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Dayang Chem (Hangzhou) Co.,Ltd.

DayangChem exported this product to many countries and regions at best price. If you are looking for the material's manufacturer or supplier in China, DayangChem is your best choice. Pls contact with us freely for getting detailed product spe

Levetiracetam Manufacturer/High quality/Best price/In stock

Cas:102767-28-2

Min.Order:1 Kilogram

FOB Price: $3.0

Type:Lab/Research institutions

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Sinoway Industrial Co., Ltd.

We are very compeitive on Levetiracetam.Our mfr is GMP certified for this item with CEP document. Product Name: Levetiracetam CAS: 102767-28-2 MF: C8H14N2O2

factory supply GMP,DMF Levetiracetam

Cas:102767-28-2

Min.Order:1 Kilogram

Negotiable

Type:Trading Company

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Hangzhou Dingyan Chem Co., Ltd

Items Standard Result Appearance White or almost white powder White powder Assay 98.0%-102.0%

High purity Various Specifications Levetiracetam CAS:102767-28-2

Cas:102767-28-2

Min.Order:1 Gram

FOB Price: $100.0 / 500.0

Type:Manufacturers

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Simagchem Corporation

Welcome to Simagchem, your partner in China as a premier supply of bulk specialty chemicals for industry and life science. We introduce experienced quality product and exceptional JIT service with instant market intelligence in China to benefit our

High quality Levetiracetam supplier in China

Cas:102767-28-2

Min.Order:1 Metric Ton

Negotiable

Type:Manufacturers

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Kono Chem Co.,Ltd

Specifications 1.good quality 2.high puriy 3.best service 1.Base Date Name:Levetiracetam CAS No.:102767-28-2 Molecular formular:C8H14N2O2 Levetiracetam Chemica

CAS:102767-28-2 Levetiracetam

Cas:102767-28-2

Min.Order:1 Kilogram

Negotiable

Type:Other

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Hangzhou JINLAN Pharm-Drugs Technology Co., Ltd

Jinlan Pharm-Drugs Technology Co.,Limited (with its export company Hangzhou Royall Import & Export Co.,Ltd.)is located in Hangzhou, Zhejiang Province. Neighboring Ningbo port, Shanghai port, Hangzhou Xiaoshan Int’l Airport and Shanghai Pu

Top Quality 99.0% Powder Levetiracetam 102767-28-2

Cas:102767-28-2

Min.Order:10 Gram

Negotiable

Type:Manufacturers

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Hebei yanxi chemical co.,LTD.

hebei yanxi chemical co., LTD who registered capital of 10 million yuan, nearly to $2 million, we have a pharmaceutical raw materials factory production of pharmaceutical raw materials, and a reagent r&d center, and we do research and developm

Levetiracetam High Quality!! CAS NO.102767-28-2

Cas:102767-28-2

Min.Order:1 Metric Ton

FOB Price: $1.0 / 3.0

Type:Manufacturers

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Wuhan Fortuna Chemical Co.,Ltd

1. Guaranteed purity; 2. Large quantity in stock; 3. Largest manufacturer; 4. Best service after shipment with email; 5. High quality & competitive price; ...... Appearance:White or almost white powder Storage:Store at RT. Package

Good quality Levetiracetam CAS 102767-28-2 complies with USP standard

Cas:102767-28-2

Min.Order:1 Kilogram

FOB Price: $100.0 / 150.0

Type:Trading Company

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Henan Allgreen Chemical Co.,Ltd

high quality Appearance:White or off-white Solid Storage:Sealed, dry, microtherm , avoid light and smell. Package:According to the demand of customer Application:Organic synthesis Transportation:by air or by sea Port:shanghai

Levetiracetam

Cas:102767-28-2

Min.Order:1 Kilogram

Negotiable

Type:Manufacturers

inquiry

Ality Chemical Corporation

The above product is Ality Chemical's strong item with best price, good quality and fast supply. Ality Chemical has been focusing on the research and production of this field for over 14 years. At the same time, we are always committed to providi

Factory Supply Levetiracetam

Cas:102767-28-2

Min.Order:1

Negotiable

Type:Other

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Xi'an Xszo Chem Co., Ltd.

