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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

4-Ethyl-2,3-dioxo-1-piperazine carbonyl chloride Manufacturer/High quality/Best price/In stock

Cas:59703-00-3

Min.Order:1 Kilogram

FOB Price: $3.0

Type:Lab/Research institutions

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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 4-Ethyl-2,3-Dioxo-1-Piperazine Carbonyl Chloride supplier in China

Cas:59703-00-3

Min.Order:0 Metric Ton

Negotiable

Type:Manufacturers

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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

4-Ethyl-2,3-dioxo-1-piperazine carbonyl chloride

Cas:59703-00-3

Min.Order:1 Kilogram

Negotiable

Type:Manufacturers

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

Cas:59703-00-3

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% 59703-00-3 4-Ethyl-2,3-dioxo-1-piperazine carbonyl chloride Manufacturer

Cas:59703-00-3

Min.Order:1 Gram

FOB Price: $0.1

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

4-Ethyl-2,3-dioxo-1-piperazinecarbonyl chloride

Cas:59703-00-3

Min.Order:5 Kiloliter

FOB Price: $1.2 / 5.0

Type:Manufacturers

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Henan Tianfu Chemical Co., Ltd.

4-Ethyl-2,3-dioxo-1-piperazine carbonyl chloride Basic information Product Name: 4-Ethyl-2,3-dioxo-1-piperazine carbonyl chloride Synonyms: edpc;1-CHLOROCARBONYL-4-ETHYL-2,3-DIOXOPIPERAZ

1-Piperazinecarbonylchloride, 4-ethyl-2,3-dioxo- 59703-00-3

Cas:59703-00-3

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

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Jinan Finer Chemical Co., Ltd

Product Description Product name 4-Ethyl-2,3-dioxo-1-piperazine carbonyl chloride CAS 59703-00-3 Assay 99% Appearanc

4-Ethyl-2,3-dioxo-1-piperazine carbonyl chloride

Cas:59703-00-3

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

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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

4-Ethyl-2,3-dioxo-1-piperazine carbonyl chloride

Cas:59703-00-3

Min.Order:1 Kilogram

FOB Price: $9.0 / 99.0

Type:Trading Company

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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

New production CAS 59703-00-3 with best quality

Cas:59703-00-3

Min.Order:1 Kilogram

FOB Price: $139.0 / 210.0

Type:Trading Company

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Henan Sinotech Import&Export Corporation

Product name: 4-Ethyl-2,3-dioxo-piperazine carbonyl chloride(EDPC) CAS No.: 59703-00-3 Molecular weight: 204.61 Useing: Intermediate of Anti-infectives Appearance: white powder Storage:Store in co

4-Ethyl-2,3-dioxo-piperazine carbonyl chloride

Cas:59703-00-3

Min.Order:1 Kilogram

FOB Price: $1.0

Type:Other

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Hubei Langyou International Trading 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 off-white powder Storage:Store in sealed containers

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-Piperazinecarbonylchloride, 4-ethyl-2,3-dioxo- 59703-00-3

Cas:59703-00-3

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

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Qingdao Beluga Import and Export Co., LTD

4-Ethyl-2,3-dioxo-1-piperazine carbonyl chloride CAS:59703-00-3 Qingdao Belugas Import and Export Co., Ltd. is a scientific and technological company integrating research and development, production and trade of chemical intermediates, specializing

4-Ethyl-2,3-dioxo-1-piperazine carbonyl chloride CAS:59703-00-3

Cas:59703-00-3

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-Piperazinecarbonylchloride, 4-ethyl-2,3-dioxo-

Cas:59703-00-3

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

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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

1-Piperazinecarbonylchloride, 4-ethyl-2,3-dioxo-

Cas:59703-00-3

Min.Order:0

Negotiable

Type:Lab/Research institutions

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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

4-Ethyl-2,3-Dioxo-1-Piperazinecarbonyl Chloride

Cas:59703-00-3

Min.Order:0

Negotiable

Type:Manufacturers

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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 have s

4-Ethyl-2,3-dioxo-1-piperazine carbonyl chloride

Cas:59703-00-3

Min.Order:10 Kilogram

Negotiable

Type:Trading Company

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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

4-Ethyl-2,3-dioxo-1-piperazine carbonyl chloride

Cas:59703-00-3

Min.Order:0 Metric Ton

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

4-Ethyl-2,3-dioxo-1-piperazine carbonyl chloride

Cas:59703-00-3

Min.Order:0

Negotiable

Type:Lab/Research institutions

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SHANGHAI T&W PHARMACEUTICAL CO., LTD.

