CN114014773A - 一种n-乙酰-l-天门冬氨酸的制备方法 - Google Patents
一种n-乙酰-l-天门冬氨酸的制备方法 Download PDFInfo
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- OTCCIMWXFLJLIA-BYPYZUCNSA-N N-acetyl-L-aspartic acid Chemical compound CC(=O)N[C@H](C(O)=O)CC(O)=O OTCCIMWXFLJLIA-BYPYZUCNSA-N 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- CKLJMWTZIZZHCS-UHFFFAOYSA-N D-OH-Asp Natural products OC(=O)C(N)CC(O)=O CKLJMWTZIZZHCS-UHFFFAOYSA-N 0.000 claims abstract description 12
- CKLJMWTZIZZHCS-UWTATZPHSA-N L-Aspartic acid Natural products OC(=O)[C@H](N)CC(O)=O CKLJMWTZIZZHCS-UWTATZPHSA-N 0.000 claims abstract description 12
- CKLJMWTZIZZHCS-REOHCLBHSA-N L-aspartic acid Chemical compound OC(=O)[C@@H](N)CC(O)=O CKLJMWTZIZZHCS-REOHCLBHSA-N 0.000 claims abstract description 12
- 229960005261 aspartic acid Drugs 0.000 claims abstract description 12
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 54
- 238000006243 chemical reaction Methods 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 15
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 claims description 15
- 239000012074 organic phase Substances 0.000 claims description 15
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 14
- 239000002904 solvent Substances 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 14
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- QWXYZCJEXYQNEI-OSZHWHEXSA-N intermediate I Chemical compound COC(=O)[C@@]1(C=O)[C@H]2CC=[N+](C\C2=C\C)CCc2c1[nH]c1ccccc21 QWXYZCJEXYQNEI-OSZHWHEXSA-N 0.000 claims description 10
- SJRJJKPEHAURKC-UHFFFAOYSA-N N-Methylmorpholine Chemical compound CN1CCOCC1 SJRJJKPEHAURKC-UHFFFAOYSA-N 0.000 claims description 9
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 9
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 7
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- JGFZNNIVVJXRND-UHFFFAOYSA-N N,N-Diisopropylethylamine (DIPEA) Chemical compound CCN(C(C)C)C(C)C JGFZNNIVVJXRND-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 5
- 230000021736 acetylation Effects 0.000 claims description 5
- 238000006640 acetylation reaction Methods 0.000 claims description 5
- 239000008346 aqueous phase Substances 0.000 claims description 5
- VBZWSGALLODQNC-UHFFFAOYSA-N hexafluoroacetone Chemical compound FC(F)(F)C(=O)C(F)(F)F VBZWSGALLODQNC-UHFFFAOYSA-N 0.000 claims description 5