1. Factory price and high quality must be guaranteed, base on 8 years of production and R&D experience2. Free samples will be provided,ensure specifications and quality are right for customer3. Customers will receive the most professional technical s

High Quality 99% 102767-28-2 Levetiracetam Manufacturer

Cas:102767-28-2

Min.Order:1 Gram

FOB Price: $0.1

Type:Manufacturers

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HANGZHOU CLAKE BIOTECH CO.,LTD

1. GMP AVALIABLE ; 2. IN STOCK 3. FAST REPLY QUALIFED ; EFFICIENCY; RESPONSIBLE Appearance:white crystalline powder Storage:in cool Package:as request Application:active pharmaceutical ingredient Transportation:Air / SEA BOTH OK Port:

Levetiracetam

Cas:102767-28-2

Min.Order:10 Kilogram

Negotiable

Type:Trading Company

inquiry

Shanghai Seasonsgreen Chemical Co.,Ltd

Shanghai Seasonsgreen Chemical is a high-tech research and development, production, sale and custom synthesis set in one high-tech chemical products enterprises. Our sales and marketing division is located in Shanghai, serving international pharmaceu

lower price High quality Levetiracetam

Cas:102767-28-2

Min.Order:1 Kilogram

FOB Price: $1.0

Type:Manufacturers

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COLORCOM LTD.

Colorcom is a global leader in industrial chemical manufacturing and is continuously innovating and transforming to exceed client expectations and industry standards. Colorcom prides itself on superior customer and technical focus, while focusing on

Levetiracetam

Cas:102767-28-2

Min.Order:1 Metric Ton

Negotiable

Type:Manufacturers

inquiry

Chemwill Asia Co., Ltd.

Our main production base is located in Xuzhou industry park. We are certified both to the ISO 9001 and ISO 14001 Standards, have a safety management system in place.Our R&D team masters core technology for process-design of target building block

Levetiracetam

Cas:102767-28-2

Min.Order:5 Kiloliter

FOB Price: $1.2 / 5.0

Type:Manufacturers

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Hubei DiBo chemical co., LTD

Name:Levetiracetam CAS NO:102767-28-2 Grade:Medical scientific research and export Molecular formula:C8H14N2O2 Molecular weight:170.209 Product Quality 12 years of chemical raw materials Mature operation of the industry System stability D

Levetiracetam/cas:102767-28-2/Raw material spot

Cas:102767-28-2

Min.Order:25 Kilogram

FOB Price: $1.0 / 2.0

Type:Other

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LIDE PHARMACEUTICALS LIMITED

LIDE PHARMACEUTICALS LIMITED is a professional chemicals and APIs leading manufacturer in China. Our core business line covers APIs, Intermediates, Herb extract, etc.

Levetiracetam

Cas:102767-28-2

Min.Order:1 Metric Ton

FOB Price: $0.9 / 1.0

Type:Lab/Research institutions

inquiry

Hebei Nengqian Chemical Import and Export Co., LTD

Our advantages: 1. All inquiries will be replied within 12 hours. 2. Dedication to quality, supply & service. 3. Strictly on selecting raw materials. 4. Reasonable & competitive price, fast lead time. 5. Sample is available for your eva

Levetiracetam

Cas:102767-28-2

Min.Order:1 Kilogram

FOB Price: $9.0 / 99.0

Type:Trading Company

inquiry

Henan Tianfu Chemical Co., Ltd.