A substitute for perfluorooctanoic acid, mainly used as a surfactant, dispersant, additive, etc Appearance:White solid or Colorless liquid Purity:99.3 % We will ship the goods in a timely manner as required We can provide relevant documents acc

4-Ethyl-2,3-dioxo-1-piperazine carbonyl chloride

Cas:59703-00-3

Min.Order:4 Kilogram

Negotiable

Type:Lab/Research institutions

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

Hangzhou Lingrui Chemical Co.,Ltd.

4-Ethyl-2,3-Dioxo-1-Piperazine Carbonyl ChlorideAppearance:detailed see specifications Storage:stored in cool and dry places Package:according to customers' requirements Application:pharm intermeditae Transportation:By air(EMS or EUB or FedEx or TNT

4-Ethyl-2,3-Dioxo-1-Piperazine Carbonyl Chloride

Cas:59703-00-3

Min.Order:1 Gram

Negotiable

Type:Other

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TaiChem Taizhou Limited

Established in May 2015, TaiChem Ltd. is initially invested by a British research and development company and started by PhDs back from aboard. The company is registered in China Medical City (CMC), Taizhou, Jiangsu Province, and the production site

4-Ethyl-2,3-dioxo-1-piperazine carbonyl chloride

Cas:59703-00-3

Min.Order:10 Gram

Negotiable

Type:Lab/Research institutions

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Siwei Development Group Ltd.

Product name: 4-Ethyl-2,3-Dioxo-1-Piperazine Carbonyl Chloride CAS No.:59703-00-3 Molecule Formula:C7H9ClN2O3 Molecule Weight:204.61 Purity: 97.0% Package: 25kg/drum Description:White or off-white crystalline powder Manufacture Standa

High Quality 4-Ethyl-2,3-Dioxo-1-Piperazine Carbonyl Chloride

Cas:59703-00-3

Min.Order:1 Kilogram

Negotiable

Type:Trading Company

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Zibo Dorne chemical technology co. LTD

Product Details Grade: pharmaceutical grade Purity:99%+ ProductionCapacity: 1000 Kilogram/Month Scope of use: For scientific research only(The product must be used legally) Our Advantage 1. Best quality with competitive price. 2. Quick shipping,

4-Ethyl-2,3-dioxo-1-piperazine carbonyl chloride

Cas:59703-00-3

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

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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,

4-Ethyl-2,3-dioxo-1-piperazinecarbonylchloride

Cas:59703-00-3

Min.Order:1 Milligram

Negotiable

Type:Trading Company

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Shanghai Minstar Chemical Co., Ltd

4-Ethyl-2,3-dioxo-1-piperazine carbonyl chloride Basic information Product Name: 4-Ethyl-2,3-dioxo-1-piperazine carbonyl chloride Synonyms: 4-Ethyl-2,3-dioxopiperazine-1-carboxylic acid chloride;DEPC 4-Ethyl-2,3-dioxo-1-piperazinecarbonylchlor

4-Ethyl-2,3-dioxo-1-piperazine carbonyl chloride

Cas:59703-00-3

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

EAST CHEMSOURCES LIMITED

factory?direct?saleAppearance:White Powder Storage:Store In Dry, Cool And Ventilated Place Package:25kg/drum, also according to the clients requirement Application:It is widely used as a thickener, emulsifier and stabilizer Transportation:By Sea Or B

4-Ethyl-2,3-dioxo-1-piperazine carbonyl chloride

Cas:59703-00-3

Min.Order:1 Kilogram

FOB Price: $18.0 / 20.0

Type:Trading Company

inquiry

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

4-Ethyl-2,3-dioxo-1-piperazine carbonyl chloride

Cas:59703-00-3

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Synthetic route

bis(trichloromethyl) carbonate
32315-10-9

bis(trichloromethyl) carbonate

1-ethyl-2,3-dioxo-piperazine
59702-31-7

1-ethyl-2,3-dioxo-piperazine

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

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

Conditions
ConditionsYield
With pyridine; dmap; chloro-trimethyl-silane In dichloromethane at -25 - -20℃;94.3%
With 1,8-diazabicyclo[5.4.0]undec-7-ene In dichloromethane at 10 - 20℃; for 1.06667h; Temperature; Reagent/catalyst; Green chemistry;93.9%
Stage #1: 1-ethyl-2,3-dioxo-piperazine With chloro-trimethyl-silane; triethylamine In dichloromethane at 0 - 20℃; for 1h; Inert atmosphere; Schlenk technique;
Stage #2: bis(trichloromethyl) carbonate In dichloromethane at -30℃; Inert atmosphere; Schlenk technique;
phosgene
75-44-5

