CN115557882A - 一种(R)-1-Boc-3-氨基哌啶的制备方法 - Google Patents
一种(R)-1-Boc-3-氨基哌啶的制备方法 Download PDFInfo
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- AKQXKEBCONUWCL-MRVPVSSYSA-N tert-butyl (3r)-3-aminopiperidine-1-carboxylate Chemical compound CC(C)(C)OC(=O)N1CCC[C@@H](N)C1 AKQXKEBCONUWCL-MRVPVSSYSA-N 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 52
- 239000002994 raw material Substances 0.000 claims abstract description 20
- DYHSDKLCOJIUFX-UHFFFAOYSA-N tert-butoxycarbonyl anhydride Chemical compound CC(C)(C)OC(=O)OC(=O)OC(C)(C)C DYHSDKLCOJIUFX-UHFFFAOYSA-N 0.000 claims abstract description 18
- 150000001875 compounds Chemical class 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 15
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 11
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 11
- DRSHXJFUUPIBHX-UHFFFAOYSA-N COc1ccc(cc1)N1N=CC2C=NC(Nc3cc(OC)c(OC)c(OCCCN4CCN(C)CC4)c3)=NC12 Chemical compound COc1ccc(cc1)N1N=CC2C=NC(Nc3cc(OC)c(OC)c(OCCCN4CCN(C)CC4)c3)=NC12 DRSHXJFUUPIBHX-UHFFFAOYSA-N 0.000 claims abstract description 10
- NLFBCYMMUAKCPC-KQQUZDAGSA-N ethyl (e)-3-[3-amino-2-cyano-1-[(e)-3-ethoxy-3-oxoprop-1-enyl]sulfanyl-3-oxoprop-1-enyl]sulfanylprop-2-enoate Chemical compound CCOC(=O)\C=C\SC(=C(C#N)C(N)=O)S\C=C\C(=O)OCC NLFBCYMMUAKCPC-KQQUZDAGSA-N 0.000 claims abstract description 10
- IWYDHOAUDWTVEP-SSDOTTSWSA-N (R)-mandelic acid Chemical compound OC(=O)[C@H](O)C1=CC=CC=C1 IWYDHOAUDWTVEP-SSDOTTSWSA-N 0.000 claims abstract description 6
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- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 24
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- 150000007942 carboxylates Chemical class 0.000 claims description 22
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- 238000003756 stirring Methods 0.000 claims description 19
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 239000002904 solvent Substances 0.000 claims description 16
- 238000001914 filtration Methods 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 12