Our company was built in 2009 with an ISO certificate.In the past 5 years, we have grown up as a famous fine chemicals supplier in China and we had established stable business relationships with Samsung,LG,Merck,Thermo Fisher Scientific and so on.O

Levetiracetam cas no: 102767-28-2

Cas:102767-28-2

Min.Order:1 Kilogram

FOB Price: $100000.0

Type:Lab/Research institutions

inquiry

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

New production CAS 102767-28-2 with best quality

Cas:102767-28-2

Min.Order:1 Kilogram

FOB Price: $139.0 / 210.0

Type:Trading Company

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Wuhan Han Sheng New Material Technology Co.,Ltd

Our Advantage: high quality with competitive price High quality standard: BP/USP/EP Enterprise standard All purity customized Fast and safe delivery We have reliable forwarder who can help us deliver our goods more fast and safe. We

Levetiracetam

Cas:102767-28-2

Min.Order:10 Kilogram

Negotiable

Type:Trading Company

inquiry

Hebei Sankai Chemical Technology Co., Ltd

1. Product advantages ♦ High purity, all above 98.5%, no impurities after dissolution ♦ We will test each batch to ensure quality ♦ OEM and private brand services designed for free ♦ Various cap colors available ♦ W

Levetiracetam CAS:102767-28-2

Cas:102767-28-2

Min.Order:1 Metric Ton

FOB Price: $380.0 / 590.0

Type:Trading Company

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Henan Sinotech Import&Export Corporation

Name: Levetiracetam Synonyms: (S)-2-(2-Oxopyrrolidin-1-yl)butanamide CAS no: 102767-28-2 MF: C8H14N2O2 MW: 170.21 Usage: It an anticonvulsant medication used to treat epilepsy. Appearance:White powder Storage:Store in cool and dry place, awa

Levetiracetam

Cas:102767-28-2

Min.Order:1 Metric Ton

FOB Price: $1.0

Type:Other

inquiry

Shijiazhuang Sdyano Fine Chemical Co., Ltd

1. Best prices with satisfied quality; 2. It's clients' right to choose the package's Courier (EMS, DHL, FedEx, UPS); 3.It's clients' right to choose the packing way for his produccts from many recent effective packing ways;

Levetiracetam

Cas:102767-28-2

Min.Order:0 Metric Ton

Negotiable

Type:Trading Company

inquiry

Hubei Langyou International Trading Co., Ltd

Our Adwantage: 1.We have stock so we can delivery quickly at the very day when receive the payment. 2.Best price, first class service, high successful delivery rate. A discount would be given when you make a large order. 3.High quality gua

Pharmaceutical Anti-epileptic Drug Levetiracetam SIB-S1 CAS 102767-28-2 API

Cas:102767-28-2

Min.Order:10 Gram

Negotiable

Type:Other

inquiry

Hefei TNJ chemical industry co.,ltd

1. We are one of the domestic largest manufacturers of API; 2. We are always supplier of products with higher quality and at more competitive price; 3. We are supplier of safe and ecofriendly products ; 4. We provide stable supply and efficie

Manufacturer of Levetiracetam at Factory Price

Cas:102767-28-2

Min.Order:25 Kilogram

Negotiable

Type:Trading Company

inquiry

HANWAYS CHEMPHARM CO.,LIMITED

We are concentrating on APIs and pharmaceutical intermediates. With in depth knowledge and understanding in this industry, we are indulged in supplying a wide assortments of Levetiracetam from Wuhan, Hubei, China. It is made obtai

Levetiracetam

Cas:102767-28-2

Min.Order:100 Gram

FOB Price: $1.0

Type:Trading Company

inquiry

Shanghai Upbio Tech Co.,Ltd

1.No Less 8 years exporting experience. Clients 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 Specialized

Levetiracetam 102767-28-2

Cas:102767-28-2

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Xi'an Faithful Biotech Co., Ltd.

We are the manufacturers and suppliers of API in China, and warehouse in Germany and USA of California, which can quickly and safely deliver to your address 1.High quality and competitive price. 2.Free sample for your evaluation. 3.Promptly delivery

Nutrition Supplement high Quality 99% purity Levetiracetam raw Powder Levetiracetam

Cas:102767-28-2

Min.Order:1 Kilogram

FOB Price: $160.0

Type:Trading Company

inquiry

Hangzhou Huarong Pharm Co., Ltd.

