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Hangzhou Huarong Pharm Co., Ltd.

USDMF EDMF are all available! 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 re

Brivaracetam USDMF EDMF

Cas:357336-20-0

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

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Shandong Mopai Biotechnology Co., LTD

Shandong Mopai Biotechnology 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 chemicals. W

brivaracetam

Cas:357336-20-0

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

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Hangzhou Hysen Pharma co.,Ltd.

Hangzhou Hysen pharma CO.,LTD. is a professional Pharmaceutical company. We are specialized in manufacturing and R&D of API & Intermediates, Contract Manufacturing, Contract Research, and International Trading business as well. *We own a

Brivaracetam factory

Cas:357336-20-0

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

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Dayang Chem (Hangzhou) Co.,Ltd.

As a leading manufacturer and supplier of chemicals in China, DayangChem not only supply popular chemicals, but also DayangChem’s R&D center offer custom synthesis according to the contract research and development services for the fine c

Brivaracetam in stock

Cas:357336-20-0

Min.Order:1 Kilogram

FOB Price: $6.0

Type:Lab/Research institutions

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Sinoway Industrial Co., Ltd.

Why is SINOWAY: 1) Specialized in pharmaceutical and healthcare industrial for 34 years. 2) ISO 9001:2015 & SGS audited supplier . 3) Accept various payment terms : T.T 30-60 days. 4) We have warehouse in USA with quickly shipment . 5) We c

factory supply 99% Brivarac-Etam powder

Cas:357336-20-0

Min.Order:1 Kilogram

FOB Price: $15.0 / 30.0

Type:Trading Company

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Wuhan Fortuna Chemical Co.,Ltd

Product Name: Brivaracetam Synonyms:(alphaS,4R)-alpha-Ethyl-2-oxo-4-propyl-1-pyrrolidineacetamide;UCB-34714;1-PyrrolidineacetaMide, α-ethyl-2-oxo-4-propyl-, (αS,4R)-;(S)-2-((R)-2-oxo-4-propylpyrrolidin-1-yl)butanaMide;2(S)-[2-Oxo-4(R)-

ISO&BV Factory Supply Brivaracetam 357336-20-0

Cas:357336-20-0

Min.Order:25 Gram

FOB Price: $15.0 / 23.0

Type:Trading Company

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Hangzhou Think Chemical Co. Ltd

Brivaracetam[CAS:357336-20-0] 5-hydroxy-4-propylfuran-2(5H)-one[CAS:78920-10-2] L-2-Aminobutanamide hydrochloride[CAS:7682-20-4] (R)-4-propyl-dihydro-furan-2-one[CAS:63095-51-2] Chemical Name: 2(S)-[2-Oxo-4(R)-propylpyrrolidin-1-yl]b

Supply Brivaracetam with good quality

Cas:357336-20-0

Min.Order:50 Gram

Negotiable

Type:Other

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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 Brivaracetam

Cas:357336-20-0

Min.Order:1 Kilogram

FOB Price: $1.0

Type:Manufacturers

inquiry

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

Brivaracetam

Cas:357336-20-0

Min.Order:1 Metric Ton

Negotiable

Type:Manufacturers

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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

Brivaracetam

Cas:357336-20-0

Min.Order:5 Kiloliter

FOB Price: $1.2 / 5.0

Type:Manufacturers

inquiry

LIDE PHARMACEUTICALS LIMITED

Advantage : LIDE PHARMACEUTICALS LTD. is a mid-small manufacturing-type enterprise, engaged in pharmaceutical intermediates of R&D, custom-made and production, and also involving trading chemicals for export. We have established the R&amp

brivaracetam / LIDE PHARMA- Factory supply / Best price

Cas:357336-20-0

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

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

TIANFU CHEM---brivaracetam

Cas:357336-20-0

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Hebei Nengqian Chemical Import and Export Co., LTD

With our good experience, we offer detailed technical support and advice to assist customers. We communicate closely with customers to establish their quality requirements. Consistent Quality Our plant has strict quality control in each manufacturin

Brivaraceta CAS 357336-20-0

Cas:357336-20-0

Min.Order:1 Gram

FOB Price: $6.0 / 9.0

Type:Trading Company

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 357336-20-0 with best quality

Cas:357336-20-0

Min.Order:1 Kilogram

FOB Price: $139.0 / 210.0

Type:Trading Company

inquiry

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

Supply and sell Pharmaceutical Raw Materials Brivaracetam for Anti-Epilepsy CAS 357336-20-0

