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Dayang Chem (Hangzhou) Co.,Ltd.

Dayangchem's R&D center can offer custom synthesis according to the contract research and development services for the fine chemicals, pharmaceutical, biotechnique and some of the other chemicals. DayangChem can provide different quantities

N-CARBOBENZYLOXY-L-ASPARTIC ANHYDRIDE

Cas:4515-23-5

Min.Order:1 Kilogram

FOB Price: $3.0

Type:Lab/Research institutions

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Zhuozhou Wenxi import and Export Co., Ltd

WITH US,YOUR MONEY IN SAFE,YOUR BUSINESS IN SAFE 1)Quick Response Within 12 hours; 2)Quality Guarantee: All products are strictly tested by our QC, confirmed by QA and approved by third party lab in China, USA, Canada, Germany, UK, Italy, France et

Manufacturer supply CAS 4515-23-5 with best quality

Cas:4515-23-5

Min.Order:1 Kilogram

FOB Price: $139.0 / 210.0

Type:Trading Company

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Shanghai Upbio Tech Co.,Ltd

1.In No Less 10 years exporting experience. you can 100% received goods 2.Lower Price with higher quality 3,Free sample 4,We are sincerely responsible for the "product quality" and "After Service" Upbio is Specializ

(S)-Benzyl (tetrahydro-2,5-dioxo-3-furyl)carbamate

Cas:4515-23-5

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

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Qingdao Beluga Import and Export Co., LTD

N-CARBOBENZYLOXY-L-ASPARTIC ANHYDRIDE CAS:4515-23-5 Qingdao Belugas Import and Export Co., Ltd. is a scientific and technological company integrating research and development, production and trade of chemical intermediates, specializing in high qual

N-CARBOBENZYLOXY-L-ASPARTIC ANHYDRIDE CAS:4515-23-5

Cas:4515-23-5

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Shandong Hanjiang Chemical Co., Ltd.

Hello, dear friend! I'm Hansen and Allen from China. Welcome to my lookchem mall! The following is a brief introduction of our company's products and services. If you are interested in our products, please contact us by emai

(S)-Benzyl (tetrahydro-2,5-dioxo-3-furyl)carbamate

Cas:4515-23-5

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Afine Chemicals Limited

Company Introduction 1. Established in 2005, with two independent business divisions: Fine chemicals division; Pharmaceutical division. 2. Main product: Optical brightener Textile auxiliary Dye stuff Pigments

N-CARBOBENZYLOXY-L-ASPARTIC ANHYDRIDE

Cas:4515-23-5

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

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Hangzhou J&H Chemical Co., Ltd.

J&H CHEM R&D center can offer custom synthesis according to the contract research and development services for the fine chemicals, pharmaceutical, biotechnique and some of the other chemicals. J&H CHEM has some Manufacturing base in Jia

(S)-Benzyl (tetrahydro-2,5-dioxo-3-furyl)carbamate

Cas:4515-23-5

Min.Order:0

Negotiable

Type:Lab/Research institutions

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Zibo Hangyu Biotechnology Development Co., Ltd

Zibo Hangyu Biotechnology Development Co., Ltd is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality pharmaceuticals, intermediates, special chemicals and OLED intermediates and other fine chemi

Benzyl N-[(3s)-2,5-dioxooxolan-3-yl]carbamate

Cas:4515-23-5

Min.Order:10 Gram

FOB Price: $100.0

Type:Lab/Research institutions

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Shanghai Minstar Chemical Co., Ltd

N-CARBOBENZYLOXY-L-ASPARTIC ANHYDRIDE Chemical Properties Melting point 123-124 °C(lit.) Boiling point 490℃ density 1.37 Fp 250℃ pka 9.93±0.20(Predicted) optical activity [α]20/D 25°, c = 1 in methanol Safet

Cbz-L-Aspartic anhydride

Cas:4515-23-5

Min.Order:1 Gram

FOB Price: $65.0

Type:Lab/Research institutions

inquiry

Hunan chemfish Pharmaceutical co.,Ltd

Hunan chemfish Pharmaceutical co.,Ltd a comprehensive enterprise, is located in High-Tech Science Park,Changsha,Chia . Specializing in R&D, manufacture and marketing, we provide a wide range of products and the most professional services to meet the

N-Alpha-t-butyloxycarbonyl-l-glutamic acid beta-allyl ester

Cas:4515-23-5

Min.Order:0

Negotiable

Type:Manufacturers

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Shanghai Finebiotech Co.,Ltd.