phosgene

1-ethyl-2,3-dioxo-piperazine
59702-31-7

1-ethyl-2,3-dioxo-piperazine

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

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

Conditions
ConditionsYield
With chloro-trimethyl-silane; triethylamine In tetrahydrofuran; 1,4-dioxane
2-Mercaptobenzothiazole
149-30-4

2-Mercaptobenzothiazole

A

S-2-benzothiazolyl-4-ethyl-2,3-dioxo-1-piperazinethio-carboxylate
120600-74-0

S-2-benzothiazolyl-4-ethyl-2,3-dioxo-1-piperazinethio-carboxylate

B

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

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

Conditions
ConditionsYield
With triethylamine In dichloromethane
ampicillin
69-53-4

ampicillin

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

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

Conditions
ConditionsYield
With calcium carbonate In dichloromethane; water; ethyl acetate at 30 - 35℃; for 0.833333h;93.7%
With sodium acetate; 1,8-diazabicyclo[5.4.0]undec-7-ene In dichloromethane; water; ethyl acetate at 5 - 10℃; for 0.916667h; pH=6.5 - 7.5; Temperature; Reagent/catalyst; Green chemistry;92.8%
With triethylamine In water; ethyl acetate at 15 - 20℃; for 1h; pH=7.1;123.5 g
7β-<(2R)-2-phenyl-2-amino>acetylamino-1-carba-1-dethia-3-cephem-4-carboxylic acid
72292-40-1, 72345-50-7, 72377-68-5

7β-<(2R)-2-phenyl-2-amino>acetylamino-1-carba-1-dethia-3-cephem-4-carboxylic acid

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

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

7β-<(2R)-2-phenyl-2-(4-ethyl-2,3-dioxopiperazine-1-yl-carbonyl)amino>acetylamino-1-carba-1-dethia-3-cephem-4-carboxylic acid
72292-42-3, 72401-86-6

7β-<(2R)-2-phenyl-2-(4-ethyl-2,3-dioxopiperazine-1-yl-carbonyl)amino>acetylamino-1-carba-1-dethia-3-cephem-4-carboxylic acid

Conditions
ConditionsYield
93%
3-Methyl-4-isopropylphenol
3228-02-2

3-Methyl-4-isopropylphenol

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

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

4-isopropyl-3-methylphenyl N-(4-ethyl-2,3-dioxo-1-piperazine)carbamate

4-isopropyl-3-methylphenyl N-(4-ethyl-2,3-dioxo-1-piperazine)carbamate

Conditions
ConditionsYield
With triethylamine In acetonitrile at 20℃; for 4h;92%
D-Threonine
632-20-2

D-Threonine

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

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

C11H17N3O6

C11H17N3O6

Conditions
ConditionsYield
With sodium carbonate In water at 20℃; for 11h; Reagent/catalyst; Solvent; Large scale;90.2%
7β-<(2R)-2-phenyl-2-amino>acetylamino-3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-3-cephem-4-carboxylic acid
73910-33-5

7β-<(2R)-2-phenyl-2-amino>acetylamino-3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-3-cephem-4-carboxylic acid

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

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

7β-<(2R)-2-phenyl-2-(4-ethyl-2,3-dioxopiperazin-1-yl-carbonyl)amino>acetylamino-3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-1-carba-1-dethia-3-cephem-4-carboxylic acid
73910-34-6

7β-<(2R)-2-phenyl-2-(4-ethyl-2,3-dioxopiperazin-1-yl-carbonyl)amino>acetylamino-3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-1-carba-1-dethia-3-cephem-4-carboxylic acid

Conditions
ConditionsYield
With benzenesulfonamide; methyloxirane In acetonitrile for 0.416667h;90%
1-Ethyl-4-trimethylsilanyl-piperazine-2,3-dione

