iron ligand is varied, can be subdivided by different the position of substitution, the number of substituent group and coordination atom difference Different types of ligand.
In developed ferrocene chiral ligand, the overwhelming majority be biphosphine ligand and phosphine-hetero atom bidentate ligand, typically Example such as Walphos, Chenphos and TriPhos etc..Related ferrocene is the chiral N of skeleton, and the report of N- ligand is but extremely It is rare.It is well known that N, N- ligand because its stability, it is convieniently synthesized, be widely used the features such as one in asymmetric catalysis field Directly it is concerned.
Summary of the invention
The purpose of the present invention is to provide a kind of raw materials to be easy to get, convieniently synthesized, catalytic activity is high, chiral induction acts on strong Ferrocene N, N- ligand, such ligand include multiple chiral factors, and there is also potential hydrogen-bond donors, in the reaction can be the bottom of with Object forms secondary interaction and further stablizes reaction transition state, is a kind of efficient novel chiral N, N- ligand.
It is a further object of the present invention to provide the preparation methods of above-mentioned ligand.
It is a still further object of the present invention to provide above-mentioned ligands and palladium original position composition catalyst in asymmetry catalysis allyl Application in base substitution reaction.
Realization process of the invention is as follows:
Ferrocene frame having ferrocene frame chirality N, N ligand shown in general structure (1),
(I)
R1For the alkyl of C1-C7, aryl or substituted aryl;
R2For hydrogen or the alkyl-substituted silylation of C1-C7;
R3For hydroxyl or the alkoxy of C1-C7;
R4 For hydrogen, the alkyl of C1-C7, aryl or substituted aryl;
The substituted group be selected from phenyl, benzyl, naphthalene, the alkyl of C1-C7, the alkoxy of C1-C7, halogen, nitro, Hydroxyl.
Specifically, R1For methyl, isopropyl, tert-butyl, cyclohexyl, phenyl, 2,4 dichloro benzene base, benzyl, adamantane Base;R2For trimethylsilyl or hydrogen;R3For methoxyl group or hydroxyl;R4 Middle aryl is selected from phenyl, benzyl, naphthalene, the alkane of C1-C7 The aryl that base, the alkoxy of C1-C7, halogen, nitro, hydroxyl replace.
The inductive structure of typical ferrocene N, the N- ligand in part is as follows:
The preparation method of above-mentioned ferrocene frame having ferrocene frame chirality N, N ligand, comprising the following steps:
(1) using ferrocenecarboxylic acid as raw material, with chiral amino alcohol in the presence of triphenylphosphine, carbon tetrachloride, triethylamine, Generate ferrocene-oxazoline class compound;
(2) ortho lithiation occurs under that action of n-butyl lithium for above-mentioned ferrocene-oxazoline compound, with trimethylchloro-silicane Alkane effect generates key intermediate;
(3) pyridine carboxaldehyde or substituted pyridines formaldehydes are added under that action of n-butyl lithium again after lithiumation in above-mentioned intermediate Compound generates ferrocene class N, N- ligand through column chromatography for separation.
Synthetic route is as follows:
Ferrocene frame having ferrocene frame chirality N, N ligand of the present invention can be applicable in the allyl group alkylated reaction of palladium chtalyst.
Two building blocks of oxazoline and pyridine are dexterously assembled in ferrocene in Catalyst Design of the invention by inventor On skeleton, a kind of novel ferrocene N, N- ligand is formed, while introducing a potential hydrogen-bond donor, the latter is as Louis This acid, the hydrogen bond that can be formed between the hydrogen bond receptor in related substrates, this secondary interaction force are living to the catalysis of reaction Property and stereoselectivity play a crucial role.In addition, by the unique stereoeffect of ferrocene frame having ferrocene frame, in such ligand In introduce the factor of face chirality, so that such ligand is become structure height adjustable, expand its potential application value.The present invention Involved in application of ferrocene N, the N- ligand in the allyl substitution reaction of palladium chtalyst, it is high, vertical to show reactivity The advantages such as body is selectively good, substrate spectrum is extensive, it is shown that its application prospect in asymmetric catalysis field.