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 12
- 239000007864 aqueous solution Substances 0.000 claims description 12
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 10
- 238000000967 suction filtration Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- APFUDGDIIFSTSD-MRVPVSSYSA-N tert-butyl (3r)-3-carbamoylpiperidine-1-carboxylate Chemical compound CC(C)(C)OC(=O)N1CCC[C@@H](C(N)=O)C1 APFUDGDIIFSTSD-MRVPVSSYSA-N 0.000 claims description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 8
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 claims description 8
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- YCXCRFGBFZTUSU-SNVBAGLBSA-N 1-o-tert-butyl 3-o-ethyl (3r)-piperidine-1,3-dicarboxylate Chemical compound CCOC(=O)[C@@H]1CCCN(C(=O)OC(C)(C)C)C1 YCXCRFGBFZTUSU-SNVBAGLBSA-N 0.000 claims description 6
- ZHNUHDYFZUAESO-UHFFFAOYSA-N Formamide Chemical compound NC=O ZHNUHDYFZUAESO-UHFFFAOYSA-N 0.000 claims description 6
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 6
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 6
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 5
- 229960002510 mandelic acid Drugs 0.000 claims description 5
- -1 3-ethyl piperidine formate Chemical compound 0.000 claims description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- 239000012065 filter cake Substances 0.000 claims description 4
- 239000003208 petroleum Substances 0.000 claims description 4
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 4
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 4
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims description 3
- WBJINCZRORDGAQ-UHFFFAOYSA-N formic acid ethyl ester Natural products CCOC=O WBJINCZRORDGAQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000012295 chemical reaction liquid Substances 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000009776 industrial production Methods 0.000 abstract description 2
- CUYKNJBYIJFRCU-UHFFFAOYSA-N 3-aminopyridine Chemical compound NC1=CC=CN=C1 CUYKNJBYIJFRCU-UHFFFAOYSA-N 0.000 description 2
