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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

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

Henan Allgreen Chemical Co.,Ltd

high quality Appearance:White or off white powder Storage:Sealed, dry, microtherm , avoid light and smell Package:According to the demand of customer Application:Pharmaceutical intermediates Transportation:by air or by sea Port:shanghai

(2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)acetic acid

Cas:62893-24-7

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

Enke Pharma-tech Co.,Ltd. (Cangzhou, China )

Cangzhou Enke Pharma Tech Co.,ltd. is located in Cangzhou City, Hebei province ,where is a famous petroleum chemical industry city in China. Enke Pharma a high-tech enterprise ,and we are dedicated to developing and manufacturing new ap

(2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)acetic acid

Cas:62893-24-7

Min.Order:1 Kilogram

FOB Price: $5.0

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

(R)-α-(4-Ethyl-2,3-dioxo-1-piperazinecarboxamide)-4-hydroxyphenylglycine

Cas:62893-24-7

Min.Order:5 Kiloliter

FOB Price: $1.2 / 5.0

Type:Manufacturers

inquiry

Hebei yanxi chemical co.,LTD.

chengdu and import and export trade 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 res

(R)-(-)-α-[[(4-Ethyl-2,3-dioxo-1-piperazinyl)carbonyl]amino]-4-hydrox...

Cas:62893-24-7

Min.Order:1000 Gram

FOB Price: $500.0

Type:Trading Company

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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.

(2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)acetic acid

Cas:62893-24-7

Min.Order:1 Kilogram

FOB Price: $0.9 / 1.0

Type:Lab/Research institutions

inquiry

Jinan Finer Chemical Co., Ltd

Product Description Product name (2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)acetic acid CAS 62893-24-7 Assay

(2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)acetic acid

Cas:62893-24-7

Min.Order:1 Kilogram

Negotiable

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

(2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)acetic acid

Cas:62893-24-7

Min.Order:1 Kilogram

FOB Price: $9.0 / 99.0

Type:Trading Company

inquiry

Henan Tianfu Chemical Co., Ltd.

TIANFUCHEM--62893-24-7--High purity (2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)acetic acid factory price Our company was built in 2009 with an ISO certificate.In the past 10 years, we have grown up as a famous fi

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 62893-24-7 with best quality

Cas:62893-24-7

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

(2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)acetic acid

Cas:62893-24-7

Min.Order:10 Kilogram

FOB Price: $80.0 / 100.0

Type:Trading Company

inquiry

Henan Sinotech Import&Export Corporation

Product name: D(-)-α-[[(4-Ethyl-2,3-dioxo-1-piperazinyl)carbonyl]amino]-2-phenyl acetic acid EPCPHO-EPCP(HO-EPCP) CAS No.: 62893-24-7 Molecular weight: 335.32 Useing: Intermediate of Anti-infectiv

D-(-)-α-[[(4-Ethyl-2,3-dioxo-1-piperazinyl)carbonyl]amino]-4-hydroxybenzeneacet

Cas:62893-24-7

Min.Order:1 Kilogram

FOB Price: $1.0

Type:Other

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

(2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)acetic acid 62893-24-7

Cas:62893-24-7

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Qingdao Beluga Import and Export Co., LTD

(2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)acetic acid CAS:62893-24-7 Qingdao Belugas Import and Export Co., Ltd. is a scientific and technological company integrating research and development, production and trade of c

(2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)acetic acid CAS:62893-24-7

Cas:62893-24-7

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

(2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)acetic acid

Cas:62893-24-7

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Changchun Artel lmport and Export trade company

Product Detail Minimum Order Qty. 10 Gram

(R)-(-)-α-[[(4-Ethyl-2,3-dioxo-1-piperazinyl)carbonyl]amino]-4-hydrox... CAS NO.62893-24-7

Cas:62893-24-7

Min.Order:10 Gram

Negotiable

Type:Trading Company

inquiry

Henan Wentao Chemical Product Co., Ltd.