Cas:357336-20-0

Min.Order:10 Kilogram

Negotiable

Type:Trading Company

inquiry

Henan Sinotech Import&Export Corporation

Name: 2(S)-[2-Oxo-4(R)-propylpyrrolidin-1-yl]butyramide CAS:357336-20-0 MF: C11H20N2O2 Appearance:White Powder Storage:Store in cool and dry place, away from sun light. Package:25kg Application:APIS Transportation:By sea or by air Port:Qingdao Port

2(S)-[2-Oxo-4(R)-propylpyrrolidin-1-yl]butyramide CAS:357336-20-0

Cas:357336-20-0

Min.Order:1 Kilogram

FOB Price: $1.0

Type:Other

inquiry

Hangzhou Sartort Biopharma Co., Ltd

Appearance:White or off- white powder Storage:ln stock Package:25kg/Barrel Application:Brain Enhancing Drug Transportation:Express/Sea/Air Port:Any port in china

Brivaracetam

Cas:357336-20-0

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

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

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

1-Pyrrolidineacetamide,a-ethyl-2-oxo-4-propyl-, (aS,4R)- 357336-20-0

Cas:357336-20-0

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

HANWAYS CHEMPHARM CO.,LIMITED

Wuhan hanweishi Pharmchem Co., Ltd(Hanways chempharm) is a specialized company concentrating on the R&D, production, marketing and technical service of APIs and pharmaceutical intermediates. The leading products range are APIs, Hormones, Peptides

Ucb 34714 CAS 357336-20-0

Cas:357336-20-0

Min.Order:100 Kilogram

FOB Price: $1.0 / 5.0

Type:Trading Company

inquiry

Shanghai Minstar Chemical Co., Ltd

Product Name: brivaracetam Synonyms: (alphaS,4R)-alpha-Ethyl-2-oxo-4-propyl-1-pyrrolidineacetamide;UCB-34714;1-PyrrolidineacetaMide, α-ethyl-2-oxo-4-propyl-, (αS,4R)-;(S)-2-((R)-2-oxo-4-propylpyrrolidin-1-yl)butanaMide;2(S)-[2-Oxo-4

brivaracetam

Cas:357336-20-0

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Hangzhou JINLAN Pharm-Drugs Technology Co., Ltd

We can provide GMP validation service that complies with SFDA, FDA, WHO and EU EMPA.Excellent registration team could help us easlily to register our products in different countries.If you and your customer are interested in some products or need C

Brivaracetam manufacturer with low price

Cas:357336-20-0

Min.Order:1 Gram

Negotiable

Type:Trading Company

inquiry

Qingdao Beluga Import and Export Co., LTD

Beluga chemical professional supply Brivaracetam manufacturer of high quality 1. Beluga Chemical has a professional RESEARCH and development team and strong technical force to ensure technical support and research capabilities. 2. Made in China a

Brivaracetam manufacturer of high quality

Cas:357336-20-0

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

1-Pyrrolidineacetamide,a-ethyl-2-oxo-4-propyl-, (aS,4R)-

Cas:357336-20-0

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Hebei Quanhe Biotechnology Co. LTD

1. Timely and efficient service to ensure communication with customers 2. Produce products of different specifications and sizes according to your requirements. 3. Quality procedures and standards recognized by SGS. Advanced plant equipment ensures s

brivaracetam

Cas:357336-20-0

Min.Order:1 Kilogram

FOB Price: $80.0 / 100.0

Type:Lab/Research institutions

inquiry

Triumph International Development Limilted

Triumph has the complete production of G- KG - MT service chain,we can make the new technology into productivity quickly in the research and development of new products. Main Service 1.Own made fine chemical products 2.Out sourcing and qua

Sell Brivaracetam 357336-20-0

Cas:357336-20-0

Min.Order:0 Metric Ton

Negotiable

Type:Lab/Research institutions

inquiry

Taizhou Crene Biotechnology co.ltd

Our company provides one-stop services of research - development - production for a variety of special prouducts. Not only do we make effective use of our strong technological strength, but also establish of cooperative relations with several well-

UCB-34714 Brivaracetam 357336-20-0

Cas:357336-20-0

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Hubei Yuanmeng Biological Technology Co., Ltd.

Hubei Yuanmeng Biological Technology Co., Ltd., which is located in Wuhan, China. We are specializing in the exportation of APIs, and plant extracts ect. Our products has been exported to America, Australia, Brazil, the Europe, Middle East and other

Factory Supply 99% Brivaracetam CAS 357336-20-0 with Best Price

Cas:357336-20-0

Min.Order:1 Kilogram

FOB Price: $3.0 / 7.0

Type:Trading Company

inquiry

Hefei Zhaobo Technology Co., Ltd.