Specific embodiment
Embodiment 1: preparation (R)-{2-[(S) -4- isopropyl -4,5- dihydro-oxazole base] -3- (trimethylsilyl) benzene Base }-(2- pyridyl group)-methanol 1 and (S)-{2-[(S) -4- isopropyl -4,5- dihydro-oxazole base] -3- (trimethylsilyl) benzene Base }-(2- pyridyl group)-methanol 1 '
Step 1:
Ferrocenecarboxylic acid (3.10g, 13.5 mmol) are added in 250mL single port bottle, after evacuated/inflated with nitrogen circulation, Dry methylene chloride 25mL is added, draws oxalyl chloride (2.40mL, 27.0 mmol) with syringe and stirs at room temperature, reaction has Gas is released, and reaction solution becomes peony after 20 m, is continued after stirring 10 m, revolving removes solvent, obtained brown-red solid Be directly dissolved in 15mL methylene chloride, be added to after long needle aspirate (S)-valerian ammonia alcohol (1.65g, 16.11 mmol) and three In the dichloromethane solution of ethamine (3.75 mL, 27.0 mmol), under nitrogen protection, it is stirred overnight at room temperature, gained dark-brown Mixture washes (2 x, 30 mL), anhydrous Na2SO4Dry, gained crude product column chromatographic purifying obtains yellow solid 3.6g, produces Rate 84%.
In the acetonitrile solution of yellow solid obtained above (2.45 g) and triphenylphosphine (7.47 g) (60 mL), add Enter triethylamine (4.8 ml) and carbon tetrachloride (6.6mL), gained mixture are stirred overnight at room temperature under nitrogen protection, adds 80mL water It is quenched, petroleum ether extraction (5 x, 50 mL), merges organic phase, anhydrous MgSO4Dry, crude by column chromatography purifies to obtain phase Ferrocene-the oxazoline answered is light yellow solid, total 2.04g, yield 89%.
Step 2:
Take the history Nike pipe that ferrocene-oxazoline obtained in step 1 (2.04g, 6.86 mmol) is dry in a 100mL In, it vacuumizes, inflated with nitrogen, is added dry ether (20mL), is cooled to 0 DEG C, carefully draws n-BuLi (1.6M with long syringe needle Hexane solution, 4.72 mL, 7.55 mmol) it is slowly added to above-mentioned reaction tube, after stirring 1h at 0 DEG C, drawn with syringe Trimethylsilyl chloride (0.96mL, 7.55 mmol) is warmed to room temperature naturally after stirring 1h at 0 DEG C, and anhydrous ether dilution is added Reaction solution, a small amount of water quenching reaction separate organic layer, anhydrous Na2SO4Dry, revolving removes solvent, and column chromatographic purifying there are tangerine Red solid 2.2g, yield 87%.
Step 3:
It takes the above Chinese red solid powder (2.0g, 5.41 mmol) in one 100 mL dry history Nike pipe, takes out true Anhydrous THF (15 mL) is added in sky, inflated with nitrogen, be slowly added under -78 °C n-BuLi (1.6M hexane solution, 3.72 ML, 5.95 mmol), at this temperature stir 1h after, in this reaction tube be added 2- pyridine carboxaldehyde (0.57 mL, 5.95 Mmol), after reacting 2h at the same temperature, reaction solution is slowly increased to room temperature and is stirred overnight, and is quenched with 2mL methanol, revolving is removed Solvent is removed, column chromatographic purifying respectively obtains target product 1, is crocus solid, total 976mg, yield 38%;Obtain target production Object 1 ' is Chinese red solid, total 1.03g, yield 40%.
Compound 1:[α] D 25 =+367.5° (c=0.5, CH2Cl2); m.p. 114.4-116 ºC; 1H NMR (400 MHz, CDCl3) δ 8.56 (d, J = 4.5 Hz, 1H), 8.23 (bs, 1H), 7.72-7.67 (m, 1H), 7.19-7.17 (m, 1H), 5.95 (s, 1H), 4.54-4.41 (m, 1H), 4.29 (s, 5H), 4.19 (d, J = 2.2 Hz, 1H), 4.11 (s, 1H), 4.04-3.99 (m, 2H), 1.73 (dq, J = 13.0, 6.5 Hz, 1H), 0.97 (d, J = 6.7 Hz, 3H), 0.88 (d, J = 6.7 Hz, 3H), 0.24 (s, 9H). 13C NMR (100 MHz, CDCl3) δ 168.99, 162.57, 148.28, 136.29, 122.09, 121.36, 95.28, 77.34, 77.23, 77.03, 76.71, 75.83, 75.42, 73.82, 73.40, 71.75, 70.70, 70.49, 32.86, 18.82, 18.56, 0.76; HRMS m/z calcd for C25H32FeN2O2Si [M+H]+ 477.1582, found 477.1664.