Henan Wentao Chemical Product Co.,Ltd is Located in Zhengzhou High-tech Development Zone with import and export license, We passed ISO 9001:2008 as well, Henan Wentao has developed more than 1000 compounds, which are widely used in the fields of prod

(2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)acetic acid

Cas:62893-24-7

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Xiamen Hisunny Chemical Co.,Ltd

Best quality & Attractive price & Professional service; Trial & Pilot & Commercial Hisunny Chemical is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality intermediates, specia

Triumph International Development Limilted

Main Service 1.Own made fine chemical products 2.Out sourcing and quality controlling service in China 3. COM for Chemical synthesis 4.Lab custom synthesis of API and intermadiates Quality Assurance 1. NMR,HPLC and COA can be suppli

(2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)acetic acid

Cas:62893-24-7

Min.Order:10 Gram

FOB Price: $1.0 / 10.0

Type:Lab/Research institutions

inquiry

Hangzhou Keyingchem Co.,Ltd

Hangzhou KeyingChem Co., Ltd. exported this product to many countries and regions at best price. If you are looking for the material’s manufacturer or supplier in China, KeyingChem is your best choice. Pls contact with us freely for getting det

(2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)acetic acid

Cas:62893-24-7

Min.Order:0 Metric Ton

Negotiable

Type:Lab/Research institutions

inquiry

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

(R)-(-)-a-(((4-Ethyl-2,3-dioxo-1-piperazin-yl)carbonyl)nh)-4-oh-benzene acetic acid

Cas:62893-24-7

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Saiwante (shanghai) New Material Technology Co., Ltd.

Appearance/Colour: white crystalline powder Melting Point: 205 °C (dec.)(lit.) Refractive Index: 1.5600 (estimate) Boiling Point: 471.96°C (rough estimate) PKA: 3.40±0.10(Predicted) PSA: 127.25000 Density: 1.456 g/cm3 LogP: 0.18

62893-24-7 99% (2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)acetic acid

Cas:62893-24-7

Min.Order:1 Gram

FOB Price: $3.0 / 5.0

Type:Trading Company

inquiry

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

High quality (D-)-Alpha-[[(4-Ethyl-2,3-Dioxo-1-Piperazinyl) Carbonyl]Amino]-2-(4-Hydroxyphenyl) Acetic Acid

Cas:62893-24-7

Min.Order:10 Gram

FOB Price: $100.0

Type:Lab/Research institutions

inquiry

Hangzhou Lingrui Chemical Co.,Ltd.

(2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)acetic acidAppearance:White powder Storage:Store in well-closed container, protected from light and in cool & dry place. Package:according to customers' requirements Application:

SHANGHAI SYSTEAM BIOCHEM CO., LTD

We are one of a few suppliers that can offer custom synthesis service of this product We are specialized in custom synthesis, chemical/pharmaceutical/ pesticides outsourcing and contract research. We are committed to prov

(2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)acetic acid

Cas:62893-24-7

Min.Order:100 Gram

FOB Price: $100.0 / 2000.0

Type:Lab/Research institutions

inquiry

HANGZHOU YUNUO CHEMICAL CO.,LTD

Superior quality, moderate price & quick delivery. Appearance:white crystals Storage:Stored in cool, dry and ventilation place; Away from fire and heat Package:10g/bag,or as your request Application:For medicine , pesticide intermediates Tr

(2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)acetic acid

Cas:62893-24-7

Min.Order:1 Gram

Negotiable

Type:Trading Company

inquiry

Siwei Development Group Ltd.

Product name: D(-)-Alpha-[[(4-Ethyl-2,3-Dioxo-1-Piperazinyl)Carbonyl]amino]-2-Phentyl Acetic Acid CAS No.:62893-24-7 Molecule Formula:C15H16N3O6 Molecule Weight:334.30 Purity: 99.0% Package: 25kg/drum Description:White powder Manufact

High Quality D(-)-Alpha-[[(4-Ethyl-2,3-Dioxo-1-Piperazinyl)Carbonyl]amino]-2-Phentyl Acetic Acid

Cas:62893-24-7

Min.Order:1 Kilogram

Negotiable

Type:Trading Company

inquiry

Xiamen Jenny Chemical Technology Co., Ltd.