Hangzhou Huarong Pharm Co., Ltd. established since 2009 , has been always focusing on supplying products and services to our clients in the field of small molecule drug. Huarong Pharm has built platforms for the research, development and manufac

Levetiracetam

Cas:102767-28-2

Min.Order:1 Kilogram

FOB Price: $1.0 / 2.0

Type:Lab/Research institutions

inquiry

Synthetic route

1-((S)-1-carbamoylpropyl)-2-oxopyrrolidine-3-carboxylic acid methyl ester
941289-97-0

1-((S)-1-carbamoylpropyl)-2-oxopyrrolidine-3-carboxylic acid methyl ester

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
With water; sodium chloride In N,N-dimethyl-formamide at 130 - 140℃; for 18h; Product distribution / selectivity;100%
In 4-methyl-2-pentanone at 115 - 120℃; for 12h; Product distribution / selectivity;52%
dehydro levetiracetam

dehydro levetiracetam

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
With C68H72Cl2Co2P4; hydrogen In methanol at 50℃; Reagent/catalyst; enantioselective reaction;99.9%
(2S)-2-(3,4-dichloro-2,5-dihydro-2-oxo-1H-pyrrol-1-yl)butanamide

(2S)-2-(3,4-dichloro-2,5-dihydro-2-oxo-1H-pyrrol-1-yl)butanamide

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
With hydrogen; triethylamine; palladium on activated charcoal In ethanol under 2587.71 Torr; for 2h;91%
(S)-2-amino-butanamide hydrochloride
53726-14-0

(S)-2-amino-butanamide hydrochloride

4-Chlorobutanoyl chloride
4635-59-0

4-Chlorobutanoyl chloride

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
Stage #1: (S)-2-amino-butanamide hydrochloride With tetrabutylammomium bromide; sodium sulfate In dichloromethane at 0℃; for 0.5h;
Stage #2: 4-Chlorobutanoyl chloride With potassium hydroxide In dichloromethane at 0℃; for 7h;
89%
Stage #1: (S)-2-amino-butanamide hydrochloride; 4-Chlorobutanoyl chloride With potassium hydroxide; sodium sulfate In acetonitrile at 3 - 5℃; for 5h;
Stage #2: With hydrogenchloride pH=6; Product distribution / selectivity;
84%
With potassium hydroxide; tetrabutylammomium bromide; sodium sulfate; molecular sieve In dichloromethane; ethyl acetate; toluene74.1%
4-Chlorobutanoyl chloride
4635-59-0

4-Chlorobutanoyl chloride

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
Stage #1: (S)-2-amino-butanamide With tetrabutylammomium bromide; potassium hydroxide In dichloromethane at -15 - -5℃; for 2.25h;
Stage #2: 4-Chlorobutanoyl chloride In dichloromethane at -10 - -8℃;
85%
butyl 4-chlorobutyrate
3153-33-1

butyl 4-chlorobutyrate

(S)-2-amino-butanamide hydrochloride
53726-14-0

(S)-2-amino-butanamide hydrochloride

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
With triethylamine; sodium iodide In isopropyl alcohol at 90℃; for 36h; Inert atmosphere;85%
(S)-α-ethyl-2-oxo-1-pyrrolidineacetic acid (R)-α-methylbenzylamine salt
102916-46-1

(S)-α-ethyl-2-oxo-1-pyrrolidineacetic acid (R)-α-methylbenzylamine salt

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
Stage #1: (S)-α-ethyl-2-oxo-1-pyrrolidineacetic acid (R)-α-methylbenzylamine salt With sodium hydroxide In water for 0.5h;
Stage #2: With chloroformic acid ethyl ester In dichloromethane at -10℃; for 2h;
Stage #3: With ammonia In dichloromethane at -15 - -10℃; for 2h; Solvent; Reagent/catalyst;
85%
Multi-step reaction with 3 steps
1.1: sodium hydroxide; water / 0.5 h / 0 - 10 °C
1.2: pH 4 - 5
2.1: toluene-4-sulfonic acid / 7 h / 60 °C
3.1: ammonia / 24 h / 0 - 10 °C
View Scheme
4-chloro-butyric acid ethyl ester
3153-36-4