1-Ethyl-4-trimethylsilanyl-piperazine-2,3-dione

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

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

N,N'-carbonyl-bis-(4-ethyl-2,3-dioxopiperazine)

N,N'-carbonyl-bis-(4-ethyl-2,3-dioxopiperazine)

Conditions
ConditionsYield
In dichloromethane at -5 - 25℃; for 8.67h; Solvent;84%
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%
α-amino-α-(2-benzyloxycarbonylaminothiazol-4-yl)acetic acid
72699-69-5

α-amino-α-(2-benzyloxycarbonylaminothiazol-4-yl)acetic acid

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

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

(+/-)-α-(2-benzyloxycarbonylaminothiazol-4-yl)-α-(4-ethyl-2,3-dioxopiperazin-1-ylcarbonylamino)acetic acid
85208-16-8

(+/-)-α-(2-benzyloxycarbonylaminothiazol-4-yl)-α-(4-ethyl-2,3-dioxopiperazin-1-ylcarbonylamino)acetic acid

Conditions
ConditionsYield
With triethylamine In acetone for 1h; Ambient temperature;69%
<4S,5R,6S(R)>-3-(hydroxymethyl)-6-<1-<(tert-butyldimethylsilyl)oxy>ethyl>-7-oxo-4-thia-1-azabicyclo<3.2.0>hept-2-enecarboxylic acid 2-allyl ester
88585-78-8

<4S,5R,6S(R)>-3-(hydroxymethyl)-6-<1-<(tert-butyldimethylsilyl)oxy>ethyl>-7-oxo-4-thia-1-azabicyclo<3.2.0>hept-2-enecarboxylic acid 2-allyl ester

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

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

(5R,6S)-6-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-3-(4-ethyl-2,3-dioxo-piperazine-1-carbonyloxymethyl)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid allyl ester

(5R,6S)-6-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-3-(4-ethyl-2,3-dioxo-piperazine-1-carbonyloxymethyl)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid allyl ester

Conditions
ConditionsYield
With N,N-diethyl-N-isopropylamine In dichloromethane51%
levodopa
59-92-7

levodopa

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

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

(S)-3-(3,4-Dihydroxy-phenyl)-2-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-propionic acid
263154-16-1

(S)-3-(3,4-Dihydroxy-phenyl)-2-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-propionic acid

Conditions
ConditionsYield
Stage #1: levodopa With chloro-trimethyl-silane; 1,1,1,3,3,3-hexamethyl-disilazane for 2h; silylation; Heating;
Stage #2: 4-ethyl-2,3-dioxopiperazine-1-carbonyl chloride In dichloromethane at 20℃; for 1.5h; Acylation;
Stage #3: With water In acetone for 0.3h; pH=1 - 2; desilylation;
49%
C18H19N7O5S2

C18H19N7O5S2

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

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

Conditions
ConditionsYield
With potassium carbonate In water; ethyl acetate at 20℃;42%
D-3,4-Dihydroxyphenyl glycine

D-3,4-Dihydroxyphenyl glycine

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

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

D-2-[(4-Ethyl-2,3-dioxopiperazin-1-yl)carbonylamino]-2-(3,4-dihydroxyphenyl)acetic acid
74985-17-4

D-2-[(4-Ethyl-2,3-dioxopiperazin-1-yl)carbonylamino]-2-(3,4-dihydroxyphenyl)acetic acid

Conditions
ConditionsYield
With chloro-trimethyl-silane In dichloromethane; water; acetone; 1,1,1,3,3,3-hexamethyl-disilazane40%
With hydrogenchloride In diethyl ether; dichloromethane; ethyl acetate; acetone; N,N-diethyl-1,1,1-trimethylsilanamine27%
2-(3-{[5-(2-aminoethoxy)benzothiazol-2-ylmethyl]amino}-[1,2,4]triazin-5-yl)-3-methylphenol hydrochloride

2-(3-{[5-(2-aminoethoxy)benzothiazol-2-ylmethyl]amino}-[1,2,4]triazin-5-yl)-3-methylphenol hydrochloride