GMP standard, high purity, competitive price, in stock 1. Quick Response: within 6 hours after receiving your email. 2. Quality Guarantee: All products are strictly tested by our QC, confirmed by QA, and approved by a third-party lab in China, USA,

(2R)-2-[(4-Ethyl-2,3-dioxopiperazinyl)carbonylamino]-2-(4-hydroxyphenyl)aceticacid

Cas:62893-24-7

Min.Order:1 Milligram

Negotiable

Type:Trading Company

inquiry

Synthetic route

D-4-hydroxyphenylglycine
22818-40-2

D-4-hydroxyphenylglycine

4-ethyl-2,3-dioxopiperazine-1-carbonyl chloride
59703-00-3

4-ethyl-2,3-dioxopiperazine-1-carbonyl chloride

(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid
62893-24-7

(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid

Conditions
ConditionsYield
With sodium carbonate; zinc dibromide In water at 200℃; for 3h; Temperature; Reagent/catalyst; Autoclave;83.5%
(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid
62893-24-7

(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid

D-(-)-2-[(4-ethyl-2,3-dioxo-1-piperazinyl)amido]- 2-(4-hydroxyphenyl)acetic acid chloride
74769-12-3

D-(-)-2-[(4-ethyl-2,3-dioxo-1-piperazinyl)amido]- 2-(4-hydroxyphenyl)acetic acid chloride

Conditions
ConditionsYield
With bis(trichloromethyl) carbonate; triethylamine In dichloromethane at 0℃; for 3h;97.6%
With chloro-trimethyl-silane; trichlorophosphate In N,N-dimethyl acetamide; acetonitrile at -20℃;
C13H20N6O3S2Si*ClH

C13H20N6O3S2Si*ClH

(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid
62893-24-7

(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid

Conditions
ConditionsYield
With benzotriazol-1-yl diethyl phosphate; triethylamine In N,N-dimethyl-formamide at 28℃; for 2h;76.2%
bis(trimethylsilyl)aminomethaneboronate

bis(trimethylsilyl)aminomethaneboronate

(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid
62893-24-7

(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid

C23H37BN4O7Si

C23H37BN4O7Si

Conditions
ConditionsYield
Stage #1: (R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid With triethylamine; isobutyl chloroformate In tetrahydrofuran at 0℃; for 1h; Inert atmosphere;
Stage #2: bis(trimethylsilyl)aminomethaneboronate In tetrahydrofuran at 0 - 20℃; Inert atmosphere;
54%
(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid
62893-24-7

(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid

(6R)-trans-3-chloromethyl-7-amino-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate, diphenylmethyl ester

(6R)-trans-3-chloromethyl-7-amino-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate, diphenylmethyl ester

(6R,7R)-3-Chloromethyl-7-[(R)-2-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-2-(4-hydroxy-phenyl)-acetylamino]-8-oxo-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid benzhydryl ester
153715-66-3

(6R,7R)-3-Chloromethyl-7-[(R)-2-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-2-(4-hydroxy-phenyl)-acetylamino]-8-oxo-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid benzhydryl ester

Conditions
ConditionsYield
With benzotriazol-1-ol; dicyclohexyl-carbodiimide In dichloromethane
(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid
62893-24-7

(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid

<6R-<6α,7β(R)>>-3-<<4-(carboxy-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-7-quinolinyl)-1-piperazinyl>methyl>-7-<<<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetyl>amino>-8-oxo-5-thia-1-azabicyclo<4.2.0>oct-2-ene-2-carboxylic ...

<6R-<6α,7β(R)>>-3-<<4-(carboxy-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-7-quinolinyl)-1-piperazinyl>methyl>-7-<<<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetyl>amino>-8-oxo-5-thia-1-azabicyclo<4.2.0>oct-2-ene-2-carboxylic ...