- GRFNBEZIAWKNCO-UHFFFAOYSA-N 3-pyridinol Chemical compound OC1=CC=CN=C1 GRFNBEZIAWKNCO-UHFFFAOYSA-N 0.000 description 2
- 102000016622 Dipeptidyl Peptidase 4 Human genes 0.000 description 2
- 101000930822 Giardia intestinalis Dipeptidyl-peptidase 4 Proteins 0.000 description 2
- 229960000447 alogliptin benzoate Drugs 0.000 description 2
- KEJICOXJTRHYAK-XFULWGLBSA-N alogliptin benzoate Chemical compound OC(=O)C1=CC=CC=C1.C=1C=CC=C(C#N)C=1CN1C(=O)N(C)C(=O)C=C1N1CCC[C@@H](N)C1 KEJICOXJTRHYAK-XFULWGLBSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- XIWBSOUNZWSFKU-UHFFFAOYSA-N ethyl piperidine-3-carboxylate Chemical compound CCOC(=O)C1CCCNC1 XIWBSOUNZWSFKU-UHFFFAOYSA-N 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- NOESYZHRGYRDHS-UHFFFAOYSA-N insulin Chemical compound N1C(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(NC(=O)CN)C(C)CC)CSSCC(C(NC(CO)C(=O)NC(CC(C)C)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CCC(N)=O)C(=O)NC(CC(C)C)C(=O)NC(CCC(O)=O)C(=O)NC(CC(N)=O)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CSSCC(NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2C=CC(O)=CC=2)NC(=O)C(CC(C)C)NC(=O)C(C)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2NC=NC=2)NC(=O)C(CO)NC(=O)CNC2=O)C(=O)NCC(=O)NC(CCC(O)=O)C(=O)NC(CCCNC(N)=N)C(=O)NCC(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC(O)=CC=3)C(=O)NC(C(C)O)C(=O)N3C(CCC3)C(=O)NC(CCCCN)C(=O)NC(C)C(O)=O)C(=O)NC(CC(N)=O)C(O)=O)=O)NC(=O)C(C(C)CC)NC(=O)C(CO)NC(=O)C(C(C)O)NC(=O)C1CSSCC2NC(=O)C(CC(C)C)NC(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CC(N)=O)NC(=O)C(NC(=O)C(N)CC=1C=CC=CC=1)C(C)C)CC1=CN=CN1 NOESYZHRGYRDHS-UHFFFAOYSA-N 0.000 description 2
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- 108010004460 Gastric Inhibitory Polypeptide Proteins 0.000 description 1