Shanghai Finebiotech Co.,Ltd.was established in 2020, which providing professional chemical services. As a customer-oriented company, we have distinguished ourself from others in providing worldwide customers with cost-effective and efficient service

(S)-Benzyl 2,5-dioxotetrahydrofuran-3-ylcarbamate

Cas:4515-23-5

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Henan Tianfu Chemical Co., Ltd.

1.Our services:A.Supply sampleB.The packing also can be according the customers` requirmentC.Any inquiries will be replied within 24 hoursD.we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate.

(S)-Benzyl (tetrahydro-2,5-dioxo-3-furyl)carbamate

Cas:4515-23-5

Min.Order:0

Negotiable

Type:Lab/Research institutions

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Antimex Chemical Limied

Ansciep Chemical is a professional enterprise manufacturing and distributing fine chemicals and speciality chemicals. We have been dedicated to heterocycle compounds and phenyl rings for tens of years. This is our mature product for export. Our quali

(S)-Benzyl (tetrahydro-2,5-dioxo-3-furyl)carbamate

Cas:4515-23-5

Min.Order:0

Negotiable

Type:Lab/Research institutions

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Guangdong Juda Chemical Industrial Co.,Limited

Appearance:solid or liquid Storage:sealed in cool and dry place Package:As customer's requested Application:Pharma Intermediate Transportation:by courier/air/sea Port:Any port in China

N-CARBOBENZYLOXY-L-ASPARTIC ANHYDRIDE CAS No.4515-23-5

Cas:4515-23-5

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Hangzhou Fandachem Co.,Ltd

(S)-(2,5-Dioxo-tetrahydro-furan-3-yl)-carbamic acid benzyl esterAppearance:white crystalline powder Storage:Store in dry, dark and ventilated place Package:25KG drum Application:pharmaceutical intermediate Transportation:by air, by sea, by express

(S)-(2,5-Dioxo-tetrahydro-furan-3-yl)-carbamic acid benzyl ester

Cas:4515-23-5

Min.Order:0

Negotiable

Type:Other

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Henan Kanbei Chemical Co.,LTD

factory?direct?saleAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:healing drugs Transportation:By sea Port:Shanghai/tianjin

N-CARBOBENZYLOXY-L-ASPARTIC ANHYDRIDE

Cas:4515-23-5

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

SAGECHEM LIMITED

4515-23-5 Application:intermediate

Carbamic acid, [(3S)-tetrahydro-2,5-dioxo-3-furanyl]-, phenylmethyl ester

Cas:4515-23-5

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Hunan Russell Chemicals Technology Co.,Ltd

low price and high purityAppearance:solid or liquid Storage:in sealed air resistant place Package:As customer require Application:Pharma;Industry;Agricultural Transportation:by sea or by airplane Port:any port in China

N-Z-L-Aspartic anhydride, 95% 4515-23-5

Cas:4515-23-5

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Shanghai Chinqesen Biotechnology Co., Ltd.

Good Quality Package:1kg/bag Application:Medical or chemical Transportation:Air/Train/Sea Port:Shenzhen

4515-23-5

Cas:4515-23-5

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Chemsigma International Co.,Ltd.

bulk?production Application:Pharmaceutical intermediates

N-CARBOBENZYLOXY-L-ASPARTIC ANHYDRIDE

Cas:4515-23-5

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

ZHEJIANG JIUZHOU CHEM CO.,LTD

factory?direct?saleAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:healing drugs Transportation:By sea Port:Shanghai/tianjin

N-CARBOBENZYLOXY-L-ASPARTIC ANHYDRIDE

Cas:4515-23-5

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Beantown Chemical

in stock Application:4515-23-5

N-Z-L-Aspartic anhydride, 95%

Cas:4515-23-5

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Amadis Chemical Co., Ltd.