Brivaracetam CAS 357336-20-0 Purity: 99% Min Application: Intermediates Appearance: Powder Package: Bag Delivery: 3-5days Our Advantage & Service 1.Top quality: Using high quality material and establishing a strict quality control sy

Brivaracetam CAS 357336-20-0

Cas:357336-20-0

Min.Order:1 Kilogram

FOB Price: $10.0 / 50.0

Type:Trading Company

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

BRIVARACETAM

Cas:357336-20-0

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Synthetic route

(2S)-4,5-dehydro-(2-oxo-4-n-propyl-1-pyrrolidinyl)-2-butanamide
357338-13-7

(2S)-4,5-dehydro-(2-oxo-4-n-propyl-1-pyrrolidinyl)-2-butanamide

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With (R)-((4,4’-bi-1,3-benzodioxole)-5,5’-diyl)bis(bis(3,5-di-t-butyl-4-methoxyphenyl))phosphine; copper(l) chloride; sodium t-butanolate In toluene at -40℃; for 24h; Inert atmosphere;99.3%
With 5% Pd-CaCO3; hydrogen In methanol; water at -10 - 0℃; Temperature; Reagent/catalyst; Solvent;70.2%
(R)-N-((S)-1-amino-1-oxobutan-2-yl)-3-(chloromethyl)hexanamide

(R)-N-((S)-1-amino-1-oxobutan-2-yl)-3-(chloromethyl)hexanamide

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With potassium tert-butylate In tetrahydrofuran93%
With sodium hydroxide In dichloromethane at -15 - -10℃; Concentration; Reagent/catalyst; Temperature; Solvent;90%
With lithium hexamethyldisilazane In tetrahydrofuran at -15 - -5℃; for 4h;69.8%
ethyl (R)-γ-bromo-3-propylbutyrate

ethyl (R)-γ-bromo-3-propylbutyrate

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

(S)-2-amino-butanamide hydrochloride

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With sodium carbonate In ethanol at 50℃; for 24h; Temperature;93%
C7H13IO2

C7H13IO2

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
Stage #1: C7H13IO2 With 1,1'-carbonyldiimidazole In toluene at 10 - 20℃; for 0.166667h; Inert atmosphere;
Stage #2: (S)-2-amino-butanamide In toluene at 10 - 20℃;
92%
ethyl (R)-γ-bromo-3-propylbutyrate

ethyl (R)-γ-bromo-3-propylbutyrate

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With potassium carbonate In ethanol at 60℃; for 8h; Reagent/catalyst; Solvent; Temperature;91%
With tetra-(n-butyl)ammonium iodide; sodium carbonate In Isopropyl acetate at 88.8℃; for 28h; Inert atmosphere; Cooling;32%
Stage #1: (S)-2-amino-butanamide; ethyl (R)-γ-bromo-3-propylbutyrate With tetra-(n-butyl)ammonium iodide; sodium carbonate In Isopropyl acetate for 28h; Reflux;
Stage #2: With acetic acid In Isopropyl acetate at 60℃; for 1.83h;
12.66%
(2S)-2-[(4R)-2-oxo-4-n-propyl-1-pyrrolidinyl]butyric acid

(2S)-2-[(4R)-2-oxo-4-n-propyl-1-pyrrolidinyl]butyric acid

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With ammonium chloride; N-ethyl-N,N-diisopropylamine; HATU In tetrahydrofuran at 20℃; for 2h; Time; Large scale;90%
With ammonia; pivaloyl chloride; triethylamine In dichloromethane at 0 - 10℃; for 6h; Inert atmosphere;88%
Stage #1: (2S)-2-[(4R)-2-oxo-4-n-propyl-1-pyrrolidinyl]butyric acid With chloroformic acid ethyl ester; triethylamine In dichloromethane at -10 - -5℃; for 1h;
Stage #2: With ammonium bicarbonate In dichloromethane at -10 - -5℃;
67%
C11H22N2O3*C2H2O4

C11H22N2O3*C2H2O4

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
In isopropyl alcohol for 6h; Reflux;89.3%
isopropyl (2S)-2-[(4R)-2-oxo-4-propyl-1-pyrrolidinyl]butyrate

isopropyl (2S)-2-[(4R)-2-oxo-4-propyl-1-pyrrolidinyl]butyrate

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With ammonium hydroxide; ammonia In water at 5℃; under 750.075 - 1125.11 Torr; for 15h;88.7%
C7H12ClIO