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: 1-hydroxybenzotriazole, 1,3-dicyclohexylcarbodiimide / CH2Cl2
2: NaI / butan-2-one / 2 h / Ambient temperature
3: NaHCO3 / dimethylformamide / 3 h
4: anisole / CH2Cl2 / 0.25 h / 0 °C
View Scheme
(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid
62893-24-7

(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid

(6R,7R)-7-[(R)-2-[(4-Ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-2-(4-hydroxy-phenyl)-acetylamino]-3-iodomethyl-8-oxo-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid benzhydryl ester
153715-68-5

(6R,7R)-7-[(R)-2-[(4-Ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-2-(4-hydroxy-phenyl)-acetylamino]-3-iodomethyl-8-oxo-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid benzhydryl ester

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 1-hydroxybenzotriazole, 1,3-dicyclohexylcarbodiimide / CH2Cl2
2: NaI / butan-2-one / 2 h / Ambient temperature
View Scheme
(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid
62893-24-7

(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid

C53H51FN8O11S
153715-70-9

C53H51FN8O11S

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: 1-hydroxybenzotriazole, 1,3-dicyclohexylcarbodiimide / CH2Cl2
2: NaI / butan-2-one / 2 h / Ambient temperature
3: NaHCO3 / dimethylformamide / 3 h
View Scheme
(6R-trans)-7-amino-3-chloromethyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid diphenylmethyl ester

(6R-trans)-7-amino-3-chloromethyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid diphenylmethyl ester

(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid
62893-24-7

(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid

[6R-[6α,7β(R)]]-3-[[4-(3-Carboxy-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-7-quinolinyl)-1-piperazinyl]methyl]-7-[[[[(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl]amino](4-hydroxyphenyl)-acetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid

[6R-[6α,7β(R)]]-3-[[4-(3-Carboxy-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-7-quinolinyl)-1-piperazinyl]methyl]-7-[[[[(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl]amino](4-hydroxyphenyl)-acetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid

C23H34BNO4

C23H34BNO4

(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid
62893-24-7

(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid

(+)-pinanediol (1R)-2-[3-(tert-butoxycarbonyl)phenyl]-1-{(αR)-α-[(4-ethyl-2,3-dioxo-1-piperazinyl)carbonylamino]-4-hydroxybenzenacetylamino}ethaneboronate
1421842-15-0

(+)-pinanediol (1R)-2-[3-(tert-butoxycarbonyl)phenyl]-1-{(αR)-α-[(4-ethyl-2,3-dioxo-1-piperazinyl)carbonylamino]-4-hydroxybenzenacetylamino}ethaneboronate

Conditions
ConditionsYield
Stage #1: (R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid With isobutyl chloroformate In tetrahydrofuran at -35 - -10℃; for 0.166667h; Inert atmosphere;
Stage #2: With 4-methyl-morpholine In tetrahydrofuran at -10℃; for 1h; Inert atmosphere;
Stage #3: C23H34BNO4 In tetrahydrofuran at -10 - 20℃; Inert atmosphere;
(6R,7R)-7-amino-3-[(1H-1-methyltetrazol-5-yl)thio]methylceph-3-em-4-carboxylic acid
24209-38-9

(6R,7R)-7-amino-3-[(1H-1-methyltetrazol-5-yl)thio]methylceph-3-em-4-carboxylic acid

(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid
62893-24-7

(R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid

Conditions
ConditionsYield
Stage #1: (6R,7R)-7-amino-3-[(1H-1-methyltetrazol-5-yl)thio]methylceph-3-em-4-carboxylic acid With chloro-trimethyl-silane; 1,1,1,3,3,3-hexamethyl-disilazane In dichloromethane at 45℃; for 4h;
Stage #2: (R)-<<(4-ethyl-2,3-dioxo-1-piperazinyl)carbonyl>amino>(4-hydroxyphenyl)acetic acid With pyridine; chloroformic acid ethyl ester; triethylamine In dichloromethane; N,N-dimethyl acetamide at -45 - -40℃; for 4h;

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