Compound 1 ': [α] D 25 =+216.7° (c=0.5, CH2Cl2); m.p. 97.6-98.8 ºC; 1H NMR (400 MHz, CDCl3) δ 8.56 (d, J = 4.4 Hz, 1H), 8.32 (bs, 1H), 7.91 (d, J = 7.8 Hz, 1H), 7.83 (t, J = 7.5 Hz, 1H), 7.23 (d, J = 6.1 Hz, 1H), 5.70 (s, 1H), 4.36 (t, J = 7.5 Hz, 1H), 4.28 (s, 5H), 4.14-4.03 (m, 3H), 3.63 (s, 1H), 1.81-1.68 (m, 1H), 0.99 (d, J = 6.6 Hz, 3H), 0.94 (d, J = 6.7 Hz, 3H), 0.27 (s, 9H). 13C NMR (100 MHz, CDCl3) δ 168.99, 162.37, 148.19, 136.59, 122.16, 121.32, 100.65, 77.25, 74.73, 74.50, 73.76, 71.72, 71.67, 70.50, 70.33, 70.24, 32.99, 18.71, 18.35, 0.57; HRMS m/z calcd for C25H32FeN2O2Si [M+H]+ 477.1582, found 477.1664。
Embodiment 2: preparation (R)-{2-[(S) -4- tert-butyl -4,5- dihydro-oxazole base] -3- (trimethylsilyl) benzene Base }-(2- pyridyl group)-methanol 2 and (S)-{2-[(S) -4- tert-butyl -4,5- dihydro-oxazole base] -3- (trimethylsilyl) benzene Base }-(2- pyridyl group)-methanol 2 '
For preparation method with embodiment 1, respectively obtaining target product 2 is rufous foaming shape solid, total 1.12g, yield 41%;Obtaining target product 2 ' is crocus solid, total 945mg, yield 37%.
Compound 2:[α] D 25 =+396.3º (c=0.26, CH2Cl2); 1H NMR (400 MHz, CDCl3) δ 8.59 (d, J = 4.7 Hz, 1H), 8.14 (bs, 1H), 7.75-7.69 (m, 2H), 7.21 (td, J = 6.6, 5.8, 2.2 Hz, 1H), 5.98 (s, 1H), 4.46-4.41 (m, 2H), 4.30 (s, 5H), 4.21 (d, J = 2.5 Hz, 1H), 4.15 (t, J = 8.5 Hz, 1H), 4.07-3.99 (m, 2H), 0.9 (s, 9H), 0.27 (s, 9H). 13C NMR (100 MHz, CDCl3) δ 168.88, 162.37, 148.38, 136.20, 122.14, 121.53, 95.00, 75.77, 75.55, 75.31, 73.65, 73.38, 72.49, 70.67, 68.66, 33.67, 25.89, 0.79; HRMS m/z calcd for C26H34FeN2O2Si [M+H]+ 491.1739, found 491.1816.
Compound 2 ': [α] D 25 =+184.5° (c=0.2, CH2Cl2), m.p. 133.2-134.4ºC; 1H NMR (400 MHz, CDCl3) δ 8.59 (d, J = 4.1 Hz, 1H), 8.46 (bs, 1H), 7.97-7.95 (m, 1H), 7.86 (td, J = 7.7, 1.7 Hz, 1H), 7.27-7.25 (m, 1H), 5.71 (s, 1H), 4.31 (s, 5H), 4.27-4.16 (m, 2H), 4.11-4.02 (m, 2H), 3.61 (d, J = 2.5 Hz, 1H), 0.95 (s, 9H), 0.29 (s, 9H). 13C NMR (100 MHz, CDCl3) δ 169.05, 162.39, 148.21, 136.56, 122.17, 121.36, 100.80, 75.31, 74.71, 74.64, 73.83, 71.88, 71.60, 70.62, 70.24, 68.53, 33.76, 29.71, 26.37, 25.71, 0.6; HRMS m/z calcd for C26H34FeN2O2Si [M+H]+ 491.1739, found 491.1816。
Embodiment 3: preparation (R)-{2-[(S) -4- phenyl -4,5- dihydro-oxazole base] -3- (trimethylsilyl) benzene Base }-(2- pyridyl group)-methanol 3 and (S)-{2-[(S) -4- phenyl -4,5- dihydro-oxazole base] -3- (trimethylsilyl) benzene Base }-(2- pyridyl group)-methanol 3 '
For preparation method with embodiment 1, respectively obtaining target product 3 is rufous foaming shape solid, total 1.33g, yield 51%;Obtaining target product 3 ' is crocus solid, total 873mg, yield 32%.
Compound 3:[α] D 25 = +336.2° (c=0.21, CH2Cl2); 1H NMR (400 MHz, CDCl3) δ 8.55 (d, J = 4.6 Hz, 1H), 8.04 (d, J = 7.1 Hz, 1H), 7.61-7.48 (m, 2H), 7.35- 7.28 (m, 3H), 7.19-7.14 (m, 2H), 5.91 (d, J = 6.5 Hz, 1H), 5.36 (t, J = 9.0 Hz, 1H), 4.81 (t, J = 9.2 Hz, 1H), 4.36 (s, 5H), 4.34-4.29 (m, 2H), 4.19 (t,J = 8.3 Hz, 1H), 0.30 (s, 9H). 13C NMR (100 MHz, CDCl3) δ 170.51, 162.83, 148.08, 141.64, 136.45, 130.93, 128.72, 127.69, 126.68, 121.97, 121.30, 96.08, 76.27, 75.56, 74.61, 74.54, 73.41, 70.86, 69.18, 65.58, 30.59, 29.72, 13.76, 0.87; HRMS m/z calcd for C28H30FeN2O2Si [M+H]+ 511.1460, found 511.1500.