1.Professional synthesis laboratory and production base. 2.Strong synthesis team and service team. 3.Professional data management system. 4.We provide the professional test date and product information ,ex. HNMR ,CNMR,FNMR, HPLC/G

N-Carbobenzyloxy-l-aspartic anhydride

Cas:4515-23-5

Min.Order:10 Milligram

Negotiable

Type:Lab/Research institutions

inquiry

ENAO Chemical Co, Limited

For quick quotation, please send us the inquiry include CAS#, Structure, Chemical Name, quantity, purity, as well as any additional specifications you require, we will try to get back to you within 24 hours. Our Services Besides manufacturing,

(S)-Benzyl (2,5-dioxotetrahydrofuran-3-yl)carbamate

Cas:4515-23-5

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Hebei Ruishun Trade Co.,Ltd

Superiority 1.We have more than 10 years experience in this area. 2.We could offer you competitive prices with satisfied quality. 3.Our company provides after-sale service and technical assistance as the customers requirements. 4.As first c

N-Z-L-Aspartic anhydride

Cas:4515-23-5

Min.Order:1 Kilogram

FOB Price: $2.0

Type:Trading Company

inquiry

HuBei Ipure Biotech CO.,ltd

HuBei ipure is a diversified product production and operation enterprise, with API, pharma intermediates, and other fine chemicals as well as R&D and pigments development and sales as one of the large enterprises, with more than 130 acres of pl

N-CARBOBENZYLOXY-L-ASPARTIC ANHYDRIDE

Cas:4515-23-5

Min.Order:1 Gram

FOB Price: $1.0

Type:Trading Company

inquiry

Shanghai Hanhong Scientific Co.,Ltd.

factory,reasonable price Appearance:detailed see specifications Storage:Store in dry, dark and ventilated place. Package:according to the clients requirement Application:pharmaceutical intermediates Transportation:by courier,air or sea Port:c

N-Carbobenzoxy-L-aspartic anhydride4515-23-5

Cas:4515-23-5

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Shanghai Apeptide Co., Ltd.

Apeptide is a famous-peptide manufacturer in China,We supply high quality peptides(Custom Peptides\Amino acids\API pepitdes and so on )with the best competitive price and short lead time.,Please check our website: www.apeptides.com/en/Appearance:pow

N-Carbobenzoxy-L-aspartic anhydride

Cas:4515-23-5

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Shanghai united Scientific Co.,Ltd.

United Scientific Company Located in Shanghai of China , is a competitive player in the global specialty and fine chemical market. Fenghua has both the expertise and flexibility to produce a wide range of chemicals. Focusing on developing the innovat

(S)-Benzyl (tetrahydro-2,5-dioxo-3-furyl)carbamate

Cas:4515-23-5

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Shanghai AngewChem Co., Ltd.

Shanghai AngewChemCo., Ltd. is an innovative enterprise on fine chemicals and pharmaceuticals. Based on Shanghai R&D center and Hunan chemical manufacturing plant, we offer chemical research, process development, and large-scale production. Complete

Cbz-L-Aspartic anhydride

Cas:4515-23-5

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Synthetic route

N-Cbz-L-Asp
1152-61-0

N-Cbz-L-Asp

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

Conditions
ConditionsYield
100%
With dicyclohexyl-carbodiimide In ethyl acetate 1.) 1 h, 0 deg C, 2.) 24 h, r.t.;98%
With acetic anhydride for 0.0166667h; microwave irradiation;98%
N-Cbz-L-Asp
1152-61-0

N-Cbz-L-Asp

A

benzyl N-[(3R)-2,5-dioxotetrahydrofuran-3-yl]carbamate
75443-62-8

benzyl N-[(3R)-2,5-dioxotetrahydrofuran-3-yl]carbamate

B

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

Conditions
ConditionsYield
With acetic anhydride at 20 - 45℃; for 2.25h; Product distribution; Further Variations:; Reagents; Solvents; Temperatures;
benzyl chloroformate
501-53-1

benzyl chloroformate

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 89 percent
2: 98 percent / dicyclohexylcarbodiimide / ethyl acetate / 1.) 1 h, 0 deg C, 2.) 24 h, r.t.
View Scheme
Multi-step reaction with 2 steps
1: K2CO3 / H2O / Ambient temperature
2: Ac2O / acetic acid / Ambient temperature
View Scheme
Multi-step reaction with 2 steps
1: K2CO3 / H2O
2: Ac2O / acetic acid
View Scheme
benzyl alcohol
100-51-6

benzyl alcohol

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: toluene / anfangs unter Kuehlung
2: MgO; water; diethyl ether
3: acetic acid anhydride
View Scheme
n-Dodecylamine
124-22-1

n-Dodecylamine

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

N-dodecyl-2-carbobenzyloxyaminosuccinamic acid

N-dodecyl-2-carbobenzyloxyaminosuccinamic acid

Conditions
ConditionsYield
With triethylamine In dichloromethane for 12h;97%
With triethylamine In dichloromethane for 12h;97%
N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

