JPS5929187B2 - Ｎ−ベンジルオキシカルボニルアスパラギン酸の調製法 - Google Patents
Ｎ−ベンジルオキシカルボニルアスパラギン酸の調製法Info
- Publication number
- JPS5929187B2 JPS5929187B2 JP56085522A JP8552281A JPS5929187B2 JP S5929187 B2 JPS5929187 B2 JP S5929187B2 JP 56085522 A JP56085522 A JP 56085522A JP 8552281 A JP8552281 A JP 8552281A JP S5929187 B2 JPS5929187 B2 JP S5929187B2
- Authority
- JP
- Japan
- Prior art keywords
- aspartic acid
- benzyl chloroformate
- benzyloxycarbonyl
- aqueous solution
- reaction mixture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- XYXYXSKSTZAEJW-VIFPVBQESA-N (2s)-2-(phenylmethoxycarbonylamino)butanedioic acid Chemical compound OC(=O)C[C@@H](C(O)=O)NC(=O)OCC1=CC=CC=C1 XYXYXSKSTZAEJW-VIFPVBQESA-N 0.000 title claims description 41
- 238000002360 preparation method Methods 0.000 title claims 2
- HSDAJNMJOMSNEV-UHFFFAOYSA-N benzyl chloroformate Chemical compound ClC(=O)OCC1=CC=CC=C1 HSDAJNMJOMSNEV-UHFFFAOYSA-N 0.000 claims description 41
- 239000011541 reaction mixture Substances 0.000 claims description 34
- CKLJMWTZIZZHCS-REOHCLBHSA-N L-aspartic acid Chemical compound OC(=O)[C@@H](N)CC(O)=O CKLJMWTZIZZHCS-REOHCLBHSA-N 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 28
- 238000006243 chemical reaction Methods 0.000 claims description 26
- 229960005261 aspartic acid Drugs 0.000 claims description 23
- 239000007864 aqueous solution Substances 0.000 claims description 20
- 235000003704 aspartic acid Nutrition 0.000 claims description 20
- OQFSQFPPLPISGP-UHFFFAOYSA-N beta-carboxyaspartic acid Natural products OC(=O)C(N)C(C(O)=O)C(O)=O OQFSQFPPLPISGP-UHFFFAOYSA-N 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 229910001868 water Inorganic materials 0.000 claims description 17
- -1 alkali metal salt Chemical class 0.000 claims description 16
- 229910052783 alkali metal Inorganic materials 0.000 claims description 15
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical group Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 13
- 239000002253 acid Substances 0.000 claims description 9
- 229940009098 aspartate Drugs 0.000 claims description 8
- YIELQSHMEZQETN-QWRGUYRKSA-N (2s)-2-[[(2s)-3-carboxy-2-(phenylmethoxycarbonylamino)propanoyl]amino]butanedioic acid Chemical compound OC(=O)C[C@@H](C(O)=O)NC(=O)[C@H](CC(O)=O)NC(=O)OCC1=CC=CC=C1 YIELQSHMEZQETN-QWRGUYRKSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- CKLJMWTZIZZHCS-UHFFFAOYSA-N D-OH-Asp Natural products OC(=O)C(N)CC(O)=O CKLJMWTZIZZHCS-UHFFFAOYSA-N 0.000 claims description 3
- CKLJMWTZIZZHCS-UWTATZPHSA-N L-Aspartic acid Natural products OC(=O)[C@H](N)CC(O)=O CKLJMWTZIZZHCS-UWTATZPHSA-N 0.000 claims description 3
- 125000000217 alkyl group Chemical class 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims 2
- UYWQUFXKFGHYNT-UHFFFAOYSA-N phenylmethyl ester of formic acid Natural products O=COCC1=CC=CC=C1 UYWQUFXKFGHYNT-UHFFFAOYSA-N 0.000 claims 1
- 239000000047 product Substances 0.000 description 29
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 24
- 239000012535 impurity Substances 0.000 description 14
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 12
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 12
- 239000000243 solution Substances 0.000 description 12
