CN101591355A - A kind of chiral phosphonate and its synthesis method - Google Patents

A kind of chiral phosphonate and its synthesis method Download PDF

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CN101591355A
CN101591355A CNA2009101171904A CN200910117190A CN101591355A CN 101591355 A CN101591355 A CN 101591355A CN A2009101171904 A CNA2009101171904 A CN A2009101171904A CN 200910117190 A CN200910117190 A CN 200910117190A CN 101591355 A CN101591355 A CN 101591355A
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oxazolinyl
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罗梅
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Hefei University of Technology
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Abstract

一种手性膦酸酯是二苯基膦酸-2-[(4S)-4,5-二氢化-4-R-2-噁唑啉基]苯酚酯,有以下化学式,式中R选自-CH2CH(CH3)2或-CH(CH3)2或-ph或-CH2ph。本化合物的合成方法是首先由2-氰基苯酚和L-氨基醇在无水无氧和催化剂ZnCl2存在时于氯苯溶剂中回流反应24小时制备中间体,然后中间体和二苯基膦酰氯在无水无氧条件下于甲苯和三乙胺混合溶剂中回流反应24小时合成目标产物。本化合物作为手性配体与金属有机化合物形成配合物在扁桃酸不对称合成中表现出良好的催化活性和高对映选择性。

Figure 200910117190

A chiral phosphonate is diphenylphosphonic acid-2-[(4S)-4,5-dihydro-4-R-2-oxazolinyl]phenolate, which has the following chemical formula, where R is selected from From -CH 2 CH(CH 3 ) 2 or -CH(CH 3 ) 2 or -ph or -CH 2 ph. The synthetic method of this compound is at first by 2-cyano phenol and L-amino alcohol in anhydrous anaerobic and catalyst ZnCl 2 exist in chlorobenzene solvent back flow reaction 24 hours to prepare intermediate, then intermediate and diphenylphosphine The acid chloride was refluxed in a mixed solvent of toluene and triethylamine under anhydrous and oxygen-free conditions for 24 hours to synthesize the target product. The compound forms a complex with a metal organic compound as a chiral ligand and exhibits good catalytic activity and high enantioselectivity in the asymmetric synthesis of mandelic acid.