benzyl (3S)-5-oxotetrahydro-3-furanylcarbamate
87219-29-2

benzyl (3S)-5-oxotetrahydro-3-furanylcarbamate

Conditions
ConditionsYield
With sodium tetrahydroborate In tetrahydrofuran91%
With sodium tetrahydroborate at 0℃; for 3h;91%
With sodium tetrahydroborate86%
aniline
62-53-3

aniline

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

benzyloxycarbonyl-L-aspartic acid dianilide
685139-81-5

benzyloxycarbonyl-L-aspartic acid dianilide

Conditions
ConditionsYield
Stage #1: N-benzyloxycarbonyl-L-aspartic acid anhydride In dimethyl sulfoxide at 20℃; for 3h;
Stage #2: aniline With N-(3-dimethylaminopropyl)-N-ethylcarbodiimide In N,N-dimethyl-formamide at 20℃; for 24h;
87%
Stage #1: N-benzyloxycarbonyl-L-aspartic acid anhydride In N,N-dimethyl-formamide at 20℃; for 3h;
Stage #2: aniline With N-(3-dimethylaminopropyl)-N-ethylcarbodiimide In N,N-dimethyl-formamide at 20℃; for 24h;
87%
3-methyl-1,2,4-thiadiazol-5-amine
17467-35-5

3-methyl-1,2,4-thiadiazol-5-amine

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

2-benzyloxycarbonylamino-N-(3-methyl-[1,2,4]thiadiazol-5-yl)-succinamic acid
403736-43-6

2-benzyloxycarbonylamino-N-(3-methyl-[1,2,4]thiadiazol-5-yl)-succinamic acid

Conditions
ConditionsYield
In dimethyl sulfoxide at 20℃; for 2h;85%
benzyl alcohol
100-51-6

benzyl alcohol

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

Z-Asp-OBn
4779-31-1

Z-Asp-OBn

Conditions
ConditionsYield
at 90℃; for 3.5h;82%
at 90℃; for 3.5h;72%
ethanol
64-17-5

ethanol

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

(S)-3-(benzyloxycarbonylamino)-4-ethoxy-4-oxobutanoic acid
4668-43-3

(S)-3-(benzyloxycarbonylamino)-4-ethoxy-4-oxobutanoic acid

Conditions
ConditionsYield
at 20℃; for 36h;81%
Heating;
With N-cyclohexyl-cyclohexanamine In diethyl ether
for 18h; Product distribution / selectivity; Heating / reflux;
3,4-dimethoxyaniline
6315-89-5

3,4-dimethoxyaniline

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

[1,2-bis-(3,4-dimethoxy-phenylcarbamoyl)-ethyl]-carbamic acid benzyl ester
932743-84-5

[1,2-bis-(3,4-dimethoxy-phenylcarbamoyl)-ethyl]-carbamic acid benzyl ester

Conditions
ConditionsYield
With N-(3-dimethylaminopropyl)-N-ethylcarbodiimide In N,N-dimethyl-formamide at 20℃; for 24h;79%
N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

(3S)-benzyl N-(1-hydroxy-2,5-dioxo-pyrrolidin-3-yl)carbamate

(3S)-benzyl N-(1-hydroxy-2,5-dioxo-pyrrolidin-3-yl)carbamate

Conditions
ConditionsYield
Stage #1: N-benzyloxycarbonyl-L-aspartic acid anhydride With sodium hydroxide; hydroxylamine hydrochloride In 1,4-dioxane; water at 19.85 - 49.85℃; for 1.25h;
Stage #2: at 124.85℃; for 0.333333h;
77%
With sodium hydroxide; hydroxylamine hydrochloride In 1,4-dioxane; water at 60℃; for 2h;75%
With hydroxylamine hydrochloride; sodium carbonate In water at 0℃; for 1h;54%
benzylamine
100-46-9

benzylamine

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

(S)-(1-benzyl-2,5-dioxo-pyrrolidin-3-yl)carbamic acid benzyl ester
124166-11-6

(S)-(1-benzyl-2,5-dioxo-pyrrolidin-3-yl)carbamic acid benzyl ester

Conditions
ConditionsYield
toluene-4-sulfonic acid In DMF (N,N-dimethyl-formamide); toluene at 22 - 110℃; for 31h; Heating / reflux; Azeotropic dehydratation;77%
toluene-4-sulfonic acid In DMF (N,N-dimethyl-formamide); toluene at 30 - 110℃; for 25h; Heating / reflux;n/a
In ethanol at 20℃; for 18h;n/a
4-tert-Butylaniline
769-92-6