- 239000003153 chemical reaction reagent Substances 0.000 description 11
- 238000007792 addition Methods 0.000 description 10
- 239000000376 reactant Substances 0.000 description 9
- 238000004809 thin layer chromatography Methods 0.000 description 7
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 6
- 150000001509 aspartic acid derivatives Chemical class 0.000 description 5
- 108010016626 Dipeptides Proteins 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 235000019445 benzyl alcohol Nutrition 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000003765 sweetening agent Substances 0.000 description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 235000003599 food sweetener Nutrition 0.000 description 3
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 3
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Inorganic materials [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- YZQCXOFQZKCETR-UWVGGRQHSA-N Asp-Phe Chemical compound OC(=O)C[C@H](N)C(=O)N[C@H](C(O)=O)CC1=CC=CC=C1 YZQCXOFQZKCETR-UWVGGRQHSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 125000005907 alkyl ester group Chemical group 0.000 description 2
- IAOZJIPTCAWIRG-QWRGUYRKSA-N aspartame Chemical compound OC(=O)C[C@H](N)C(=O)N[C@H](C(=O)OC)CC1=CC=CC=C1 IAOZJIPTCAWIRG-QWRGUYRKSA-N 0.000 description 2
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 125000004185 ester group Chemical group 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 238000012886 linear function Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 235000017550 sodium carbonate Nutrition 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 108010011485 Aspartame Proteins 0.000 description 1
- QXNVGIXVLWOKEQ-UHFFFAOYSA-N Disodium Chemical class [Na][Na] QXNVGIXVLWOKEQ-UHFFFAOYSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 239000000605 aspartame Substances 0.000 description 1
- 229960003438 aspartame Drugs 0.000 description 1
- 235000010357 aspartame Nutrition 0.000 description 1
- 125000001584 benzyloxycarbonyl group Chemical group C(=O)(OCC1=CC=CC=C1)* 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- FZFAMSAMCHXGEF-UHFFFAOYSA-N chloro formate Chemical compound ClOC=O FZFAMSAMCHXGEF-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000007327 hydrogenolysis reaction Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004811 liquid chromatography Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VSDUZFOSJDMAFZ-VIFPVBQESA-N methyl L-phenylalaninate Chemical compound COC(=O)[C@@H](N)CC1=CC=CC=C1 VSDUZFOSJDMAFZ-VIFPVBQESA-N 0.000 description 1
- 150000004702 methyl esters Chemical class 0.000 description 1
- 125000002496 methyl group Chemical class [H]C([H])([H])* 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 125000000636 p-nitrophenyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1*)[N+]([O-])=O 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000010647 peptide synthesis reaction Methods 0.000 description 1
- 229960005190 phenylalanine Drugs 0.000 description 1
- COLNVLDHVKWLRT-UHFFFAOYSA-N phenylalanine Natural products OC(=O)C(N)CC1=CC=CC=C1 COLNVLDHVKWLRT-UHFFFAOYSA-N 0.000 description 1
- 239000011736 potassium bicarbonate Substances 0.000 description 1
- 235000015497 potassium bicarbonate Nutrition 0.000 description 1