Figure 200910117190

Description

A kind of chiral phosphonate and synthetic method thereof
One, technical field
The present invention relates to a kind of chipal compounds and preparation method thereof, specifically a kind of phosphonic acid ester and synthetic method thereof that contains the chiral oxazoline base.
Two, background technology
The title complex of chiral oxazoline and metal (shows the active and high enantioselectivity of good asymmetry catalysis, thereby is subjected to paying close attention to widely at Didls-Alder in the many reactions such as diene cycloaddition reaction, Michael (Mi Xieer) condensation reaction, Friedel-Crafts (Fu Ruide-carat Buddhist now) condensation reaction, Aldol (alcohol aldehyde) condensation reaction of Di Lesi-Ai Erte).
The applicant is engaged in the development of asymmetric compound for a long time, and patent of invention, ZL200610096004.X, CN101016311A, CN101099936A, 200810020198.4, CN101279954A, 200810022278.3,200910116614.5 have been applied for successively.
Three, summary of the invention
The present invention is intended to provide a kind of efficient chiral catalyst for the asymmetric synthesis field particularly prepares the chiral drug compound, technical problem to be solved be select and the synthesis of chiral part with the preparation composition catalyst.
The alleged chiral phosphine compound of the present invention is that chemical name is a phenylbenzene phosphonic acids-2-[(4S)-4,5-dihydro-4-R-2-oxazolinyl] phenol ester, following chemical structural formula is arranged:
R is selected from-CH in the formula 2CH (CH 3) 2(1 ', 1 '-dimethyl ethyl) or-CH (CH 3) 2(1 '-methylethyl) or-Ph (phenyl) or-CH 2Ph (benzyl).
This compound can form title complex with organometallics and show good catalytic activity and high enantioselectivity in the amygdalic acid asymmetric synthesis as chiral ligand.
The synthetic method of this chiral phosphine compound was two steps, the first step is with 2-4-hydroxy-benzonitrile (2-cyanophenol) and L-amino alcohol prepared in reaction intermediate 2-[(4S)-4,5-dihydro-4-R-2-oxazolinyl] phenol, above-mentioned intermediate of second step and diphenyl phosphonyl chloride are [(Ph) 2POCl] synthetic target product, flow process schematically as follows:
Figure A20091011719000041
Described L-amino alcohol is selected from L-leucinol or L-valerian ammonia alcohol or L-benzene glycinol or L-phenylalaninol.Closed-loop shaped oxazoline base when above-mentioned each L-amino alcohol reacts with the 2-cyanophenol respectively, the R base that it carries is followed successively by-CH 2CH (CH 3) 2,-CH (CH 3) 2,-Ph and-CH 2Ph.
The synthetic method of this chiral phosphine compound is first synthetic target product behind the preparation intermediate, comprises reaction, separation and purifying, the reaction that it is characterized in that preparing intermediate by 2-cyanophenol and L-amino alcohol under the anhydrous and oxygen-free condition and the anhydrous ZnCl of catalyzer 2When existing in chlorobenzene solvent back flow reaction 24 hours, separate then, purifying, i.e. reaction is sloughed chlorobenzene after finishing, chloroform extraction is used in the back that is dissolved in water, and uses column chromatography purification behind the extraction phase precipitation; The reaction of synthetic target product be prepared intermediate with diphenyl phosphonyl chloride under the anhydrous and oxygen-free condition in toluene and triethylamine mixed solvent back flow reaction 24 hours, separate then, purifying, i.e. slough solvent after the reaction end, use column chromatography purification.