- DTHNMHAUYICORS-KTKZVXAJSA-N Glucagon-like peptide 1 Chemical compound C([C@@H](C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](C)C(=O)N[C@@H](CC=1C2=CC=CC=C2NC=1)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CCCCN)C(=O)NCC(=O)N[C@@H](CCCNC(N)=N)C(N)=O)NC(=O)[C@H](CCC(O)=O)NC(=O)[C@H](CCCCN)NC(=O)[C@H](C)NC(=O)[C@H](C)NC(=O)[C@H](CCC(N)=O)NC(=O)CNC(=O)[C@H](CCC(O)=O)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CC=1C=CC(O)=CC=1)NC(=O)[C@H](CO)NC(=O)[C@H](CO)NC(=O)[C@@H](NC(=O)[C@H](CC(O)=O)NC(=O)[C@H](CO)NC(=O)[C@@H](NC(=O)[C@H](CC=1C=CC=CC=1)NC(=O)[C@@H](NC(=O)CNC(=O)[C@H](CCC(O)=O)NC(=O)[C@H](C)NC(=O)[C@@H](N)CC=1N=CNC=1)[C@@H](C)O)[C@@H](C)O)C(C)C)C1=CC=CC=C1 DTHNMHAUYICORS-KTKZVXAJSA-N 0.000 description 1
- 102100023915 Insulin Human genes 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D211/00—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
- C07D211/04—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D211/06—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members
- C07D211/36—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members 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
- C07D211/56—Nitrogen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B57/00—Separation of optically-active compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D211/00—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings
- C07D211/04—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D211/06—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members
- C07D211/36—Heterocyclic compounds containing hydrogenated pyridine rings, not condensed with other rings with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having no double bonds between ring members or between ring members and non-ring members 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
- C07D211/60—Carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B2200/00—Indexing scheme relating to specific properties of organic compounds
- C07B2200/07—Optical isomers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/55—Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Hydrogenated Pyridines (AREA)
Abstract
本发明公开了一种(R)‑1‑Boc‑3‑氨基哌啶的制备方法;包括以下步骤:S1、以3‑哌啶甲酸乙酯为原料,用R‑扁桃酸手性拆分得到化合物Ⅰ;S2、化合物Ⅰ与Boc酸酐进行缩合反应,得到化合物Ⅱ;S3、化合物Ⅱ和氨水进行胺酯交换,得到化合物Ⅲ;S4、化合物Ⅲ经霍夫曼降解反应得到化合物(R)‑1‑Boc‑3‑氨基哌啶;本发明方法反应条件温和,安全可靠,工艺稳定性良好,能耗低,收率高,绿色环保,适合于工业化生产。