- 229910000028 potassium bicarbonate Inorganic materials 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 235000011181 potassium carbonates Nutrition 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 239000012429 reaction media Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- WTWSHHITWMVLBX-DKWTVANSSA-M sodium;(2s)-2-aminobutanedioate;hydron Chemical compound [Na+].[O-]C(=O)[C@@H](N)CC(O)=O WTWSHHITWMVLBX-DKWTVANSSA-M 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 235000021092 sugar substitutes Nutrition 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C269/00—Preparation of derivatives of carbamic acid, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
- C07C269/04—Preparation of derivatives of carbamic acid, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups from amines with formation of carbamate groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Peptides Or Proteins (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/161,175 US4293706A (en) | 1980-06-19 | 1980-06-19 | Preparation of N-benzyloxycarbonyl aspartic acid |
| US161175 | 1980-06-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5714570A JPS5714570A (en) | 1982-01-25 |
| JPS5929187B2 true JPS5929187B2 (ja) | 1984-07-18 |
Family
ID=22580141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56085522A Expired JPS5929187B2 (ja) | 1980-06-19 | 1981-06-03 | Ｎ−ベンジルオキシカルボニルアスパラギン酸の調製法 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4293706A (enExample) |
| JP (1) | JPS5929187B2 (enExample) |
| CA (1) | CA1154457A (enExample) |
| DE (1) | DE3123668C2 (enExample) |
| FR (1) | FR2485005A1 (enExample) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56110661A (en) * | 1980-02-04 | 1981-09-01 | Ajinomoto Co Inc | Preparation of n-benzyloxycarbonyl-l-aspartic acid |
| US4450284A (en) * | 1981-08-10 | 1984-05-22 | Ppg Industries, Inc. | Method for purifying N-benzyloxycarbonyl aspartic acid |
| JPS6020389A (ja) * | 1983-07-14 | 1985-02-01 | Nec Corp | 半導体メモリ |
| US4518792A (en) * | 1983-08-26 | 1985-05-21 | Hatco Chemical Corporation | Process for preparing N-benzyloxycarbonyl-L-aspartic acid |
| US4570015A (en) * | 1983-08-26 | 1986-02-11 | Hatco Chemical Corporation | Preparation of large crystals of N-benzyloxycarbonyl-L-aspartic acid |
| US4523026A (en) * | 1983-08-26 | 1985-06-11 | Hatco Chemical Corporation | Synthesis of N-benzyloxycarbonyl-L-aspartic acid |
| JPS6076146A (ja) * | 1983-10-03 | 1985-04-30 | Nitto Electric Ind Co Ltd | 薄型半導体装置 |
| US4484001A (en) * | 1983-11-18 | 1984-11-20 | Ppg Industries, Inc. | Method for preparing N-benzyloxycarbonyl amino acids containing additional functionality |
| US4500726A (en) * | 1984-05-23 | 1985-02-19 | Ppg Industries, Inc. | Method for preparing N-benzyloxycarbonyl amino acids containing additional functionality |
| EP0832982B1 (de) * | 1996-09-20 | 2002-05-15 | DSM Fine Chemicals Austria Nfg GmbH & Co KG | Verfahren zur Herstellung von Z-L-Asparaginsäure-Dinatriumsalz aus Fumarsäure |
| CN1323068C (zh) * | 2005-02-06 | 2007-06-27 | 扬州宝盛生物化工有限公司 | N－苄氧羰基－l－缬氨酸的合成方法 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3259617A (en) * | 1963-05-24 | 1966-07-05 | Squibb & Sons Inc | Process for purification of peptides |