4-tert-Butylaniline

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

[1,2-bis-(4-tert-butyl-phenylcarbamoyl)-ethyl]-carbamic acid benzyl ester
918309-76-9

[1,2-bis-(4-tert-butyl-phenylcarbamoyl)-ethyl]-carbamic acid benzyl ester

Conditions
ConditionsYield
With N-(3-dimethylaminopropyl)-N-ethylcarbodiimide In N,N-dimethyl-formamide at 20℃; for 25h;73%
O-benzylhydoxylamine hydrochloride
2687-43-6

O-benzylhydoxylamine hydrochloride

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

((S)-1-Benzyloxy-2,5-dioxo-pyrrolidin-3-yl)-carbamic acid benzyl ester

((S)-1-Benzyloxy-2,5-dioxo-pyrrolidin-3-yl)-carbamic acid benzyl ester

Conditions
ConditionsYield
In toluene for 1h; Heating;72%
N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

N-benzyloxycarbonyl-L-aspartic acid α-p-nitrobenzyl ester
4668-44-4

N-benzyloxycarbonyl-L-aspartic acid α-p-nitrobenzyl ester

Conditions
ConditionsYield
69%
p-toluidine
106-49-0

p-toluidine

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

A

(S)-3-Benzyloxycarbonylamino-N-p-tolyl-succinamic acid

(S)-3-Benzyloxycarbonylamino-N-p-tolyl-succinamic acid

B

(S)-2-Benzyloxycarbonylamino-N-p-tolyl-succinamic acid

(S)-2-Benzyloxycarbonylamino-N-p-tolyl-succinamic acid

Conditions
ConditionsYield
With acetic acid In benzene for 0.166667h; Heating; Yields of byproduct given;A 67%
B n/a
In dimethyl sulfoxide for 0.333333h; Ambient temperature; Yield given. Yields of byproduct given;
4-methoxy-aniline
104-94-9

4-methoxy-aniline

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

[(S)-1,2-Bis-(4-methoxy-phenylcarbamoyl)-ethyl]-carbamic acid benzyl ester

[(S)-1,2-Bis-(4-methoxy-phenylcarbamoyl)-ethyl]-carbamic acid benzyl ester

Conditions
ConditionsYield
Stage #1: N-benzyloxycarbonyl-L-aspartic acid anhydride In N,N-dimethyl-formamide at 20℃; for 3h;
Stage #2: 4-methoxy-aniline With N-(3-dimethylaminopropyl)-N-ethylcarbodiimide In N,N-dimethyl-formamide at 20℃; for 24h;
60%
methanol
67-56-1

methanol

(3-methoxyphenyl)magnesium bromide
36282-40-3

(3-methoxyphenyl)magnesium bromide

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

A

(3S)-methyl 3-(benzyloxycarbonylamino)-4-(3-methoxyphenyl)-4-oxobutanoate

(3S)-methyl 3-(benzyloxycarbonylamino)-4-(3-methoxyphenyl)-4-oxobutanoate

B

dimethyl (2S)-2-[(phenylmethoxy)carbonylamino]-butane-1,4-dioate
35909-93-4

dimethyl (2S)-2-[(phenylmethoxy)carbonylamino]-butane-1,4-dioate

Conditions
ConditionsYield
Stage #1: (3-methoxyphenyl)magnesium bromide; N-benzyloxycarbonyl-L-aspartic acid anhydride In tetrahydrofuran at -78℃; for 4h;
Stage #2: With citric acid In tetrahydrofuran at -78 - 20℃;
Stage #3: methanol With thionyl chloride
A 60%
B n/a
N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