4-chloro-butyric acid ethyl ester

(S)-2-amino-butanamide hydrochloride
53726-14-0

(S)-2-amino-butanamide hydrochloride

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
With sodium carbonate; sodium iodide In dimethyl sulfoxide at 90℃; for 24h; Reagent/catalyst; Solvent; Temperature; Inert atmosphere;84%
isopropyl 4-chlorobutanoate
3153-34-2

isopropyl 4-chlorobutanoate

(S)-2-amino-butanamide hydrochloride
53726-14-0

(S)-2-amino-butanamide hydrochloride

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
With sodium carbonate; sodium iodide In N,N-dimethyl-formamide at 110℃; for 12h; Inert atmosphere;83%
(S)-N-[1(aminocarbonyl)propyl]-4-bromobutyramide

(S)-N-[1(aminocarbonyl)propyl]-4-bromobutyramide

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
With potassium carbonate In N,N-dimethyl-formamide at 20℃;82%
(2S,3R)-3-methylsulfonyloxy-2-(2-oxopyrrolidin-1-yl)butanamide

(2S,3R)-3-methylsulfonyloxy-2-(2-oxopyrrolidin-1-yl)butanamide

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
With sodium tetrahydroborate; ethanol for 3h; Reflux;81%
C8H15ClN2O2*ClH

C8H15ClN2O2*ClH

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
With potassium hydroxide In dichloromethane at -5 - 0℃; for 3h; Large scale;80.6%
allyl 4-chlorobutyrate
4897-91-0

allyl 4-chlorobutyrate

(S)-2-amino-butanamide hydrochloride
53726-14-0

(S)-2-amino-butanamide hydrochloride

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
With potassium carbonate; potassium iodide In N,N-dimethyl-formamide at 50℃; for 36h; Inert atmosphere;80%
methyl 4-chlorobutyrate
3153-37-5

methyl 4-chlorobutyrate

(S)-2-amino-butanamide hydrochloride
53726-14-0

(S)-2-amino-butanamide hydrochloride

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
With potassium carbonate; potassium iodide In dimethyl sulfoxide at 100℃; for 24h; Reagent/catalyst; Solvent; Temperature; Inert atmosphere;80%
(S)-2-(4-chlorobutyramido)butanamide
102767-31-7

(S)-2-(4-chlorobutyramido)butanamide

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
With potassium tert-butylate In tetrahydrofuran at 0 - 5℃; Reagent/catalyst;78.9%
With potassium hydroxide at 20 - 25℃; for 2.5h;76.4%
With potassium hydroxide; potassium iodide In tert-butyl methyl ether at 20℃; for 4h; Product distribution / selectivity;
With potassium hydroxide In tert-butyl methyl ether at 20℃; for 4h; Product distribution / selectivity;
(2S)-2-(2-oxopyrrolidin-1-yl)butanoic acid
102849-49-0

(2S)-2-(2-oxopyrrolidin-1-yl)butanoic acid

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
Stage #1: (2S)-2-(2-oxopyrrolidin-1-yl)butanoic acid With thionyl chloride In methanol at 45℃;
Stage #2: With ammonia In methanol at 20℃; under 2250.23 Torr; Product distribution / selectivity;
78.4%
Stage #1: (2S)-2-(2-oxopyrrolidin-1-yl)butanoic acid With chloroformic acid ethyl ester; triethylamine In tetrahydrofuran at 0℃; for 0.5h;
Stage #2: With ammonium hydroxide In tetrahydrofuran for 16h;
75%
Stage #1: (2S)-2-(2-oxopyrrolidin-1-yl)butanoic acid With ammonium hydroxide; triethylamine; isobutyl chloroformate In tetrahydrofuran at 0℃; for 0.5h;
Stage #2: With ammonium hydroxide In tetrahydrofuran at 20℃; for 11h;
72%
(S)-methyl 2-(2-oxopyrrolidin-1-yl)-2-butanoate
358629-51-3