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

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

C27H28N8O5S
1426097-00-8

C27H28N8O5S

Conditions
ConditionsYield
With N-ethyl-N,N-diisopropylamine In N,N-dimethyl-formamide at 0℃; Inert atmosphere;29%
t-butyl 7β-(D-2-amino-2-phenylacetamido)-7α-formamidocephalosporanate

t-butyl 7β-(D-2-amino-2-phenylacetamido)-7α-formamidocephalosporanate

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

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

t-Butyl 7β-[D-2-[(4-Ethyl-2,3-dioxopiperazin-1-yl)carbonylamino]-2-phenylacetamido]-7α-formamidocephalosporanate

t-Butyl 7β-[D-2-[(4-Ethyl-2,3-dioxopiperazin-1-yl)carbonylamino]-2-phenylacetamido]-7α-formamidocephalosporanate

Conditions
ConditionsYield
With pyridine In dichloromethane22%
4-(aminomethyl)-N-(2-nitro-5-(thiophen-2-yl)phenyl)benzamide hydrochloride
1364569-65-2

4-(aminomethyl)-N-(2-nitro-5-(thiophen-2-yl)phenyl)benzamide hydrochloride

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

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

4-ethyl-N-(4-(2-nitro-5-(thiophen-2-yl)phenylcarbamoyl)benzyl)-2,3-dioxopiperazine-1-carboxamide
1364569-75-4

4-ethyl-N-(4-(2-nitro-5-(thiophen-2-yl)phenylcarbamoyl)benzyl)-2,3-dioxopiperazine-1-carboxamide

Conditions
ConditionsYield
With triethylamine In dichloromethane; N,N-dimethyl-formamide at 20℃;22%
6-<(+/-)-α-amino-α-(2-aminothiazol-4-yl)acetamido>penicillanic acid
85208-10-2

6-<(+/-)-α-amino-α-(2-aminothiazol-4-yl)acetamido>penicillanic acid

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

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

A

6-<(+/-)-α-(2-aminothiazol-4-yl)-α-(4-ethyl-2,3-dioxopiperazin-1-ylcarbonylamino)acetamido>penicillanic acid
85208-19-1, 85208-20-4, 85280-44-0

6-<(+/-)-α-(2-aminothiazol-4-yl)-α-(4-ethyl-2,3-dioxopiperazin-1-ylcarbonylamino)acetamido>penicillanic acid

B

1-ethyl-2,3-dioxo-piperazine
59702-31-7

1-ethyl-2,3-dioxo-piperazine

Conditions
ConditionsYield
With sodium hydrogencarbonate 1.) THF, H2O, 0 deg C, 2.) pH=7-7.5, room temperature, 1 h;A 21%
B n/a
(4R,8S)-8-(E)-2-amino-1-(((tert-butyldimethylsilyl)oxy)imino)ethyl-5-(benzyloxy)-1-methyl-1,4,5,8-tetrahydro-6H-4,7-methanopyrazolo[3,4-e][1,3]diazepin-6-one

(4R,8S)-8-(E)-2-amino-1-(((tert-butyldimethylsilyl)oxy)imino)ethyl-5-(benzyloxy)-1-methyl-1,4,5,8-tetrahydro-6H-4,7-methanopyrazolo[3,4-e][1,3]diazepin-6-one

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

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

N-((E)-2-((4R,8S)-5-(benzyloxy)-1-methyl-6-oxo-4,5,6,8-tetrahydro-1H-4,7-methanopyrazolo[3,4-e][1,3]diazepin-8-yl)-2-(((tert-butyldimethylsilyl)oxy)imino)ethyl)-4-ethyl-2,3-dioxopiperazine-1-carboxamide

N-((E)-2-((4R,8S)-5-(benzyloxy)-1-methyl-6-oxo-4,5,6,8-tetrahydro-1H-4,7-methanopyrazolo[3,4-e][1,3]diazepin-8-yl)-2-(((tert-butyldimethylsilyl)oxy)imino)ethyl)-4-ethyl-2,3-dioxopiperazine-1-carboxamide

Conditions
ConditionsYield
With pyridine; triethylamine at 20℃; for 0.333333h;18.4%
7β-<(2R)-2-phenyl-2-amino>acetylamino-3-methoxy-1-carba-1-dethia-3-cephem-4-carboxylic acid
73910-42-6

7β-<(2R)-2-phenyl-2-amino>acetylamino-3-methoxy-1-carba-1-dethia-3-cephem-4-carboxylic acid