Four, description of drawings
Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 8, Figure 11, Figure 14 are respectively intermediate 1a, 1b, 1c, 1d and compound 2a, 2b, 2c, 2d 1HNMR figure.
Fig. 6, Fig. 9, Figure 12, Figure 15, be compound 2a, 2b, 2c, 2d respectively 13CNMR figure.
Fig. 7, Figure 10, Figure 13, Figure 16, be compound 2a, 2b, 2c, 2d respectively 31PNMR figure
Five, embodiment
(1) preparation of intermediate 1a~1d
1, intermediate 1a 2-[(4S)-4,5-dihydro-4-(1 ', 1 '-dimethyl ethyl)-the 2-oxazolinyl] preparation of phenol:
In the 100mL two-mouth bottle, under the anhydrous and oxygen-free condition, add anhydrous ZnCl 260mg (0.37mmol), the 40mL chlorobenzene, 2-cyanophenol 1.0g (5.6mmol), L-leucinol 3g, temperature rising reflux reaction 24h, stopped reaction, decompression is desolvated to remove, and residuum is dissolved in water, and uses CHCl 3(30mL * 2) extraction, the organic phase anhydrous sodium sulfate drying, rotation removes and desolvates, and thick product with sherwood oil/methylene dichloride (4: 1) column chromatography, is got colourless oil liquid 0.85g, productive rate 44%; [a] 5 D=-48.67 ° of (c=0.54, CHCl 3): 1HNMR (500MHz, CDCl 3, 27 ℃), and δ (ppm)=12.30 (s, 1H), 7.63~7.65 (d, J=8Hz, 1H), 7.36 (t, J=0.5Hz, 1H), 7.00~7.02 (d, J=8Hz, 1H), 6.86 (t, J=0Hz, 1H), 4.47 (t, J=0.5Hz, 1H), 4.37~4.3 (m, 1H), 3.93 (t, J=0.5Hz, 1H), 1.84~1.87 (m, 1H), 1.61~1.66 (m, 1H), 0.98~1.00 (m, J=11,6H).
2, intermediate 1b 2-[(4S)-4,5-dihydro-4-(1 '-methylethyl)-2-oxazolinyl] preparation of phenol:
Get 2-cyanophenol 1.0g (5.6mmol), L-valerian ammonia alcohol 3g, the preparation method is with example 1.Productive rate 56%.[a] 5 D=-28.6°(c=0.64,CHCl 3):
1H?NMR(500MHz,CDCl 3,27℃),δ(ppm)=12.38(s,1H),7.66~7.68(dd,J=2.5,2.5Hz,1H),7.38(t,1H),7.06~7.03(d,J=14Hz,1H),6.89(t,1H),4.39~4.42(m,1H),4.12~4.13(m,2H),1.78~1.82(m,1H),0.96~1.06(dd,J=11,11.5Hz,1H).
3, intermediate 1c 2-[(4S)-4,5-dihydro-4-(phenyl)-2-oxazolinyl] preparation of phenol:
Get 2-cyanophenol 1.0g, L-benzene glycinol 3g, reactions steps is with example 1, productive rate 55%; [a] 5 D=-23.4 ° of (c=0.35, CHCl 3):
1HNMR(500MHz,CDCl 3,27℃),δ(ppm)=12.36(s,1H),7.87~7.88(d,J=2.5Hz,1H),7.34~7.49(m,6H),7.17~7.20(d,J=14Hz,1H),7.00(t,1H),5.44~5.50(m,1H),4.78(t,J=2Hz,1H),4.26(t,1H).
4, intermediate 1d 2-[(4S)-4,5-dihydro-4-(benzyl)-2-oxazolinyl] preparation of phenol:
Get 2-cyanophenol 1.0g, L-phenylalaninol 3g, reactions steps is with example 1, productive rate 60%; [a] 5 D=-3.07 ° of (c=1.13, CHCl 3):
1HNMR(500MHz,CDCl 3,27℃),δ(ppm)=12.22(s,1H),7.64(d,J=8Hz,1H),7.25~7.41(m,6H),7.04~7.06(d,J=8Hz,1H),6.89(t,1H),4.61~4.64(m,1H),4.39(t,J=0.5Hz,1H),3.10~3.14(q,1H),2.81~2.85(q,1H).
(2) compound 2a~2d's is synthetic
5, compound 2a phenylbenzene phosphonic acids-2-[(4S)-4,5-dihydro-4-(1 ', 1 '-dimethyl ethyl)-the 2-oxazolinyl] phenol ester synthetic:
In the 100mL two-mouth bottle, under the anhydrous and oxygen-free condition, add 40mL toluene, 2-[(4S)-4,5-dihydro-4-(1 ', 1 '-dimethyl ethyl)-the 2-oxazolinyl] phenol (intermediate 1a) 2g (9.17mmol), triethylamine 20mL, phenylbenzene phosphono 1.0mL (6.96mmol) is with the mixture heating up 24h that refluxes, stopped reaction, decompression is desolvated to remove, thick product with sherwood oil/methylene dichloride (1: 9) column chromatography, is got weak yellow liquid 1.16g, productive rate 40%; [a] 5 D=-17.68 ° of (c=0.27, CHCl 3):