C7H12ClIO

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With potassium hydroxide In dichloromethane at 0 - 5℃; for 2h; Molecular sieve;87%
methyl (2S)-2-[(4R)-2-oxo-4-propyl-1-pyrrolidinyl]butyrate

methyl (2S)-2-[(4R)-2-oxo-4-propyl-1-pyrrolidinyl]butyrate

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With ammonium hydroxide In N,N-dimethyl-formamide at 20℃; for 15h;86.4%
With ammonium hydroxide; ammonia In water at 5℃; under 750.075 - 1125.11 Torr; for 15h;34 g
With ammonia In tetrahydrofuran at 20℃; for 20h;0.91 g
(2S)-2-((3R)-2-hydroxy-5-oxo-3-propylpyrrolidin-1-yl)butanamide

(2S)-2-((3R)-2-hydroxy-5-oxo-3-propylpyrrolidin-1-yl)butanamide

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With triethylsilane; trifluoroacetic acid In dichloromethane at -25 - 20℃; for 4.51667h;81.3%
With triethylsilane; boron trifluoride diethyl etherate In dichloromethane at 0℃; for 18h;
(2S)-2-(4-propylpyrrolidin-2-one)butanamide

(2S)-2-(4-propylpyrrolidin-2-one)butanamide

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
In ethanol; n-heptane at 23 - 27℃; Product distribution / selectivity; Resolution of racemate;80%
In dichloromethane Resolution of racemate;
(R)-3-hydroxymethylhexanoic acid [(S)-1-carbamoylpropyl]amide

(R)-3-hydroxymethylhexanoic acid [(S)-1-carbamoylpropyl]amide

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With sulfuric acid In toluene at 90 - 100℃; for 15h; Solvent; Reagent/catalyst; Temperature; Green chemistry;77.95%
Multi-step reaction with 2 steps
1: thionyl chloride / tetrahydrofuran / 2 h / 0 - 20 °C
2: lithium hexamethyldisilazane / tetrahydrofuran / 4 h / -15 - -5 °C
View Scheme
With tributylphosphine; di-tert-butyl-diazodicarboxylate In tetrahydrofuran at 20℃; for 18h;
C14H24N2O4

C14H24N2O4

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With sodium chloride In water; N,N-dimethyl-formamide at 100℃; for 16h; Solvent; Temperature; Reagent/catalyst;75.47%
C7H12Br2O

C7H12Br2O

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
Stage #1: (S)-2-amino-butanamide; C7H12Br2O With tetrabutylammomium bromide; potassium hydroxide In dichloromethane at 0℃; for 10h;
Stage #2: In tert-butyl methyl ether at 20℃; for 22h; Reagent/catalyst; Temperature; Inert atmosphere;
75%
(3R)-3-(bromomethyl)-N-[(1S)-1-carbamoylpropyl]hexanamide

(3R)-3-(bromomethyl)-N-[(1S)-1-carbamoylpropyl]hexanamide

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With sodium hexamethyldisilazane In tetrahydrofuran at -10 - 10℃; for 1h; Reagent/catalyst; Temperature;75%
With potassium tert-butylate In tetrahydrofuran at -30℃;69.06%
C15H20N2O5S

C15H20N2O5S

n-propylmagnesium bromide
927-77-5

n-propylmagnesium bromide

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With potassium bromide In dichloromethane at 5℃; for 2.5h; Temperature; Reagent/catalyst; Inert atmosphere;74.8%
(+)-(R)-4-propyl-4,5-dihydrofuran-2(3H)-one
63095-51-2

(+)-(R)-4-propyl-4,5-dihydrofuran-2(3H)-one

(S)-2-aminobutanamide hydrochloride

(S)-2-aminobutanamide hydrochloride

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
Stage #1: (S)-2-aminobutyramide hydrochloride With sodium hydroxide In ethanol for 1h; Reflux; Green chemistry;
Stage #2: (+)-(R)-4-propyl-4,5-dihydrofuran-2(3H)-one In ethanol for 9h; Green chemistry;
Stage #3: With sulfuric acid In toluene at 95 - 100℃; for 15h; Green chemistry;
72.93%
(2S)-2-(2-hydroxy-5-oxo-3-propyl-2,5-dihydro-1H-pyrrole-1-yl)butanamide