| US3492131A (en) * | 1966-04-18 | 1970-01-27 | Searle & Co | Peptide sweetening agents |
| DE1543630A1 (de) * | 1966-12-23 | 1969-07-31 | Bayer Ag | Verfahren zur Herstellung von tert. Butyloxycarbonylderivaten von Aminosaeuren |
| US3800046A (en) * | 1967-04-17 | 1974-03-26 | Searle & Co | Artificially sweetened consumable products |
| GB1258248A (enExample) * | 1968-07-17 | 1971-12-22 | ||
| US3642491A (en) * | 1970-01-12 | 1972-02-15 | Searle & Co | Artificially sweetened consumable products |
| CH553751A (de) * | 1970-05-19 | 1974-09-13 | Stamicarbon | Verfahren zur herstellung von aspartylaminosaeure-estern. |
| BE791604A (fr) * | 1971-11-19 | 1973-05-17 | Lilly Co Eli | Polypeptides et procedes de preparation de ceux-ci |
| DE2857828C2 (enExample) * | 1977-01-27 | 1990-06-07 | Toyo Soda Mfg. Co., Ltd., Shinnanyo, Yamaguchi, Jp | |
| JPS53135903A (en) * | 1977-04-28 | 1978-11-28 | Toyo Soda Mfg Co Ltd | Separation of peptides |
-
1980
- 1980-06-19 US US06/161,175 patent/US4293706A/en not_active Expired - Lifetime
-
1981
- 1981-05-19 CA CA000377850A patent/CA1154457A/en not_active Expired
- 1981-06-03 JP JP56085522A patent/JPS5929187B2/ja not_active Expired
- 1981-06-15 DE DE3123668A patent/DE3123668C2/de not_active Expired
- 1981-06-18 FR FR8112036A patent/FR2485005A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5714570A (en) | 1982-01-25 |
| DE3123668C2 (de) | 1984-01-12 |
| CA1154457A (en) | 1983-09-27 |
| DE3123668A1 (de) | 1982-03-18 |
| US4293706A (en) | 1981-10-06 |
| FR2485005B1 (enExample) | 1984-08-17 |
| FR2485005A1 (fr) | 1981-12-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR900008012B1 (ko) | α-L-아스파르틸-L-페닐알라닌 메틸 에스테르 및 그의 염산염의 제조방법 | |
| JPS5929187B2 (ja) | Ｎ−ベンジルオキシカルボニルアスパラギン酸の調製法 | |
| SU884564A3 (ru) | Способ получени метилового эфира @ -L-аспартил-L-фенилаланина | |
| KR920002337B1 (ko) | α-L-아스파르틸-L-페닐알라닌 메틸 에스테르 및 이의 염산염의 제조방법 | |
| CA1155453A (en) | Method of producing n-benzyloxycarbonyl-l-aspartic acid | |
| US4677220A (en) | Process for the preparation of α-L-aspartyl-L-phenylalanine methyl ester | |
| US4450284A (en) | Method for purifying N-benzyloxycarbonyl aspartic acid | |
| EP0072015B1 (en) | Method for purifying n-benzyloxycarbonyl aspartic acid | |
| KR930008088B1 (ko) | N-보호된-L-α-아스파틸-L-페닐알라닌의 제조방법 | |
| IE57662B1 (en) | Aspartame isolation | |
| US4523026A (en) | Synthesis of N-benzyloxycarbonyl-L-aspartic acid | |
| KR920003333B1 (ko) | α-L-아스파르틸-L-페닐알라닌 β-저급 알킬 에스테르의 제조방법 | |
| JPS6145988B2 (enExample) | ||
| CA1298682C (en) | PREPARATION PROCESS OF .alpha.-L-ASPARTYL-L-PHENYL-ALANINE METHYL ESTER OR HYDROHALIDE THEREOF | |
| US4549028A (en) | Process for the preparation of hydantoin precursor of phenylalanine | |
| US4518792A (en) | Process for preparing N-benzyloxycarbonyl-L-aspartic acid | |
| KR920000269B1 (ko) | N-벤조일-l-아스파스탄의 정제방법 | |
| JPH01100161A (ja) | ジケトピペラジン誘導体の製造方法 | |
| JPH07640B2 (ja) | α−Ｌ−アスパルチル−Ｌ−フエニルアラニンメチルエステル塩酸塩の製造法 | |
| JPH0696595B2 (ja) | Ｎ−保護−Ｌ−α−アスパルチル−Ｌ−フエニルアラニンの製法 | |
| JPH07116226B2 (ja) | α−Ｌ−アスパルチル−Ｌ−フエニルアラニンメチルエステルまたはそのハロゲン化水素酸塩の製法 | |
| JPH07101981A (ja) | α−Ｌ−アスパルチル−Ｌ−フェニルアラニンメチルエステルの製造法 | |
| JPH0770177A (ja) | Ｎ−保護−Ｌ−α−アスパルチル−Ｌ−フェニルアラニンの製法 |