(3S)-3-benzyloxycarbonylamino-4-hydroxybutanoic acid
94664-82-1

(3S)-3-benzyloxycarbonylamino-4-hydroxybutanoic acid

Conditions
ConditionsYield
With sodium tetrahydroborate In tetrahydrofuran for 1h; Ambient temperature;59%
Multi-step reaction with 2 steps
1: NaBH4 / tetrahydrofuran / 16 h / 20 °C
2: aq. CsCO3 / acetone / 3 h / 20 °C
View Scheme
aniline
62-53-3

aniline

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

A

N-Benzyloxycarbonyl-L-asparaginsaeure-β-anilid
30750-71-1

N-Benzyloxycarbonyl-L-asparaginsaeure-β-anilid

B

Cbz-Asp-anilide

Cbz-Asp-anilide

Conditions
ConditionsYield
With acetic acid In benzene for 0.166667h; Heating; Yields of byproduct given;A n/a
B 58%
In dimethyl sulfoxide for 0.333333h; Ambient temperature; Yield given. Yields of byproduct given;
4-aminomethyl-benzoic acid ; hydrochloride
67688-72-6

4-aminomethyl-benzoic acid ; hydrochloride

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

(S)-4-((3-(benzyloxycarbonylamino)-2,5-dioxopyrrolidin-1-yl)methyl)benzoic acid
953435-25-1

(S)-4-((3-(benzyloxycarbonylamino)-2,5-dioxopyrrolidin-1-yl)methyl)benzoic acid

Conditions
ConditionsYield
Stage #1: 4-aminomethyl-benzoic acid ; hydrochloride; N-benzyloxycarbonyl-L-aspartic acid anhydride With pyridine; triethylamine at 20℃; for 9h;
Stage #2: With acetic acid at 83℃; for 24h;
56%
methanol
67-56-1

methanol

phenylmagnesium chloride
100-59-4

phenylmagnesium chloride

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

A

dimethyl (2S)-2-[(phenylmethoxy)carbonylamino]-butane-1,4-dioate
35909-93-4

dimethyl (2S)-2-[(phenylmethoxy)carbonylamino]-butane-1,4-dioate

B

(3S)-methyl 3-(benzyloxycarbonylamino)-4-oxo-4-phenylbutanoate

(3S)-methyl 3-(benzyloxycarbonylamino)-4-oxo-4-phenylbutanoate

Conditions
ConditionsYield
Stage #1: phenylmagnesium chloride; N-benzyloxycarbonyl-L-aspartic acid anhydride In tetrahydrofuran at -78℃; for 4h;
Stage #2: With citric acid In tetrahydrofuran at -78 - 20℃;
Stage #3: methanol With thionyl chloride
A n/a
B 54%
methanol
67-56-1

methanol

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

(S)-2-benzyloxycarbonylamino-succinic acid 1-methyl ester
4668-42-2

(S)-2-benzyloxycarbonylamino-succinic acid 1-methyl ester

Conditions
ConditionsYield
Stage #1: methanol; N-benzyloxycarbonyl-L-aspartic acid anhydride In ethyl acetate at 20℃; for 5h;
Stage #2: With N-cyclohexyl-cyclohexanamine In di-isopropyl ether
Stage #3: With hydrogenchloride In water; ethyl acetate pH=2;
54%
N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

N-benzyloxycarbonyl-L-aspartic acid thioanhydride
1000278-32-9

N-benzyloxycarbonyl-L-aspartic acid thioanhydride

Conditions
ConditionsYield
With sodium sulfide; tetrabutylammomium bromide In dichloromethane; water for 3h;47%
With sodium sulfide; tetrabutylammomium bromide In dichloromethane; water for 3h;47%
1-(2-aminoethyl)-3-(benzyloxy)-2-methylpyridin-4(1H)-one hydrochloride salt

1-(2-aminoethyl)-3-(benzyloxy)-2-methylpyridin-4(1H)-one hydrochloride salt

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

(S)-4-((2-(3-(benzyloxy)-2-methyl-4-oxopyridin-1(4H)-yl)ethyl)amino)-2-(((benzyloxy)carbonyl)amino)-4-oxobutanoic acid

(S)-4-((2-(3-(benzyloxy)-2-methyl-4-oxopyridin-1(4H)-yl)ethyl)amino)-2-(((benzyloxy)carbonyl)amino)-4-oxobutanoic acid