(S)-methyl 2-(2-oxopyrrolidin-1-yl)-2-butanoate

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
With ammonia In methanol at 20℃; under 2250.23 Torr; Product distribution / selectivity; Autoclave;78.4%
With ammonia; water at 0 - 20℃; for 14h; Product distribution / selectivity;62.2%
(2S,3R)-3-(4-tolyl)sulfonyloxy-2-(2-oxopyrrolidin-1-yl)butanamide

(2S,3R)-3-(4-tolyl)sulfonyloxy-2-(2-oxopyrrolidin-1-yl)butanamide

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
With methanol; potassium borohydride In dichloromethane for 8h; Reflux;78%
chloroformic acid ethyl ester
541-41-3

chloroformic acid ethyl ester

(2S)-2-(2-oxopyrrolidin-1-yl)butanoic acid
102849-49-0

(2S)-2-(2-oxopyrrolidin-1-yl)butanoic acid

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
With ammonia; triethylamine In molecular sieve; dichloromethane; ethyl acetate; toluene72.3%
(S)-(+)-amino butynamide tartarate

(S)-(+)-amino butynamide tartarate

4-Chlorobutanoyl chloride
4635-59-0

4-Chlorobutanoyl chloride

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
Stage #1: (S)-(+)-amino butynamide tartarate With potassium carbonate; sodium sulfate In acetonitrile at 0 - 5℃;
Stage #2: 4-Chlorobutanoyl chloride In acetonitrile at 0 - 25℃; for 5h;
Stage #3: With sodium hydroxide In acetonitrile at 0 - 5℃; for 10h;
67%
(2S)-2-(2-oxopyrrolidin-1-yl)butanoic acid
102849-49-0

(2S)-2-(2-oxopyrrolidin-1-yl)butanoic acid

A

levetiracetam

levetiracetam

B

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
Stage #1: (2S)-2-(2-oxopyrrolidin-1-yl)butanoic acid With chloroformic acid ethyl ester; triethylamine In tetrahydrofuran at 0℃; for 0.5h;
Stage #2: With ammonium hydroxide In tetrahydrofuran; water at 20℃; for 16h;
A n/a
B 65%
(R)-2-pyrrolidone-N-butyric acid
103833-72-3

(R)-2-pyrrolidone-N-butyric acid

A

levetiracetam

levetiracetam

B

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
Stage #1: (R)-2-pyrrolidone-N-butyric acid With chloroformic acid ethyl ester; triethylamine In tetrahydrofuran at 0℃; for 0.5h;
Stage #2: With ammonium hydroxide In tetrahydrofuran; water at 20℃; for 16h;
A 63%
B n/a
2-(2-oxo-1-pyrrolidinyl)butanenitrile

2-(2-oxo-1-pyrrolidinyl)butanenitrile

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
With sulfuric acid; water In dichloromethane at 100℃; for 0.166667h; Reagent/catalyst; Temperature;50%
(S)-(-)-α-ethyl-2-oxo-1-pyrrolidineacetamide

(S)-(-)-α-ethyl-2-oxo-1-pyrrolidineacetamide

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
With sodium periodate; (x)H2O*O4Ru In ethyl acetate at 20℃; for 0.5h; Solvent; Electrochemical reaction;49%
2,5-dihydro-2,5-dimethoxyfuran
332-77-4

2,5-dihydro-2,5-dimethoxyfuran

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
Stage #1: 2,5-dihydro-2,5-dimethoxyfuran; (S)-2-amino-butanamide With hydrogenchloride In water at 20℃; for 1.5h;
Stage #2: With sodium carbonate In water pH=8 - 9;
Stage #3: With hydrogen; 5%-palladium/activated carbon In ethanol; water for 0.583333h;
13%
1-((S)-1-hydroxybutane-2-yl)pyrrolidin-2-one
909566-58-1