Compound 3 ': [α] D 25= +289.7º (c=0.5, CH2Cl2); m.p. 168.2-169.8 ºC; 1H NMR (400 MHz, CDCl3) δ 8.59 (d, J = 4.6 Hz, 1H), 7.93-7.74 (m, 3H), 7.37-7.24 (m, 5H), 5.84 (s, 1H), 5.47-5.38 (m, 1H), 4.75 (t, J = 9.1 Hz, 1H), 4.34 (s, 5H), 4.26 (t, J = 7.8 Hz, 1H), 4.17-4.12 (m, 2H), 3.77 (d, J=1.8 Hz, 1H), 0.31 (s, 9H). 13C NMR (100 MHz, CDCl3) δ 170.43, 162.26, 148.13, 142.12, 136.65, 128.80, 127.62, 126.28, 122.20, 121.37, 100.62, 75.16, 74.62, 74.42, 74.14, 72.05, 71.17, 70.40, 69.13, 29.72, 21.09, 14.23, 0.69; HRMS m/z calcd for C28H30FeN2O2Si [M+H]+ 511.1460, found 511.1499。
Embodiment 4: preparation (R)-{2-[(S) -4- benzyl -4,5- dihydro-oxazole base] -3- (trimethylsilyl) benzene Base }-(2- pyridyl group)-methanol 4 and (S)-{2-[(S) -4- benzyl -4,5- dihydro-oxazole base] -3- (trimethylsilyl) benzene Base }-(2- pyridyl group)-methanol 4 '
For preparation method with embodiment 1, respectively obtaining target product 4 is rufous foaming shape solid, total 1.27g, yield 53%;Obtaining target product 4 ' is crocus solid, total 901mg, yield 33%.
Compound 4:[α] D 25 = +230.5° (c=0.36, CH2Cl2); 1H NMR (400 MHz, CDCl3) δ 8.57 (d, J=4 Hz, 1H), 7.99 (d, J = 5.8 Hz, 1H), 7.78-7.57 (m, 2H), 7.34-7.13 (m, 5H), 5.91 (d, J = 5.6 Hz, 1H), 4.56 (dt, J = 14.9, 8.0 Hz, 1H), 4.40 (t,J = 8.8 Hz, 1H), 4.30 (s, 5H), 4.23 (d, J = 2.1 Hz, 2H), 4.05 (t, J = 8.0 Hz, 1H), 3.12 (dd, J = 13.8, 5.7 Hz, 1H), 2.66 (dd, J = 13.8, 8.1 Hz, 1H), 0.23 (s, 8H). 13C NMR (100 MHz, CDCl3) δ 169.54, 162.83, 148.40, 137.63, 136.18, 129.13, 128.63, 126.61, 122.00, 121.21, 95.69, 75.92, 75.38, 74.14, 74.10, 73.43, 71.85, 71.71, 70.75, 66.91, 41.52, 0.74; HRMS m/z calcd for C29H32FeN2O2Si [M+H]+ 525.1616, found 525.1653.
Compound 4 ': [α] D 25 = +207.4º (c=0.5, CH2Cl2); m.p. 105.6~106.9 ºC; 1H NMR (400 MHz, CDCl3) δ 8.60 (d, J = 4.6 Hz, 1H), 7.92-7.80 (m, 3H), 7.34-7.22 (m, 5H), 5.79 (s, 1H), 4.61-4.54 (m, 1H), 4.33-4.31 (m, 1H), 4.29 (s, 5H), 4.17- 4.11 (m, 2H), 4.09 (d, J = 2.0 Hz, 1H), 3.73 (d, J = 2.3 Hz, 1H), 3.13 (dd, J = 13.7, 5.4 Hz, 1H), 2.72 (dd, J = 13.7, 8.3 Hz, 1H), 0.26 (s, 9H). 13C NMR (100 MHz, CDCl3) δ 169.47, 162.35, 148.20, 137.69, 136.54, 129.24, 128.57, 126.58, 122.16, 121.34, 100.36, 74.96, 74.41, 73.93, 71.96, 71.37, 70.30, 67.13, 41.84, 0.61; HRMS m/z calcd for C29H32FeN2O2Si [M+H]+ 525.1616, found 525.1660。
Embodiment 5: preparation (R)-{2-[(S) -4- isopropyl -4,5- dihydro-oxazole base] phenyl-(2- pyridyl group)-first Alcohol 5 and (S)-{2-[(S) -4- isopropyl -4,5- dihydro-oxazole base] phenyl-(2- pyridyl group)-methanol 5 '
It takes above compound 1 (953mg, 2.0 mmol) in the dry history Nike pipe of a 50mL, vacuumizes, inflated with nitrogen, Anhydrous DMSO (5mL) is added, under nitrogen atmosphere, is added potassium tert-butoxide (538.6mg, 4.8 mmol), stirs at room temperature Overnight, reaction solution is concentrated under reduced pressure, it is crocus solid, total 663mg, yield 82% that column chromatographic purifying, which obtains target product 5,.