Description
技术领域
本发明涉及到药物化学合成领域,具体涉及一种(R)-1-Boc-3-氨基哌啶的制备方法。
背景技术
(R)-1-Boc-3-氨基哌啶是苯甲酸阿格列汀和曲格列汀的重要中间体。苯甲酸阿格列汀和曲格列汀是日本武田公司研发的一种选择性的丝氨酸蛋白酶二肽基肽酶IV(DPP-IV)抑制剂,能维持体内肠促胰岛素肽GLP-1和葡萄糖依赖促胰岛素肽GIP的水平,促进胰岛素的分泌,发挥降糖疗效,用于2型糖尿病患者的血糖控制,为口服治疗2型糖尿病药物。
现有制备技术存在以下几个问题:反应原料贵,反应路线较长,总体收率低,工艺操作比较苛刻,后处理操作工序比较繁琐,而且难以纯化。
1.Brian R.de Costa等报道的以3-羟基吡啶为主要原料,反应过程中用到叠氮化合物,易于爆炸,难实现工业化
2.Herterocles,36,10,2383-96;1993报道的以3-氨基吡啶为原料,该合成反应中还原需要的压力高,氢化不完全,副产物多,后处理困难,不易于工业化。
发明内容
本发明的目的在于提供一种(R)-1-Boc-3-氨基哌啶的制备方法,以解决上述背景技术中提出的问题。
为实现上述目的,本发明提供如下技术方案:一种(R)-1-Boc-3-氨基哌啶的制备方法,包括以下步骤:
S1、以3-哌啶甲酸乙酯为原料,用R-扁桃酸手性拆分得到化合物Ⅰ;
S2、化合物Ⅰ与Boc酸酐进行缩合反应,得到化合物Ⅱ;
S3、化合物Ⅱ和氨水进行胺酯交换,得到化合物Ⅲ;
S4、化合物Ⅲ经霍夫曼降解反应得到化合物(R)-1-Boc-3-氨基哌啶;
较佳的,所述S1中:将20mmol、1eq的3-哌啶甲酸乙酯溶于20ml乙酸乙酯中,搅拌加热至40~50℃,在该温度下缓慢滴加20ml含20mmol、1eq R-扁桃酸的乙酸乙酯,滴毕,保温搅拌20~30min,缓慢冷却至10~15℃,抽滤、干燥得羧酸盐;然后将羧酸盐加入10ml乙醇中,加热至50~65℃,保温15~20min,缓慢降至10~15℃,抽滤,干燥得羧酸盐Ⅰ,重复此操作直至ee值大于99%,得白色固体(R)-3-哌啶甲酸乙酯羧酸盐5.1g;
所述S2中:在冰盐浴下将11mmol、1.1eqBoc酸酐加滴到含10mmol、1eq的羧酸盐Ⅰ和含13mmol、1.3eq的30ml三乙胺的二氯甲烷溶液中,滴加完毕反应液升至室温,反应12h,反应结束,反应液过滤,滤饼加用二氯甲烷洗涤,合并有机相,有机相用20ml稀的碳酸氢钠溶液,20ml、0.5M的稀盐酸和30ml饱和食盐水依次洗涤一次,然后有机相用无水硫酸钠干燥2h,过滤,旋干溶剂,得淡黄色油状物粗品,粗品用石油醚重结晶得产率为92%的淡黄色固体(R)-1-Boc-3-哌啶甲酸乙酯2.4g;
所述S3中:将含10mmol、1.1eq的(R)-1-Boc-3-哌啶甲酸乙酯的30ml四氢呋喃溶液室温搅拌下加入20ml、质量分数20%的氨水,加料完毕,反应液加热至50-60℃,反应6h,原料反应完全,旋干溶剂,得黄色固体(R)-1-Boc-3-哌啶甲酰胺2.3g;
所述S4中:将10mmol、1eq的(R)-1-Boc-3-哌啶甲酰胺加到10ml、质量分数40%的氢氧化钠水溶液中,在0-5℃下向反应液中滴加8ml、质量分数5%的次氯酸钠水溶液,滴加完毕,反应液升温至40~45℃,保温搅拌,直至原料转化完毕,冷却至室温,反应液用20ml乙酸乙酯萃取两次,合并有机相,然后有机相用无水硫酸钠干燥2h,过滤,减压旋干溶剂,得淡黄色油状物粗品;粗品用甲基叔丁基醚重结晶,得淡黄色固体(R)-1-Boc-3-氨基哌啶1.6g。
较佳的,所述S1中,将20mmol、1eq的3-哌啶甲酸乙酯溶于20ml乙酸乙酯中,搅拌加热至43~44℃,在该温度下缓慢滴加20ml含20mmol、1eqR-扁桃酸的乙酸乙酯,滴毕,保温搅拌20~30min,缓慢冷却至12~13℃,抽滤、干燥得羧酸盐;然后将羧酸盐加入10ml乙醇中,加热至55~60℃,保温15~20min,缓慢降至13~15℃,抽滤,干燥得羧酸盐Ⅰ,重复此操作直至ee值大于99%,得产率82%的白色固体(R)-3-哌啶甲酸乙酯羧酸盐5.1g。
较佳的,所述S3中,将含10mmol、1.1eq的(R)-1-Boc-3-哌啶甲酸乙酯的30ml四氢呋喃溶液室温搅拌下加入20ml、质量分数20%的氨水,加料完毕,反应液加热至54-57℃,反应6h,原料反应完全,旋干溶剂,得产率为100%的黄色固体(R)-1-Boc-3-哌啶甲酰胺2.3g。
较佳的,所述S4中,将10mmol、1eq的(R)-1-Boc-3-哌啶甲酰胺加到10ml、质量分数40%的氢氧化钠水溶液中,在3-5℃下向反应液中滴加8ml、质量分数5%的次氯酸钠水溶液,滴加完毕,反应液升温至42~45℃,保温搅拌,直至原料转化完毕,冷却至室温,反应液用20ml乙酸乙酯萃取两次,合并有机相,然后有机相用无水硫酸钠干燥2h,过滤,减压旋干溶剂,得淡黄色油状物粗品;粗品用甲基叔丁基醚重结晶,得产率为80%的淡黄色固体(R)-1-Boc-3-氨基哌啶1.6g。