1HNMR(500MHz,CDCl 3,27℃),δ(ppm)=8.04~8.07(m,3H),7.74~7.76(d,J=8Hz,1H),7.74(d,J=8Hz,1H),7.66(d,J=8.5Hz,1H),7.40~7.42(m,5H),7.26~7.29(m,1H),7.08(t,J=0.5Hz,1H),4.38~4.46(m,2H),3.90(t,1H),1.86~1.89(m,1H),1.73~1.76(m,1H),1.39~1.42(m,1H),0.96~1.02(dd,J=6.5Hz,6.5Hz,6H), 13CNMR(125MHz,CDCl 3,27℃)160.98,149.95(x2),132.34(x2),132.12(x2),131.25(x2),128.46(x2),128.34(x2),124.16(x2),121.64(x2),120.18(x2),56.63,45.79,39.72,25.22,22.45,22.32. 13PNMR:25.413,IR(KBr):2970,2917,2849,2251,1679,1612,1588,1462,1440,1390,11313,1273,1221,1124,1063,1031,789,733,691,649,621,592,570,528;HRMS(EI):m/z(%):calcd?for?C 25H 26NO 3P:419.1650;found:419.1659.
6, compound 2b phenylbenzene phosphonic acids-2-[(4S)-4,5-dihydro-4-(1 '-methylethyl)-2-oxazolinyl] phenol ester synthetic:
Intermediate 2-[(4S)-4,5-dihydro-4-(1 '-methylethyl)-2-oxazolinyl] synthetic method of phenol (intermediate 1b) and diphenyl phosphonyl chloride is with example 5.
Weak yellow liquid, productive rate 38%; [a] 5 D=-20.27 ° of (c=0.28, CHCl 3):
1HNMR(500MHz,CDCl 3,27℃)δ(ppm)=7.60~7.68(m,5H),7.24~7.36(m,7H),6.99(J=8.5,1H),6.84((t,1H),4.28~4.43(m,1H),4.08~4.14(m,2H),1.76~1.82(m,1H),0.92~1.00(dd,J=7Hz,6.5Hz,6H). 13CNMR(125MHz,CDCl 3,27℃)165.16,160.05(x2),133.32(x2),131.37(x2),131.27(x2),128.28(x2),128.14(x2),128.05(x2),118.62(x2),116.78(x2),71.62,69.94,33.10,18.78,18.66, 13PNMR(300MHz,CDCl 3,27℃)δ(ppm)=23.18.IR(KBr):3057,2959,2926,2872,1676,1644,1618,1583,1555,1492,1464,1438,1364,1438,1364,1309,1260,1233,1201,1155,1094,1069,1035,999,959,911,859,830,800,755,728;HRMS(EI):m/z(%):calcd?forC 24H 24NO 3P:405.1494;found:405.1502.
7, compound 2c phenylbenzene phosphonic acids-2-[(4S)-4,5-dihydro-4-(phenyl)-2-oxazolinyl] phenol ester synthetic:
Intermediate 2-[(4S)-4,5-dihydro-4-(phenyl)-2-oxazolinyl] synthetic method of phenol (intermediate 1c) and diphenyl phosphonyl chloride is with example 5.
Weak yellow liquid, productive rate 42%; [a] 5 D=19.38 ° of (c=0.05, CHCl 3):
1HNMR(500MHz,CDCl 3,27℃)δ(ppm)=8.00~8.07(m,3H),7.88(d,J=7.5Hz,1H),7.72(d,J=8.5Hz,2H),7.10~7.46(m,12H),4.28(m,1H),5.46(t,J=1.5Hz,1H),4.74~4.77(m,1H),4.25(t,J=0.5Hz,1H). 13CNMR(125MHz,CDCl 3,27℃)166.41,160.20,141.68,133.71,131.36,131.25,128.94,128.29,128.16(x2),127.96(x2),126.57,118.78,116.96,74.12,68.95. 13PNMR(300MHz,CDCl 3,27℃),δ(ppm)=25.56.IR(KBr):3064,3033,2956,2924,2854,2250,1684,1643,1612,1590,1537,1495,1479,1461,1440,1378,1304,1274,1249,1221,1138,1156,1126,1070,1030,909,793,754,734,698,648,626,557,527.;HRMS(EI):m/z(%):calcd?forC 27H 23NO 3P:440.1416;found:440.1385.
8, compound 2d phenylbenzene phosphonic acids-2-[(4S)-4,5-dihydro-4-(benzyl)-2-oxazolinyl] phenol ester synthetic:
Intermediate 2-[(4S)-4,5-dihydro-4-(benzyl)-2-oxazolinyl] synthetic method of phenol (intermediate 1d) and diphenyl phosphonyl chloride is with example 5.
Weak yellow liquid, productive rate 45%; [a] 5 D=14.04 ° of (c=0.14, CHCl 3):
1HNMR(500MHz,CDCl 3,27℃)δ(ppm)=7.61~7.70(m,5H),7.23~7.38(m,11H),7.00(d,J=8Hz,1H),6.86(t,J=0.5Hz,2H),4.60~4.64(m,1H),4.39(t,J=0.5Hz,1H),4.14(t,J=0.5Hz,2H),3.09~3.13(m,1H),2.79~2.84(m,.1H), 13CNMR(125MHz,CDCl 3,27℃)165.55,160.01(x2),137.64(x2),133.48(x2),131.34(x2),131.24(x2),129.30(x2),128.72(x2),128.27(x2),128.11()x2),126.78(x2),118.70(x2),116.84(x2),71.28,66.82,42.00. 13PNMR(300MHz,CDCl 3,27℃),δ(ppm)=23.205.IR(KBr):3061,3028,2955,2924,2854,1642,1617,1492,1438,1367,1311,1259,1234,1156,1129,1067,960,756,727,698.HRMS(EI):m/z(%):calcd?forC 28H 24NO 3P:453.1494;found:454.1522