[α] D 25 = +342.1° (c=0.22, CH2Cl2); m.p. 80.1-81.2 ºC; 1H NMR (400 MHz, CDCl3) δ 8.53 (d, J = 4.7 Hz, 1H), 8.23 (d, J = 6.6 Hz, 1H), 7.70-7.63(m, 2H), 7.14 (ddd, J = 6.7, 4.9, 1.7 Hz, 1H), 5.84 (d, J = 6.1 Hz, 1H), 4.65 (dd, J = 2.4, 1.6 Hz, 1H), 4.50-4.43 (m, 1H), 4.32 (s, 5H), 4.27 (dt, J = 4.0, 2.5 Hz, 2H), 4.08-4.01 (m, 2H), 1.75 (td, J = 13.2, 6.6 Hz, 1H), 0.97 (d, J = 6.7 Hz, 3H), 0.90 (d, J = 6.8 Hz, 3H). 13C NMR (100 MHz, CDCl3) δ 168.07, 162.16, 148.05, 136.59, 122.27, 121.49, 95.83, 72.41, 71.96, 70.67, 70.38, 70.19, 69.57, 68.23, 66.44, 33.02, 18.72, 18.57; HRMS m/z calcd for C22H24FeN2O2 [M+H]+ 405.1221, found 405.1263.
Compound 5 ' is prepared by compound 1 ', and preparation method is same as above.It there are 452mg, yield 67%.
[α] D 25 = +139.1°(c=0.45, CH2Cl2); 1H NMR (400 MHz, CDCl3) δ 8.53 (d, J = 4.7 Hz, 1H), 8.24 (d, J = 7.9 Hz, 1H), 7.70-7.63 (m, 2H), 7.14 (dd, J = 6.8, 5.0 Hz, 1H), 5.84 (d, J = 7.7 Hz, 1H), 4.65 (dd, J = 2.5, 1.6 Hz, 1H), 4.50-4.43 (m, 1H), 4.32 (s, 5H), 4.28-4.26 (m, 2H), 4.08-4.01 (m, 2H), 1.74 (dt, J = 13.2, 6.6 Hz, 1H), 0.97 (d, J = 6.7 Hz, 3H), 0.90 (d, J = 6.7 Hz, 3H). 13C NMR (100 MHz, CDCl3) δ 168.17, 163.26, 148.45, 136.22, 121.91, 120.84, 92.44, 73.67, 72.38, 71.95, 70.76, 70.70, 70.40, 68.78, 66.94, 32.84, 18.76, 18.60; HRMS m/z calcd for C22H24FeN2O2 [M+H]+ 405.1221, found 405.1261。
Embodiment 6: preparation (R)-{2-[(S) -4- tert-butyl -4,5- dihydro-oxazole base] phenyl-(2- pyridyl group)-first Alcohol 6 and (S)-{2-[(S) -4- tert-butyl -4,5- dihydro-oxazole base] phenyl-(2- pyridyl group)-methanol 6 '
For preparation method with embodiment 5, respectively obtaining target product 6 is crocus solid, total 763g, yield 73%;? It is rufous foaming shape solid, total 623mg, yield 63% to target product 6 '.
Compound 6:[α] D 25 = +416.7° (c=0.45, CH2Cl2); m.p. 129.5-130.3 ºC; 1H NMR (400 MHz, CDCl3) δ 8.58 (d, J = 4.4 Hz, 1H), 8.26 (s, 1H), 7.93 (d, J = 7.8 Hz, 1H), 7.84 (t, J = 7.6 Hz, 1H), 7.26-7.25 (m, 1H), 5.78 (s, 1H), 4.67 (s, 1H), 4.40-4.33 (m, 1H), 4.28 (s, 5H), 4.21-4.15 (m, 2H), 4.05 (dd, J = 9.8, 7.9 Hz, 1H), 3.62 (s, 1H), 0.94 (s, 9H). 13C NMR (100 MHz, CDCl3) δ 168.08, 162.14, 148.07, 136.60, 122.28, 121.50, 96.05, 75.36, 72.54, 70.45, 70.18, 69.49, 68.80, 68.15, 66.42, 33.70, 25.74; HRMS m/z calcd for C23H26FeN2O2 [M+H]+ 419.1377, found 419.1416.