- 239000001632 sodium acetate Substances 0.000 claims description 5
- 235000017281 sodium acetate Nutrition 0.000 claims description 5
- 239000003153 chemical reaction reagent Substances 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 4
- 150000007522 mineralic acids Chemical class 0.000 claims description 4
- 230000003472 neutralizing effect Effects 0.000 claims description 4
- 150000007530 organic bases Chemical class 0.000 claims description 4
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 claims description 3
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 3
- WETWJCDKMRHUPV-UHFFFAOYSA-N acetyl chloride Chemical compound CC(Cl)=O WETWJCDKMRHUPV-UHFFFAOYSA-N 0.000 claims description 3
- 239000012346 acetyl chloride Substances 0.000 claims description 3
- 229960001701 chloroform Drugs 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 6
- 239000002994 raw material Substances 0.000 abstract description 4
- 230000010933 acylation Effects 0.000 abstract description 2
- 238000005917 acylation reaction Methods 0.000 abstract description 2
- 238000010511 deprotection reaction Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 16
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 7
- 239000007787 solid Substances 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 230000005587 bubbling Effects 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 230000008034 disappearance Effects 0.000 description 3
- IAZDPXIOMUYVGZ-WFGJKAKNSA-N Dimethyl sulfoxide Chemical compound [2H]C([2H])([2H])S(=O)C([2H])([2H])[2H] IAZDPXIOMUYVGZ-WFGJKAKNSA-N 0.000 description 2
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 description 2
- 210000004556 brain Anatomy 0.000 description 2
- 239000002207 metabolite Substances 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 238000005160 1H NMR spectroscopy Methods 0.000 description 1
- 238000005481 NMR spectroscopy Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910000042 hydrogen bromide Inorganic materials 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 210000000653 nervous system Anatomy 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D263/00—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings
- C07D263/02—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings
- C07D263/08—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
- C07D263/16—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D263/18—Oxygen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C231/00—Preparation of carboxylic acid amides
- C07C231/12—Preparation of carboxylic acid amides by reactions not involving the formation of carboxamide groups
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- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
本发明涉及一种N‑乙酰‑L‑天门冬氨酸的制备方法,具体涉及以L‑天门冬氨酸为原料,经保护、酰化和脱保护三步高效合成N‑乙酰‑L‑天门冬氨酸,本发明提供的N‑乙酰‑L‑天门冬氨酸的制备方法是一种高产率、低成本、三废少、产品质量好和适宜工业化的制备方法。
Description
技术领域
本发明属于医药领域,具体涉及一种N-乙酰-L-天门冬氨酸的制备方法。
背景技术
N-乙酰-L-天门冬氨酸(N-acetylaspartate, NAA)是一种在大脑中大量存在的代谢物,其作为一种反映神经系统功能情况的重要标志物,广泛应用于核磁共振波谱(protonmagnetic resonance spectroscopy,1H MRS)技术对脑内代谢产物的分析中。
目前N-乙酰-L-天门冬氨酸常规的合成路线如下:
方法1:
该方法以L-天门冬氨酸为原料,经溴化氢成盐保护,醋酐乙酰化后再水解,产率58%。该方法具有步骤长、三废多、收率低等缺点。
方法2:
该方法以L-天门冬氨酸为原料,经超声后直接生成N-乙酰-L-天门冬氨酸。该方法需要特殊设备,不利于规模化生产。
发明内容
针对上述问题,本发明公开了一种N-乙酰-L-天门冬氨酸的制备方法,具体以L-天门冬氨酸为原料,经保护、酰化和脱保护三步高效合成N-乙酰-L-天门冬氨酸,本发明提供的N-乙酰-L-天门冬氨酸的制备方法是一种高产率、低成本、三废少、产品质量好和适宜工业化的制备方法。
反应方程式如下:
本发明解决以上技术问题的技术方案是:
(1)在反应瓶中加入溶剂Ⅰ,加入L-天冬氨酸1.0mol,保持温度10℃~50℃条件下通入六氟丙酮;反应完毕后,回收溶剂Ⅰ后,加二氯甲烷800ml和水300ml,搅拌并分液,再以二氯甲烷400ml萃取水相一次,合并有机相并干燥,浓缩得中间体Ⅰ;
(2)取中间体Ⅰ0.70-0.92mol加入溶剂Ⅱ中,加入有机碱0.77-1.4mol,保持温度0℃~50℃条件下滴加乙酰化试剂0.75-1.3mol;反应完毕后,加水400ml,搅拌并分液,有机相干燥后浓缩得中间体Ⅱ;
(3)在反应瓶中加入溶剂Ⅲ和水,搅拌下加入无机酸1.2-1.7mol,然后加入中间体Ⅱ0.58-0.85mol,保持温度20℃~80℃条件下反应;反应完毕,以醋酸钠中和至pH=3-4,减压浓缩干,加二氯甲烷1000ml和水200ml萃取分液,有机相减压浓缩至干,以醋酸300ml重结晶后干燥,得N-乙酰-L-天门冬氨酸。
步骤(1)中所述溶剂Ⅰ为DMSO、四氢呋喃、二氧六环中的一种。
步骤(2)中所述溶剂Ⅱ为二氯甲烷、二氯乙烷、三氯甲烷中的一种。
步骤(2)中所述有机碱为三乙胺、N-甲基吗啉、N,N-二异丙基乙胺中的一种。
步骤(2)中所述乙酰化试剂为乙酸酐、乙酰氯中的一种。
步骤(3)中所述溶剂Ⅲ为二氧六环、四氢呋喃中的一种。
步骤(3)中所述无机酸为盐酸、硫酸中的一种。
本发明一种N-乙酰-L-天门冬氨酸的制备方法优点:
1)步骤短;
2)三废少;
3)成本低、收率高;
4)产品质量好。
具体实施方式
以下结合具体实施例对本发明作进一步说明。
实施例1
一种N-乙酰-L-天门冬氨酸的制备方法,具体包括以下步骤:
(1)反应瓶中加DMSO 665ml和L-天冬氨酸133.0g,搅拌并冷却至10-20℃,缓缓鼓泡通入六氟丙酮4小时。TLC确认L-天冬氨酸完全消失,再搅拌2小时。鼓泡通入氮气1小时后,70℃以下减压回收DMSO,底液冷至室温,加二氯甲烷800ml和水300ml,充分摇匀后静置分液。再以二氯甲烷400ml萃取水相一次,合并有机相后以无水硫酸钠干燥,浓缩至干,得中间体Ⅰ,类白色固体259.1g,产率92.2%。
(2)反应瓶中加入二氯甲烷1300ml和中间体Ⅰ259.1g,搅拌溶解,加三乙胺141.4g,在0-10℃条件下滴加乙酸酐132.6g,加毕搅拌反应24小时。冷至室温,加水400ml,搅拌并分液,有机相以无水硫酸钠干燥,浓缩至干,得中间体Ⅱ,类白色固体276.9g,产率93.0%。