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

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

7β-<(2R)-2-phenyl-2-(4-ethyl-2,3-dioxopiperazin-1-yl-carbonyl)amino>acetylamino-3-methoxy-1-carba-1-dethia-3-cephem-4-carboxylic acid
73910-43-7

7β-<(2R)-2-phenyl-2-(4-ethyl-2,3-dioxopiperazin-1-yl-carbonyl)amino>acetylamino-3-methoxy-1-carba-1-dethia-3-cephem-4-carboxylic acid

Conditions
ConditionsYield
With benzenesulfonamide; methyloxirane In acetonitrile15 mg
CL191,121
161855-50-1

CL191,121

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

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

(4R,5S,6S)-3-((2R,3R)-2-{[(4-Ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-methyl}-tetrahydro-furan-3-ylsulfanyl)-6-((R)-1-hydroxy-ethyl)-4-methyl-7-oxo-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid

(4R,5S,6S)-3-((2R,3R)-2-{[(4-Ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-methyl}-tetrahydro-furan-3-ylsulfanyl)-6-((R)-1-hydroxy-ethyl)-4-methyl-7-oxo-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid

Conditions
ConditionsYield
With N-ethyl-N,N-diisopropylamine In dichloromethane
(4R,5S,6S)-3-(5-Aminomethyl-tetrahydro-furan-3-ylsulfanyl)-6-((R)-1-hydroxy-ethyl)-4-methyl-7-oxo-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid

(4R,5S,6S)-3-(5-Aminomethyl-tetrahydro-furan-3-ylsulfanyl)-6-((R)-1-hydroxy-ethyl)-4-methyl-7-oxo-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid

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

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

Sodium; (4R,5S,6S)-3-(5-{[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-methyl}-tetrahydro-furan-3-ylsulfanyl)-6-((R)-1-hydroxy-ethyl)-4-methyl-7-oxo-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylate

Sodium; (4R,5S,6S)-3-(5-{[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-methyl}-tetrahydro-furan-3-ylsulfanyl)-6-((R)-1-hydroxy-ethyl)-4-methyl-7-oxo-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylate

Conditions
ConditionsYield
With N-ethyl-N,N-diisopropylamine In dichloromethane
α-amino(3,4-dihydroxyphenyl)acetic acid hydrobromide

α-amino(3,4-dihydroxyphenyl)acetic acid hydrobromide

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

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

D-2-[(4-Ethyl-2,3-dioxopiperazin-1-yl)carbonylamino]-2-(3,4-dihydroxyphenyl)acetic acid
74985-17-4

D-2-[(4-Ethyl-2,3-dioxopiperazin-1-yl)carbonylamino]-2-(3,4-dihydroxyphenyl)acetic acid

Conditions
ConditionsYield
Stage #1: α-amino(3,4-dihydroxyphenyl)acetic acid hydrobromide With chloro-trimethyl-silane; 1,1,1,3,3,3-hexamethyl-disilazane for 2h; silylation; Heating;
Stage #2: 4-ethyl-2,3-dioxopiperazine-1-carbonyl chloride In dichloromethane at 20℃; for 1.5h; Acylation;
Stage #3: With water In acetone for 0.3h; pH=1 - 2; desilylation;
D-Dopa
5796-17-8

D-Dopa

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

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

(R)-3-(3,4-Dihydroxy-phenyl)-2-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-propionic acid

(R)-3-(3,4-Dihydroxy-phenyl)-2-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-propionic acid

Conditions
ConditionsYield
Stage #1: D-Dopa With chloro-trimethyl-silane; 1,1,1,3,3,3-hexamethyl-disilazane for 2h; silylation; Heating;
Stage #2: 4-ethyl-2,3-dioxopiperazine-1-carbonyl chloride In dichloromethane at 20℃; for 1.5h; Acylation;
Stage #3: With water In acetone for 0.3h; pH=1 - 2; desilylation;
4-ethyl-2,3-dioxopiperazine-1-carbonyl chloride
59703-00-3

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

(3,4-dihydroxy-phenyl)-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-acetic acid 2,5-dioxo-pyrrolidin-1-yl ester

(3,4-dihydroxy-phenyl)-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-acetic acid 2,5-dioxo-pyrrolidin-1-yl ester