与现有技术相比,本发明的有益效果是:
本发明方法反应条件温和,安全可靠,工艺稳定性良好,能耗低,收率高,绿色环保,适合于工业化生产;克服了反应过程中用到叠氮化合物、易于爆炸、难实现工业化的缺陷,并克服了反应过程需要的压力高、氢化不完全、副产物多、后处理困难等缺陷。
具体实施方式
下面将对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例1
一种(R)-1-Boc-3-氨基哌啶的制备方法,包括以下步骤:
S1、以3-哌啶甲酸乙酯为原料,用R-扁桃酸手性拆分得到化合物Ⅰ;
S2、化合物Ⅰ与Boc酸酐进行缩合反应,得到化合物Ⅱ;
S3、化合物Ⅱ和氨水进行胺酯交换,得到化合物Ⅲ;
S4、化合物Ⅲ经霍夫曼降解反应得到化合物(R)-1-Boc-3-氨基哌啶;
其中,所述S1中:将20mmol、1eq的3-哌啶甲酸乙酯溶于20ml乙酸乙酯中,搅拌加热至40℃,在该温度下缓慢滴加20ml含20mmol、1eqR-扁桃酸的乙酸乙酯,滴毕,保温搅拌20min,缓慢冷却至10℃,抽滤、干燥得羧酸盐;然后将羧酸盐加入10ml乙醇中,加热至50℃,保温15~20min,缓慢降至10℃,抽滤,干燥得羧酸盐Ⅰ,重复此操作直至ee值大于99%,得产率为82%白色固体(R)-3-哌啶甲酸乙酯羧酸盐5.1g;
其中S2中:在冰盐浴下将11mmol、1.1eqBoc酸酐加滴到含10mmol、1eq的羧酸盐Ⅰ和含13mmol、1.3eq的30ml三乙胺的二氯甲烷溶液中,滴加完毕反应液升至室温,反应12h,反应结束,反应液过滤,滤饼加用二氯甲烷洗涤,合并有机相,有机相用20ml稀的碳酸氢钠溶液,20ml、0.5M的稀盐酸和30ml饱和食盐水依次洗涤一次,然后有机相用无水硫酸钠干燥2h,过滤,旋干溶剂,得淡黄色油状物粗品,粗品用石油醚重结晶得产率为92%的淡黄色固体(R)-1-Boc-3-哌啶甲酸乙酯2.4g;
其中所述S3中:将含10mmol、1.1eq的(R)-1-Boc-3-哌啶甲酸乙酯的30ml四氢呋喃溶液室温搅拌下加入20ml、质量分数20%的氨水,加料完毕,反应液加热至50-60℃,反应6h,原料反应完全,旋干溶剂,得产率为100%的黄色固体(R)-1-Boc-3-哌啶甲酰胺2.3g;
其中所述S4中:将10mmol、1eq的(R)-1-Boc-3-哌啶甲酰胺加到10ml、质量分数40%的氢氧化钠水溶液中,在2℃下向反应液中滴加8ml、质量分数5%的次氯酸钠水溶液,滴加完毕,反应液升温至40℃,保温搅拌,直至原料转化完毕,冷却至室温,反应液用20ml乙酸乙酯萃取两次,合并有机相,然后有机相用无水硫酸钠干燥2h,过滤,减压旋干溶剂,得淡黄色油状物粗品;粗品用甲基叔丁基醚重结晶,得产率为80%的淡黄色固体(R)-1-Boc-3-氨基哌啶1.6g。
实施例2
一种(R)-1-Boc-3-氨基哌啶的制备方法,包括以下步骤:
S1、以3-哌啶甲酸乙酯为原料,用R-扁桃酸手性拆分得到化合物Ⅰ;
S2、化合物Ⅰ与Boc酸酐进行缩合反应,得到化合物Ⅱ;
S3、化合物Ⅱ和氨水进行胺酯交换,得到化合物Ⅲ;
S4、化合物Ⅲ经霍夫曼降解反应得到化合物(R)-1-Boc-3-氨基哌啶;
其中,所述S1中:将20mmol、1eq的3-哌啶甲酸乙酯溶于20ml乙酸乙酯中,搅拌加热至50℃,在该温度下缓慢滴加20ml含20mmol、1eqR-扁桃酸的乙酸乙酯,滴毕,保温搅拌30min,缓慢冷却至15℃,抽滤、干燥得羧酸盐;然后将羧酸盐加入10ml乙醇中,加热至65℃,保温20min,缓慢降至15℃,抽滤,干燥得羧酸盐Ⅰ,重复此操作直至ee值大于99%,得产率为82%白色固体(R)-3-哌啶甲酸乙酯羧酸盐5.1g;
其中S2中:在冰盐浴下将11mmol、1.1eqBoc酸酐加滴到含10mmol、1eq的羧酸盐Ⅰ和含13mmol、1.3eq的30ml三乙胺的二氯甲烷溶液中,滴加完毕反应液升至室温,反应12h,反应结束,反应液过滤,滤饼加用二氯甲烷洗涤,合并有机相,有机相用20ml稀的碳酸氢钠溶液,20ml、0.5M的稀盐酸和30ml饱和食盐水依次洗涤一次,然后有机相用无水硫酸钠干燥2h,过滤,旋干溶剂,得淡黄色油状物粗品,粗品用石油醚重结晶得产率为92%的淡黄色固体(R)-1-Boc-3-哌啶甲酸乙酯2.4g;
其中所述S3中:将含10mmol、1.1eq的(R)-1-Boc-3-哌啶甲酸乙酯的30ml四氢呋喃溶液室温搅拌下加入20ml、质量分数20%的氨水,加料完毕,反应液加热至50-60℃,反应6h,原料反应完全,旋干溶剂,得产率为100%的黄色固体(R)-1-Boc-3-哌啶甲酰胺2.3g;