Claims (2)

1、一种手性膦酸酯,其特征是名称为二苯基膦酸-2-[(4S)-4,5-二氢化-4-R-2-噁唑啉基]苯酚酯,有以下化学结构式:1. A chiral phosphonate, characterized in that the name is diphenylphosphonic acid-2-[(4S)-4,5-dihydro-4-R-2-oxazolinyl]phenol ester, which has The following chemical structural formula:
Figure A2009101171900002C1
Figure A2009101171900002C1
式中R选自-CH2CH(CH3)2或-CH(CH3)2或-ph或-CH2ph。In the formula, R is selected from -CH 2 CH(CH 3 ) 2 or -CH(CH 3 ) 2 or -ph or -CH 2 ph.
2、一种由权利要求1所述的手性膦酸酯的合成方法是先制备中间体后合成目标产物,包括反应、分离和纯化,其特征在于:制备中间体2-[(4S)-4,5-二氢化-4-R-2-噁唑啉基]苯酚的反应是由2-氰基苯酚和L-氨基醇在无水无氧条件下和催化剂无水ZnCl2存在时于氯苯溶剂中回流24小时,所述的L-氨基醇选自L-亮氨醇或L-缬氨醇或L-苯甘氨醇或L-苯丙氨醇;合成目标产物的反应是上述中间体与二苯基膦酰氯在无水无氧条件下于甲苯和三乙胺混合溶剂中回流反应24小时。2, a kind of synthetic method of the chiral phosphonate described in claim 1 is to synthesize target product after first preparing intermediate, comprise reaction, separation and purification, it is characterized in that: prepare intermediate 2-[(4S)- The reaction of 4,5-dihydro-4-R-2-oxazolinyl]phenol is formed by the reaction of 2-cyanophenol and L-aminoalcohol under anhydrous and anaerobic conditions and in the presence of catalyst anhydrous ZnCl2 in chlorine Reflux 24 hours in benzene solvent, described L-aminoalcohol is selected from L-leucinol or L-valinol or L-phenylglycinol or L-phenylalaninol; The reaction of synthetic target product is above-mentioned intermediate The body and diphenylphosphonyl chloride were refluxed in a mixed solvent of toluene and triethylamine under anhydrous and oxygen-free conditions for 24 hours.
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101962391A (en) * 2010-03-17 2011-02-02 合肥工业大学 A chiral phosphine compound
CN102127111A (en) * 2010-11-30 2011-07-20 罗梅 Chiral phosphonate compound
CN102351898A (en) * 2011-08-29 2012-02-15 罗梅 Synthesis method of diphenyl phosphonic acid
CN103965243A (en) * 2014-06-02 2014-08-06 罗梅 Chiral phosphonate crystal compound and use
CN105524092A (en) * 2016-02-22 2016-04-27 合肥祥晨化工有限公司 Synthesis method of chiral zinc complex crystal

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101962391A (en) * 2010-03-17 2011-02-02 合肥工业大学 A chiral phosphine compound
CN101962391B (en) * 2010-03-17 2012-09-26 合肥工业大学 Chiral phosphorus compound
CN102127111A (en) * 2010-11-30 2011-07-20 罗梅 Chiral phosphonate compound
CN102127111B (en) * 2010-11-30 2013-01-09 罗梅 Chiral phosphonate compound
CN102351898A (en) * 2011-08-29 2012-02-15 罗梅 Synthesis method of diphenyl phosphonic acid
CN103965243A (en) * 2014-06-02 2014-08-06 罗梅 Chiral phosphonate crystal compound and use
CN105524092A (en) * 2016-02-22 2016-04-27 合肥祥晨化工有限公司 Synthesis method of chiral zinc complex crystal

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