1-((S)-1-hydroxybutane-2-yl)pyrrolidin-2-one

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: 90 percent / 2,2,6,6-tetramethyl-1-piperidinyloxy; sodium hypochlorite; sodium chlorite / acetonitrile; aq. phosphate buffer / 6 h / 25 °C / pH 6.8
2.1: ethyl chloroformate; triethylamine / tetrahydrofuran / 0.5 h / 0 °C
2.2: 75 percent / ammonium hydroxide / tetrahydrofuran / 16 h
View Scheme
Multi-step reaction with 3 steps
1.1: 2,2,6,6-Tetramethyl-1-piperidinyloxy free radical; sodium chlorite; sodium hypochlorite / acetonitrile; aq. phosphate buffer / 7 h / 35 °C / pH 6.7
1.2: 0.75 h / 20 °C / pH 8
1.3: pH 3 - 4
2.1: triethylamine / tetrahydrofuran / 1 h / 0 °C / Inert atmosphere
3.1: ammonium hydroxide / tetrahydrofuran; water / 16 h / 0 - 20 °C / Inert atmosphere
View Scheme
Multi-step reaction with 3 steps
1.1: 2,2,6,6-Tetramethyl-1-piperidinyloxy free radical; sodium chlorite; sodium hypochlorite / acetonitrile; aq. phosphate buffer / 7 h / 35 °C / pH 6.7
1.2: 0.75 h / 20 °C / pH 8
1.3: pH 3 - 4
2.1: triethylamine / tetrahydrofuran / 1 h / 0 °C / Inert atmosphere
3.1: ammonium hydroxide / tetrahydrofuran; water / 16 h / 0 - 20 °C / Inert atmosphere
View Scheme
Multi-step reaction with 2 steps
1: potassium hydroxide; tetrabutylammomium bromide; potassium permanganate / water; dichloromethane / 12.5 h / 20 °C
2: triethylamine; chloroformic acid ethyl ester; ammonium hydroxide / water; tetrahydrofuran / 12.5 h / 0 - 20 °C
View Scheme
(S)-1-(1-(benzyloxy)butan-2-yl)pyrrolidin-2-one
912643-33-5

(S)-1-(1-(benzyloxy)butan-2-yl)pyrrolidin-2-one

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: 97 percent / hydrogen / Pd/C / methanol / 6 h / 760 Torr
2.1: 90 percent / 2,2,6,6-tetramethyl-1-piperidinyloxy; sodium hypochlorite; sodium chlorite / acetonitrile; aq. phosphate buffer / 6 h / 25 °C / pH 6.8
3.1: ethyl chloroformate; triethylamine / tetrahydrofuran / 0.5 h / 0 °C
3.2: 75 percent / ammonium hydroxide / tetrahydrofuran / 16 h
View Scheme
Multi-step reaction with 4 steps
1.1: palladium(II) hydroxide; hydrogen / methanol / 24 h / 20 °C / 3102.97 Torr
2.1: 2,2,6,6-Tetramethyl-1-piperidinyloxy free radical; sodium chlorite; sodium hypochlorite / acetonitrile; aq. phosphate buffer / 7 h / 35 °C / pH 6.7
2.2: 0.75 h / 20 °C / pH 8
2.3: pH 3 - 4
3.1: triethylamine / tetrahydrofuran / 1 h / 0 °C / Inert atmosphere
4.1: ammonium hydroxide / tetrahydrofuran; water / 16 h / 0 - 20 °C / Inert atmosphere
View Scheme
Multi-step reaction with 4 steps
1.1: palladium(II) hydroxide; hydrogen / methanol / 24 h / 20 °C / 3102.97 Torr
2.1: 2,2,6,6-Tetramethyl-1-piperidinyloxy free radical; sodium chlorite; sodium hypochlorite / acetonitrile; aq. phosphate buffer / 7 h / 35 °C / pH 6.7
2.2: 0.75 h / 20 °C / pH 8
2.3: pH 3 - 4
3.1: triethylamine / tetrahydrofuran / 1 h / 0 °C / Inert atmosphere
4.1: ammonium hydroxide / tetrahydrofuran; water / 16 h / 0 - 20 °C / Inert atmosphere
View Scheme
(αS,3S)-4,4-dimethyl-2-oxo-1-phenylpyrrolidin-3-yl 2-(2-oxopyrrolidin-1-yl)butyrate
873786-87-9