其中所述S4中:将10mmol、1eq的(R)-1-Boc-3-哌啶甲酰胺加到10ml、质量分数40%的氢氧化钠水溶液中,在0-5℃下向反应液中滴加8ml、质量分数5%的次氯酸钠水溶液,滴加完毕,反应液升温至45℃,保温搅拌,直至原料转化完毕,冷却至室温,反应液用20ml乙酸乙酯萃取两次,合并有机相,然后有机相用无水硫酸钠干燥2h,过滤,减压旋干溶剂,得淡黄色油状物粗品;粗品用甲基叔丁基醚重结晶,得产率为80%的淡黄色固体(R)-1-Boc-3-氨基哌啶1.6g。
尽管已经示出和描述了本发明的实施例,对于本领域的普通技术人员而言,可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由所附权利要求及其等同物限定。
Claims (5)
2.根据权利要求1所述的一种(R)-1-Boc-3-氨基哌啶的制备方法,其特征在于:
所述S1中:将20mmol、1eq的3-哌啶甲酸乙酯溶于20ml乙酸乙酯中,搅拌加热至40~50℃,在该温度下缓慢滴加20ml含20mmol、1eqR-扁桃酸的乙酸乙酯,滴毕,保温搅拌20~30min,缓慢冷却至10~15℃,抽滤、干燥得羧酸盐;然后将羧酸盐加入10ml乙醇中,加热至50~65℃,保温15~20min,缓慢降至10~15℃,抽滤,干燥得羧酸盐Ⅰ,重复此操作直至ee值大于99%,得白色固体(R)-3-哌啶甲酸乙酯羧酸盐5.1g;
所述S2中:在冰盐浴下将11mmol、1.1eqBoc酸酐加滴到含10mmol、1eq的羧酸盐Ⅰ和含13mmol、1.3eq的30ml三乙胺的二氯甲烷溶液中,滴加完毕反应液升至室温,反应12h,反应结束,反应液过滤,滤饼用二氯甲烷洗涤,合并有机相,有机相用稀的20ml碳酸氢钠溶液,20ml、0.5M的稀盐酸和30ml饱和食盐水依次洗涤一次,然后有机相用无水硫酸钠干燥2h,过滤,旋干溶剂,得淡黄色油状物粗品,粗品用石油醚重结晶得产率为92%的淡黄色固体(R)-1-Boc-3-哌啶甲酸乙酯2.4g;
所述S3中:将含10mmol、1.1eq的(R)-1-Boc-3-哌啶甲酸乙酯的30ml四氢呋喃溶液室温搅拌下加入20ml、质量分数20%的氨水,加料完毕,反应液加热至50-60℃,反应6h,原料反应完全,旋干溶剂,得黄色固体(R)-1-Boc-3-哌啶甲酰胺2.3g;
所述S4中:将10mmol、1eq的(R)-1-Boc-3-哌啶甲酰胺加到10ml、质量分数40%的氢氧化钠水溶液中,在0-5℃下向反应液中滴加8ml、质量分数5%的次氯酸钠水溶液,滴加完毕,反应液升温至40~45℃,保温搅拌,直至原料转化完毕,冷却至室温,反应液用20ml乙酸乙酯萃取两次,合并有机相,然后有机相用无水硫酸钠干燥2h,过滤,减压旋干溶剂,得淡黄色油状物粗品;粗品用甲基叔丁基醚重结晶,得淡黄色固体(R)-1-Boc-3-氨基哌啶1.6g。
3.根据权利要求2所述的一种(R)-1-Boc-3-氨基哌啶的制备方法,其特征在于:所述S1中,将20mmol、1eq的3-哌啶甲酸乙酯溶于20ml乙酸乙酯中,搅拌加热至43~44℃,在该温度下缓慢滴加20ml含20mmol、1eqR-扁桃酸的乙酸乙酯,滴毕,保温搅拌20~30min,缓慢冷却至12~13℃,抽滤、干燥得羧酸盐;然后将羧酸盐加入10ml乙醇中,加热至55~60℃,保温15~20min,缓慢降至13~15℃,抽滤,干燥得羧酸盐Ⅰ,重复此操作直至ee值大于99%,得产率82%的白色固体(R)-3-哌啶甲酸乙酯羧酸盐5.1g。
4.根据权利要求2所述的一种(R)-1-Boc-3-氨基哌啶的制备方法,其特征在于:所述S3中,将含10mmol、1.1eq的(R)-1-Boc-3-哌啶甲酸乙酯的30ml四氢呋喃溶液室温搅拌下加入20ml、质量分数20%的氨水,加料完毕,反应液加热至54-57℃,反应6h,原料反应完全,旋干溶剂,得产率为100%的黄色固体(R)-1-Boc-3-哌啶甲酰胺2.3g。
5.根据权利要求2所述的一种(R)-1-Boc-3-氨基哌啶的制备方法,其特征在于:所述S4中,将10mmol、1eq的(R)-1-Boc-3-哌啶甲酰胺加到10ml、质量分数40%的氢氧化钠水溶液中,在3-5℃下向反应液中滴加8ml、质量分数5%的次氯酸钠水溶液,滴加完毕,反应液升温至42~45℃,保温搅拌,直至原料转化完毕,冷却至室温,反应液用20ml乙酸乙酯萃取两次,合并有机相,然后有机相用无水硫酸钠干燥2h,过滤,减压旋干溶剂,得淡黄色油状物粗品;粗品用甲基叔丁基醚重结晶,得产率为80%的淡黄色固体(R)-1-Boc-3-氨基哌啶1.6g。
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