Compound 6 ': [α] D 25 = +102.3° (c=0.15, CH2Cl2); 1H NMR (400 MHz, CDCl3) δ 8.52 (d, J = 4.6 Hz, 1H), 8.25 (s, 1H), 7.70-7.63 (m, 2H), 7.15-7.11 (m, 1H), 5.83 (s, 1H), 4.66 (t, J = 2.0 Hz, 1H), 4.39 (dd, J = 9.7, 8.6 Hz, 1H), 4.32 (s, 5H), 4.28-4.27 (m, 2H), 4.11 (t, J = 8.5 Hz, 1H), 4.02 (dd, J = 9.7, 8.7 Hz, 1H), 0.88 (s, 9H). 13C NMR (100 MHz, CDCl3) δ 168.17, 163.23, 148.49, 136.20, 121.92, 120.93, 92.43, 75.47, 73.59, 72.47, 70.70, 70.42, 68.94, 68.77, 66.87, 33.65, 25.87; HRMS m/z calcd for C23H26FeN2O2 [M+H]+ 419.1377, found 419.1419。
Embodiment 7: preparation (R)-{2-[(S) -4- phenyl -4,5- dihydro-oxazole base] phenyl-(2- pyridyl group)-methanol 7 and (S)-{2-[(S) -4- phenyl -4,5- dihydro-oxazole base] phenyl-(2- pyridyl group)-methanol 7 '
For preparation method with embodiment 5, respectively obtaining target product 7 is rufous foaming shape solid, total 663g, yield 63%;Obtaining target product 7 ' is rufous foaming shape solid, total 513mg, yield 76%.
Compound 7:[α] D 25 = +401.9° (c=0.42, CH2Cl2); 1H NMR (400 MHz, CDCl3) δ 8.59 (t, J = 4.9 Hz, 1H), 7.87-7.84 (m, 1H), 7.78 (td, J = 7.7, 1.6 Hz, 1H), 7.63 (s, 1H), 7.46-7.39 (m, 3H), 7.38-7.35 (m, 1H), 7.31-7.29 (m, 1H), 7.26- 7.23 (m, 1H), 5.90 (d, J = 11.3 Hz, 1H), 5.43-5.32 (m, 1H), 4.83-4.75 (m, 2H), 4.33-4.28 (m, 6H), 4.25-4.21 (m, 1H), 3.83-3.81 (m, 1H). 13C NMR (100 MHz, CDCl3) δ 169.55, 169.49, 162.07, 161.99, 148.02, 142.28, 136.58, 136.54, 128.97, 127.72, 126.43, 122.28, 121.53, 95.61, 74.62, 72.45, 72.29, 70.33, 70.30, 70.20, 70.11, 69.91, 69.34, 69.23, 68.68, 68.60, 66.20, 66.11; HRMS m/ z calcd for C25H22FeN2O2 [M+H]+ 439.1064, found 439.1108.
Compound 7 ': [α] D 25 = +256.7° (c=0.48, CH2Cl2); 1H NMR (400 MHz, CDCl3) δ 8.53 (dd, J = 16.5, 4.7 Hz, 1H), 8.07-7.92 (m, 1H), 7.69-7.66 (m, 1H), 7.57- 7.50 (m, 1H), 7.47-7.40 (m, 2H), 7.38-7.31 (m, 1H), 7.18-7.10 (m, 2H), 5.87 (dd, J = 55.4, 6.2 Hz, 1H), 5.39-5.31 (m, 1H), 4.83-4.72 (m, 2H), 4.43-4.25 (m, 7H), 4.19-4.13 (m, 1H).13C NMR (100 MHz, CDCl3) δ 169.75, 169.69, 163.37, 163.06, 148.40, 142.26, 141.78, 136.44, 136.25, 129.00, 128.65, 127.74, 127.67, 126.67, 126.25, 122.06, 121.82, 120.96, 120.87, 93.07, 92.55, 74.93, 73.77, 73.65, 72.92, 72.45, 70.80, 70.53, 69.25, 69.12, 68.91; HRMS m/z calcd for C25H22FeN2O2 [M+H]+ 439.1064, found 439.1108。
Embodiment 8: preparation (R)-{2-[(S) -4- benzyl -4,5- dihydro-oxazole base] phenyl-(2- pyridyl group)-methanol 8 and (S)-{2-[(S) -4- benzyl -4,5- dihydro-oxazole base] phenyl-(2- pyridyl group)-methanol 8 '
For preparation method with embodiment 5, respectively obtaining target product 8 is rufous foaming shape solid, total 713g, yield 68%;Obtaining target product 8 ' is rufous foaming shape solid, total 243mg, yield 56%.