(αS,3S)-4,4-dimethyl-2-oxo-1-phenylpyrrolidin-3-yl 2-(2-oxopyrrolidin-1-yl)butyrate

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: 140 mg / LiOH*H2O; H2O2 / tetrahydrofuran / 7 h / 0 °C
2.1: (C2H5)3N; ethyl chloroformate / tetrahydrofuran / 0.5 h / 0 °C
2.2: 65 percent / ammonium hydroxide / tetrahydrofuran; H2O / 16 h / 20 °C
View Scheme
(αR,3S)-4,4-dimethyl-2-oxo-1-phenylpyrrolidin-3-yl 2-(2-oxopyrrolidin-1-yl)butyrate
873786-88-0

(αR,3S)-4,4-dimethyl-2-oxo-1-phenylpyrrolidin-3-yl 2-(2-oxopyrrolidin-1-yl)butyrate

levetiracetam
102767-28-2

levetiracetam

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: 141 mg / LiOH*H2O; H2O2 / tetrahydrofuran / 7 h / 0 °C
2.1: (C2H5)3N; ethyl chloroformate / tetrahydrofuran / 0.5 h / 0 °C
2.2: ammonium hydroxide / tetrahydrofuran; H2O / 16 h / 20 °C
View Scheme
levetiracetam
102767-28-2

levetiracetam

(2S)-2-(2-oxo-1-pyrrolidinyl)butanenitrile
664304-29-4

(2S)-2-(2-oxo-1-pyrrolidinyl)butanenitrile

Conditions
ConditionsYield
With pyridine; p-toluenesulfonyl chloride In dichloromethane at 20℃; for 20h;93%
oxalyl dichloride
79-37-8

oxalyl dichloride

(Z)-4-hydroxybut-2-enyl 1-(nitrooxy)ethyl carbonate
1345092-28-5

(Z)-4-hydroxybut-2-enyl 1-(nitrooxy)ethyl carbonate

levetiracetam
102767-28-2

levetiracetam

(Z)-4-((1-(nitrooxy)ethoxy)carbonyloxy)but-2-enyl (S)-2-(2-oxopyrrolidin-1-yl)butanoylcarbamate
1345092-06-9

(Z)-4-((1-(nitrooxy)ethoxy)carbonyloxy)but-2-enyl (S)-2-(2-oxopyrrolidin-1-yl)butanoylcarbamate

Conditions
ConditionsYield
Stage #1: oxalyl dichloride; levetiracetam In 1,1-dichloroethane; dichloromethane for 8h; Reflux;
Stage #2: (Z)-4-hydroxybut-2-enyl 1-(nitrooxy)ethyl carbonate In 1,1-dichloroethane; dichloromethane at 20℃; for 12h;
30.6%
Hexanoyl chloride
142-61-0

Hexanoyl chloride

levetiracetam
102767-28-2

levetiracetam

(S)-N-(2-(2-oxopyrrolidin-1-yl)butanoyl)hexanamide

(S)-N-(2-(2-oxopyrrolidin-1-yl)butanoyl)hexanamide

Conditions
ConditionsYield
Stage #1: levetiracetam With sodium hydride In tetrahydrofuran; mineral oil at 0 - 20℃; for 0.5h;
Stage #2: Hexanoyl chloride In tetrahydrofuran; mineral oil at 0 - 20℃; for 16h;
21%
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