(2S)-2-(2-hydroxy-5-oxo-3-propyl-2,5-dihydro-1H-pyrrole-1-yl)butanamide

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With palladium 10% on activated carbon; hydrogen In isopropyl alcohol at -30 - -20℃;72.4%
(S)-2-aminobutanamide hydrochloride

(S)-2-aminobutanamide hydrochloride

C8H15BrO2

C8H15BrO2

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
Stage #1: (S)-2-aminobutyramide hydrochloride With potassium carbonate In Isopropyl acetate for 8h; Reflux;
Stage #2: C8H15BrO2 In Isopropyl acetate for 28h; Reflux;
68%
C7H12ClIO

C7H12ClIO

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

(S)-2-amino-butanamide hydrochloride

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With tetrabutylammomium bromide; sodium sulfate; potassium hydroxide In dichloromethane at 20 - 30℃; for 18h; Large scale;64%
With tetrabutylammomium bromide; sodium sulfate; potassium hydroxide In dichloromethane at 20 - 30℃; for 18h; Molecular sieve;543.5 g
With tetrabutylammomium bromide; sodium sulfate; potassium hydroxide In dichloromethane at 20 - 30℃; for 18h; Molecular sieve; Large scale;543.5 g
C10H15BrN2O

C10H15BrN2O

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With sodium hydroxide In acetonitrile at 0 - 25℃; for 12h; Solvent; Reagent/catalyst; Temperature;64%
(S)-2-aminobutanamide hydrochloride

(S)-2-aminobutanamide hydrochloride

C7H13IO2

C7H13IO2

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
Stage #1: (S)-2-aminobutyramide hydrochloride With potassium carbonate In Isopropyl acetate for 8h; Reflux;
Stage #2: C7H13IO2 In Isopropyl acetate for 28h; Reflux;
63.4%
(+)-(R)-4-propyl-4,5-dihydrofuran-2(3H)-one
63095-51-2

(+)-(R)-4-propyl-4,5-dihydrofuran-2(3H)-one

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With toluene-4-sulfonic acid In toluene for 24h; Reflux; enantioselective reaction;60%
With sodium sulfate; potassium hydroxide at 160℃; for 18h; Temperature; Molecular sieve; Inert atmosphere;60%
Stage #1: (+)-(R)-4-propyl-4,5-dihydrofuran-2(3H)-one; (S)-2-amino-butanamide In toluene at 20℃; for 2h; Inert atmosphere;
Stage #2: With sodium tetrahydroborate; sodium hydroxide In water; toluene for 1h;
Stage #3: With acetic acid In water; toluene at 50℃; for 20h;
C7H12BrClO

C7H12BrClO

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With tetrabutylammomium bromide; lithium isopropylamide; sodium sulfate In N,N-dimethyl-formamide at 10 - 20℃; for 10h; Large scale;59%
C13H26N2O3

C13H26N2O3

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With 2-hydroxypyridin In toluene at 90℃; for 3h; Reagent/catalyst;58%
With acetic acid In tetrahydrofuran at 25 - 65℃; for 4h;28 g
(2S)-2-((4S)-2-oxo-4-propyl-3-tosylpyrrolidin-1-yl)butanamide

(2S)-2-((4S)-2-oxo-4-propyl-3-tosylpyrrolidin-1-yl)butanamide

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With methanol; chloro-trimethyl-silane; magnesium at 20℃; for 24h; Reagent/catalyst; Temperature;47.6%
C11H20N2O2

C11H20N2O2

A

((2R)-2-[(4R)-2-oxo-4-propyltetrahydro-1H-pyrrol-1-yl]butanamide)
357337-00-9

((2R)-2-[(4R)-2-oxo-4-propyltetrahydro-1H-pyrrol-1-yl]butanamide)

B

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
Purification / work up; Resolution of diastereomeric mixture;A 45%
B 44%
2-(2-oxo-4-propylpyrrolidin-1-yl)butanamide
357335-87-6

2-(2-oxo-4-propylpyrrolidin-1-yl)butanamide

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With Chiralpak AD In ethanol; n-heptane Resolution of racemate;44%
tert-butyl (3R)-3-({[(2S)-1-amino-1-oxobutan-2-yl]amino}methyl)hexanoate

tert-butyl (3R)-3-({[(2S)-1-amino-1-oxobutan-2-yl]amino}methyl)hexanoate

brivaracetam
357336-20-0

brivaracetam

Conditions
ConditionsYield
With benzotriazol-1-ol In toluene at 90℃; for 3h;40%
With acetic acid In toluene at 80 - 85℃; for 14h; Reagent/catalyst; Temperature; Solvent;0.3 g
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