Compound 8:[α] D 25 = +316.3° (c=0.32, CH2Cl2); 1H NMR (400 MHz, CDCl3) δ 8.60 (d, J = 4.6 Hz, 1H), 7.87 (d, J = 7.8 Hz, 1H), 7.82 (td, J = 7.7, 1.4 Hz, 1H), 7.72 (s, 1H), 7.35-7.31 (m, 2H), 7.27-7.23 (m, 4H), 5.86 (s, 1H), 4.68-4.67 (m, 1H), 4.57 (dt, J = 14.9, 7.5 Hz, 1H), 4.38 (t, J = 8.8 Hz, 1H), 4.26 (s, 5H), 4.19 (t, J = 2.5 Hz, 1H), 4.13-4.09 (m, 1H), 3.75 (s, 1H), 3.12 (dd, J = 13.7, 5.6 Hz, 1H), 2.78 (dd, J = 13.7, 7.8 Hz, 1H). 13C NMR (100 MHz, CDCl3) δ 168.61, 162.14, 148.01, 137.71, 136.58, 129.34, 128.57, 126.59, 122.28, 121.52, 95.52, 72.30, 71.67, 70.25, 70.23, 69.79, 68.45, 67.18, 66.28, 41.69, 29.72; HRMS m/z calcd for C26H24FeN2O2 [M+H]+ 453.1221, found 453.1264.
Compound 8 ': [α] D 25 = +146.8° (c=1.0, CH2Cl2); 1H NMR (400 MHz, CDCl3) δ 8.54 (d, J = 4.7 Hz, 1H), 7.98 (d, J = 7.7 Hz, 1H), 7.68-7.61 (m, 2H), 7.34- 7.31 (m, 2H), 7.27-7.25 (m, 1H), 7.23-7.20 (m, 2H), 7.15 (ddd, J = 6.6, 4.9, 1.7 Hz, 1H), 5.82 (d, J = 7.1 Hz, 1H), 4.65-4.64 (m, 1H), 4.56 (dd, J = 15.3, 7.6 Hz, 1H), 4.41 (t, J = 8.8 Hz, 1H), 4.31 (s, 5H), 4.30-4.28 (m, 2H), 4.08- 4.05 (m, 1H), 3.10 (dd, J = 13.8, 6.0 Hz, 1H), 2.70 (dd, J = 13.8, 8.0 Hz, 1H). 13C NMR (100 MHz, CDCl3) δ 168.76, 163.21, 148.46, 137.76, 136.25, 129.12, 128.63, 126.62, 121.92, 120.86, 92.42, 73.64, 72.50, 72.11, 70.73, 70.46, 68.95, 67.06, 66.70, 41.62; HRMS m/z calcd for C26H24FeN2O2 [M+H]+ 453.1221, found 453.1266。
Embodiment 9: preparation (S)-{2-[(R) -4- isopropyl -4,5- dihydro-oxazole base] phenyl-(2- pyridyl group)-first Alcohol 9
For preparation method with embodiment 5, obtaining target product 9 is rufous foaming shape solid, total 826g, yield 80%.
[α] D 25 = -340° (c=0.12, CH2Cl2); 1H NMR (400 MHz, CDCl3) δ 8.59 (d, J = 4.3 Hz, 1H), 8.15 (d, J = 1.6 Hz, 1H), 7.91 (d, J = 7.8 Hz, 1H), 7.83 (td, J = 7.7, 1.7 Hz, 1H), 7.28-7.24 (m, 1H), 5.79 (s, 1H), 4.68-4.67 (m, 1H), 4.47- 4.41 (m, 1H), 4.28 (s, 5H), 4.17 (t, J = 2.6 Hz, 1H), 4.11-4.04 (m, 2H), 3.67-3.66 (m, 1H), 1.79-1.74 (m, 1H), 1.02 (d, J = 6.7 Hz, 3H), 0.96 (d, J = 6.7 Hz, 3H). 13C NMR (100 MHz, CDCl3) δ 168.06, 162.18, 148.05, 136.57, 122.25, 121.49, 95.84, 72.42, 71.97, 70.65, 70.38, 70.19, 69.57, 68.22, 66.46, 33.02, 18.71, 18.56; HRMS m/z calcd for C22H24FeN2O2 [M+H]+ 405.1221, found 405.1264。
Embodiment 10: preparation (S) -4- isopropyl -2- { 2- [(R)-methoxyl group-(2- pyridyl group) methyl] phenyl } -4, 5- dihydro-oxazole 10
It takes compound 5 (202mg, 0.5 mmol) in one 50 mL history Nike pipes, is added dry THF (5 mL), then It is added NaH (18mg, 0.75 mmol), is stirred at room temperature after ten minutes, is added MeI (60 μ L, 1.0 mmol), gained is mixed It closes after 10 h are stirred at room temperature in object and is quenched with saturated ammonium chloride, anhydrous ether extracts organic phase (3 × 5 mL), anhydrous Na2SO4It is dry Dry, column chromatographic purifying, gained target product is rufous foaming shape solid, total 182mg, yield 87%.