(3)反应瓶中加入二氧六环1400ml和水50ml,搅拌加入质量浓度37%的盐酸147.1ml,再加入中间体Ⅱ 276.9g,20-30℃反应36小时,以醋酸钠中和至pH=3-4,减压浓缩至干,加二氯甲烷1000ml和水200ml萃取分液,有机相减压浓缩至干,以醋酸300ml重结晶,得N-乙酰-L-天门冬氨酸131.7g,产率87.8%。白色粉末,熔点140-142℃,C(c=1,AcOH)=51º,1HNMR (400 MHz, DMSO-d6) δ:12.54 (s, 2H), 8.21 (d, J = 7.9 Hz, 1H), 4.66-4.32(m, 1H), 2.67 (dd, J = 16.5, 5.6 Hz, 1H), 2.55 (dd, J = 16.5, 7.3 Hz, 1H),1.83 (s, 3H).
实施例2
一种N-乙酰-L-天门冬氨酸的制备方法,具体包括以下步骤:
(1)反应瓶中加四氢呋喃1000ml和L-天冬氨酸133.0g,搅拌并冷却至20-30℃,缓缓鼓泡通入六氟丙酮4小时。TLC确认L-天冬氨酸完全消失,再搅拌2小时。鼓泡通入氮气1小时后,50℃以下减压回收四氢呋喃,底液冷至室温,加二氯甲烷800ml和水300ml,充分摇匀后静置分液。再以二氯甲烷400ml萃取水相一次,合并有机相后以无水硫酸钠干燥,旋干,得中间体Ⅰ,类白色固体244.2g,产率86.9%。
(2)反应瓶中加入二氯乙烷1700ml和中间体Ⅰ244.2g,搅拌溶解,加N-甲基吗啉101.2g,在20-30℃条件下滴加乙酸酐104.3g,加毕搅拌反应24小时。冷至室温,加水400ml,搅拌并分液,有机相以无水硫酸钠干燥,浓缩至干,得中间体Ⅱ,类白色固体215.8g,产率76.9%。
(3)反应瓶中加入二氧六环1600ml和水250ml,搅拌加入质量浓度98%的硫酸79ml,然后加入中间体Ⅱ 215.8g,40-50℃反应36小时,以醋酸钠中和至pH=3-4,减压浓缩至干,加二氯甲烷1000ml和水200ml萃取分液,有机相减压浓缩至干,以醋酸300ml重结晶,得N-乙酰-L-天门冬氨酸92.3g,产率78.9%。
实施例3
一种N-乙酰-L-天门冬氨酸的制备方法,具体包括以下步骤:
(1)反应瓶中加二氧六环1330ml和L-天冬氨酸133.0g,搅拌并升温至40-50℃,缓缓鼓泡通入六氟丙酮4小时。TLC确认L-天冬氨酸完全消失,再搅拌2小时。鼓泡通入氮气1小时后,60℃以下减压回收二氧六环,底液冷至室温,加二氯甲烷800ml和水300ml,充分摇匀后静置分液。再以二氯甲烷400ml萃取水相一次,合并有机相后以无水硫酸钠干燥,旋干,得中间体Ⅰ,类白色固体198.8g,产率70.74%。
(2)反应瓶中加入三氯甲烷2000ml和中间体Ⅰ198.8g,搅拌溶解,加N,N-二异丙基乙胺99.3g,在40-50℃条件下滴加乙酰氯58.9g,加毕搅拌反应24小时。冷至室温,加水400ml,搅拌并分液,有机相以无水硫酸钠干燥,浓缩至干,得中间体Ⅱ,类白色固体190.1g,产率83.2%。
(3)反应瓶中加入四氢呋喃1900ml和水300ml,搅拌加入质量浓度98%的硫酸63.4ml,搅拌下加入中间体Ⅱ 190.1g,70-80℃反应24小时,以醋酸钠中和至pH=3-4,减压浓缩至干,加二氯甲烷1000ml和水200ml萃取分液,有机相减压浓缩至干,以醋酸300ml重结晶,得N-乙酰-L-天门冬氨酸89.8g,产率87.2%。
Claims (7)
1.一种N-乙酰-L-天门冬氨酸的制备方法,其特征在于:具体包括以下步骤:
在反应瓶中加入溶剂Ⅰ,加入L-天冬氨酸1.0mol,保持温度10℃~50℃条件下通入六氟丙酮;反应完毕后,回收溶剂Ⅰ后,加二氯甲烷800ml和水300ml,搅拌并分液,再以二氯甲烷400ml萃取水相一次,合并有机相并干燥,浓缩得中间体Ⅰ;
取中间体Ⅰ0.70-0.92mol加入溶剂Ⅱ中,加入有机碱0.77-1.4mol,保持温度0℃~50℃条件下滴加乙酰化试剂0.75-1.3mol;反应完毕后,加水400ml,搅拌并分液,有机相干燥后浓缩得中间体Ⅱ;
在反应瓶中加入溶剂Ⅲ和水,搅拌下加入无机酸1.2-1.7mol,然后加入中间体Ⅱ0.58-0.85mol,保持温度20℃~80℃条件下反应;反应完毕,以醋酸钠中和,减压浓缩干,加二氯甲烷1000ml和水200ml萃取分液,有机相减压浓缩至干,以醋酸300ml重结晶后干燥,得N-乙酰-L-天门冬氨酸。
2.根据权利要求1所述的N-乙酰-L-天门冬氨酸的制备方法,其特征在于:步骤(1)中所述溶剂Ⅰ为DMSO、四氢呋喃、二氧六环中的一种。
3.根据权利要求1所述的N-乙酰-L-天门冬氨酸的制备方法,其特征在于:步骤(2)中所述溶剂Ⅱ为二氯甲烷、二氯乙烷、三氯甲烷中的一种。
4.根据权利要求1所述的N-乙酰-L-天门冬氨酸的制备方法,其特征在于:步骤(2)中所述有机碱为三乙胺、N-甲基吗啉、N,N-二异丙基乙胺中的一种。
5.根据权利要求1所述的N-乙酰-L-天门冬氨酸的制备方法,其特征在于:步骤(2)中所述乙酰化试剂为乙酸酐、乙酰氯中的一种。
6.根据权利要求1所述的N-乙酰-L-天门冬氨酸的制备方法,其特征在于:步骤(3)中所述溶剂Ⅲ为二氧六环、四氢呋喃中的一种。
7.根据权利要求1所述的N-乙酰-L-天门冬氨酸的制备方法,其特征在于:步骤(3)中所述无机酸为盐酸、硫酸中的一种。
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