Conditions
ConditionsYield
Stage #1: 1-(2-aminoethyl)-3-(benzyloxy)-2-methylpyridin-4(1H)-one hydrochloride salt With potassium hydroxide In methanol for 1h; Inert atmosphere;
Stage #2: N-benzyloxycarbonyl-L-aspartic acid anhydride In N,N-dimethyl-formamide at 59.84℃; for 3h; Inert atmosphere;
44%
methanol
67-56-1

methanol

n-butyl magnesium bromide
693-03-8

n-butyl magnesium bromide

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

A

(S)-3-Benzyloxycarbonylamino-4-oxo-octanoic acid methyl ester

(S)-3-Benzyloxycarbonylamino-4-oxo-octanoic acid methyl ester

B

dimethyl (2S)-2-[(phenylmethoxy)carbonylamino]-butane-1,4-dioate
35909-93-4

dimethyl (2S)-2-[(phenylmethoxy)carbonylamino]-butane-1,4-dioate

Conditions
ConditionsYield
Stage #1: n-butyl magnesium bromide; N-benzyloxycarbonyl-L-aspartic acid anhydride In tetrahydrofuran at -78℃; for 4h;
Stage #2: With citric acid In tetrahydrofuran at -78 - 20℃;
Stage #3: methanol With thionyl chloride
A 41%
B n/a
N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

1-(3-aminopropyl)-3-(benzyloxy)-2-methylpyridin-4(1H)-one hydrochloride salt

1-(3-aminopropyl)-3-(benzyloxy)-2-methylpyridin-4(1H)-one hydrochloride salt

(S)-4-((3-(3-(benzyloxy)-2-methyl-4-oxopyridin-1(4H)-yl)propyl)amino)-2-(((benzyloxy)carbonyl)amino)-4-oxobutanoic acid

(S)-4-((3-(3-(benzyloxy)-2-methyl-4-oxopyridin-1(4H)-yl)propyl)amino)-2-(((benzyloxy)carbonyl)amino)-4-oxobutanoic acid

Conditions
ConditionsYield
Stage #1: 1-(3-aminopropyl)-3-(benzyloxy)-2-methylpyridin-4(1H)-one hydrochloride salt With potassium hydroxide In methanol for 1h; Inert atmosphere;
Stage #2: N-benzyloxycarbonyl-L-aspartic acid anhydride In N,N-dimethyl-formamide at 59.84℃; for 3h; Inert atmosphere;
22%
(S)-serine methyl ester
2788-84-3

(S)-serine methyl ester

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

N-(N-benzyloxycarbonyl-L-α-aspartyl)-L-serine methyl ester

N-(N-benzyloxycarbonyl-L-α-aspartyl)-L-serine methyl ester

Conditions
ConditionsYield
With chloroform
L-Valine methyl ester
4070-48-8

L-Valine methyl ester

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

N-(N-benzyloxycarbonyl-L-α-aspartyl)-L-valine methyl ester
159879-61-5

N-(N-benzyloxycarbonyl-L-α-aspartyl)-L-valine methyl ester

Conditions
ConditionsYield
With ethyl acetate
With potassium hydrogencarbonate; ethyl acetate
L-Valine methyl ester
4070-48-8

L-Valine methyl ester

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

A

N-(N-benzyloxycarbonyl-L-α-aspartyl)-L-valine methyl ester
159879-61-5

N-(N-benzyloxycarbonyl-L-α-aspartyl)-L-valine methyl ester

B

N-(N-benzyloxycarbonyl-L-β-aspartyl)-L-valine methyl ester
159879-62-6

N-(N-benzyloxycarbonyl-L-β-aspartyl)-L-valine methyl ester

Conditions
ConditionsYield
With potassium hydrogencarbonate; ethyl acetate
With ethyl acetate
L-glutamic acid diethyl ester
16450-41-2

L-glutamic acid diethyl ester

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

A

N-(N-benzyloxycarbonyl-L-β-aspartyl)-L-glutamic acid diethyl ester

N-(N-benzyloxycarbonyl-L-β-aspartyl)-L-glutamic acid diethyl ester

B

N-(N-benzyloxycarbonyl-L-α-aspartyl)-L-glutamic acid diethyl ester
112842-55-4

N-(N-benzyloxycarbonyl-L-α-aspartyl)-L-glutamic acid diethyl ester

Conditions
ConditionsYield
With ethyl acetate
4-methyl pentanamine
5344-20-7

4-methyl pentanamine

N-benzyloxycarbonyl-L-aspartic acid anhydride
4515-23-5

N-benzyloxycarbonyl-L-aspartic acid anhydride

L-aspartic acid isohexyl imide
121790-47-4

L-aspartic acid isohexyl imide

Conditions
ConditionsYield
at 130℃; Hydrieren des Reaktionsprodukts an Palladium/Kohle in Essigsaeure enthaltendem Aethanol;

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