[α] D 25 = +51.7° (c=0.12, CH2Cl2); 1H NMR (400 MHz, CDCl3) δ 8.55 (d, J = 4.7 Hz, 1H), 7.55 (td, J = 7.7, 1.6 Hz, 1H), 7.31 (s, 1H), 7.11 (dd, J = 7.0, 5.3 Hz, 1H), 5.82 (s, 1H), 4.71 (t, J = 2.3 Hz, 2H), 4.34-4.32 (m, 1H), 4.27 (s, 5H), 4.20-4.15 (m, 1H), 4.06-4.02 (m, 1H), 3.96-3.91 (m, 1H), 3.56 (s, 3H), 1.80-1.74 (m, 1H), 0.93 (d, J = 6.8 Hz, 3H), 0.87 (d, J = 6.8 Hz, 3H). 13C NMR (100 MHz, CDCl3) δ 165.46, 161.19, 149.05, 136.21, 122.45, 122.26, 90.67, 81.04, 71.98, 70.48, 69.58, 69.05, 68.83, 57.65, 32.29, 29.73, 18.63, 17.83; HRMS m/z calcd for C23H26FeN2O2 [M+H]+ 419.1377, found 419.1420。
Embodiment 11: ferrocene N involved in the present invention, N ligand answering in the allyl group alkylated reaction of palladium chtalyst Use example
Shown in following reaction equation, [Pd (C is added in 10mL reaction tube3H5)Cl]2(0.02 mmol), ligand 5 After stirring half an hour under nitrogen atmosphere, (E) -1,3- diphenyl acetic acid alkene is added in (0.06 mmol), methylene chloride 2.0mL Propyl ester (0.4 mmol), dimethyl malenate (1.2 mmol), BSA (1.2 mmol) and LiOAc (0.034 mmol). Gained reaction solution reacts 8h at room temperature, and the chemical yield for measuring product is up to 99%, and enantiomeric excess value is up to 98.4%.

Claims (7)

1. ferrocene frame having ferrocene frame chirality N, N ligand shown in general structure (1),
R1For methyl, isopropyl, tert-butyl, cyclohexyl, phenyl, 2,4 dichloro benzene base, benzyl, adamantyl;
R2For hydrogen or the alkyl-substituted silylation of C1-C7;
R3For hydroxyl or the alkoxy of C1-C7;
R4 For hydrogen, the alkyl of C1-C7, aryl or substituted aryl, the aryl is selected from phenyl, benzyl, naphthalene, described substituted Group is selected from phenyl, benzyl, naphthalene, the alkyl of C1-C7, the alkoxy of C1-C7, halogen, nitro, hydroxyl.
2. ferrocene frame having ferrocene frame chirality N, N ligand according to claim 1, it is characterised in that: R2For trimethylsilyl or Hydrogen.
3. ferrocene frame having ferrocene frame chirality N, N ligand according to claim 1, it is characterised in that: R3For methoxyl group or hydroxyl.
4. ferrocene frame having ferrocene frame chirality N, N ligand according to claim 1, it is characterised in that: R4 For the alkyl of C1-C7, C1- The alkoxy of C7, halogen, nitro, the aryl that hydroxyl replaces.
5. ferrocene frame having ferrocene frame chirality N, N ligand according to claim 1, it is characterised in that ferrocene frame having ferrocene frame chirality N, N match Body are as follows:
6. the preparation method of ferrocene frame having ferrocene frame chirality N, N ligand described in claim 1, comprising the following steps:
R1、R2And R4 It is identical as substituent group described in claim 1, R5For the alkyl of C1-C7;
(1) using ferrocenecarboxylic acid as raw material, formed after condensation reaction with chiral amino alcohol Aminylferrocene compound again with In the presence of triphenylphosphine, carbon tetrachloride, triethylamine, ferrocene-oxazoline class compound is generated;
(2) ortho lithiation occurs under that action of n-butyl lithium for above-mentioned ferrocene-oxazoline compound, with R2Cl effect generates crucial Intermediate;
(3) pyridine carboxaldehyde or substituted pyridines formaldehydes chemical combination is added under that action of n-butyl lithium again after lithiumation in above-mentioned intermediate Object generates ferrocene class N, N- ligand through column chromatography for separation.
7. application of ferrocene frame having ferrocene frame chirality N, the N ligand in the allyl group alkylated reaction of palladium chtalyst described in claim 1.
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