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: 1,1,1,3,3,3-hexamethyldisilazane; trimethylsilyl chloride / 2 h / Heating
1.2: CH2Cl2 / 1.5 h / 20 °C
1.3: water / acetone / 0.3 h / pH 1 - 2
2.1: DCC / tetrahydrofuran / 2 h
View Scheme
4-ethyl-2,3-dioxopiperazine-1-carbonyl chloride
59703-00-3

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

(R)-3-(3,4-Dihydroxy-phenyl)-2-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-propionic acid 2,5-dioxo-pyrrolidin-1-yl ester

(R)-3-(3,4-Dihydroxy-phenyl)-2-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-propionic acid 2,5-dioxo-pyrrolidin-1-yl ester

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: 1,1,1,3,3,3-hexamethyldisilazane; trimethylsilyl chloride / 2 h / Heating
1.2: CH2Cl2 / 1.5 h / 20 °C
1.3: water / acetone / 0.3 h / pH 1 - 2
2.1: DCC / tetrahydrofuran / 2 h
View Scheme
4-ethyl-2,3-dioxopiperazine-1-carbonyl chloride
59703-00-3

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

(S)-3-(3,4-Dihydroxy-phenyl)-2-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-propionic acid 2,5-dioxo-pyrrolidin-1-yl ester

(S)-3-(3,4-Dihydroxy-phenyl)-2-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-propionic acid 2,5-dioxo-pyrrolidin-1-yl ester

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1.1: 1,1,1,3,3,3-hexamethyldisilazane; trimethylsilyl chloride / 2 h / Heating
1.2: CH2Cl2 / 1.5 h / 20 °C
1.3: 49 percent / water / acetone / 0.3 h / pH 1 - 2
2.1: DCC / tetrahydrofuran / 2 h
View Scheme
4-ethyl-2,3-dioxopiperazine-1-carbonyl chloride
59703-00-3

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

(2S,3S)-3-{2-(3,4-Dihydroxy-phenyl)-2-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-acetylamino}-2-methyl-4-oxo-azetidine-1-sulfonic acid; compound with triethyl-amine

(2S,3S)-3-{2-(3,4-Dihydroxy-phenyl)-2-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-acetylamino}-2-methyl-4-oxo-azetidine-1-sulfonic acid; compound with triethyl-amine

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: 1,1,1,3,3,3-hexamethyldisilazane; trimethylsilyl chloride / 2 h / Heating
1.2: CH2Cl2 / 1.5 h / 20 °C
1.3: water / acetone / 0.3 h / pH 1 - 2
2.1: DCC / tetrahydrofuran / 2 h
3.1: 61 mg / tetrahydrofuran; H2O / 3 h / 20 °C
View Scheme
4-ethyl-2,3-dioxopiperazine-1-carbonyl chloride
59703-00-3

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

(2S,3S)-3-{(S)-3-(3,4-Dihydroxy-phenyl)-2-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-propionylamino}-2-methyl-4-oxo-azetidine-1-sulfonic acid; compound with triethyl-amine

(2S,3S)-3-{(S)-3-(3,4-Dihydroxy-phenyl)-2-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-propionylamino}-2-methyl-4-oxo-azetidine-1-sulfonic acid; compound with triethyl-amine

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: 1,1,1,3,3,3-hexamethyldisilazane; trimethylsilyl chloride / 2 h / Heating
1.2: CH2Cl2 / 1.5 h / 20 °C
1.3: 49 percent / water / acetone / 0.3 h / pH 1 - 2
2.1: DCC / tetrahydrofuran / 2 h
3.1: 84 percent / tetrahydrofuran; H2O / 3 h / 20 °C
View Scheme
4-ethyl-2,3-dioxopiperazine-1-carbonyl chloride
59703-00-3

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

(2S,3S)-3-{(R)-3-(3,4-Dihydroxy-phenyl)-2-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-propionylamino}-2-methyl-4-oxo-azetidine-1-sulfonic acid; compound with triethyl-amine

(2S,3S)-3-{(R)-3-(3,4-Dihydroxy-phenyl)-2-[(4-ethyl-2,3-dioxo-piperazine-1-carbonyl)-amino]-propionylamino}-2-methyl-4-oxo-azetidine-1-sulfonic acid; compound with triethyl-amine

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: 1,1,1,3,3,3-hexamethyldisilazane; trimethylsilyl chloride / 2 h / Heating
1.2: CH2Cl2 / 1.5 h / 20 °C
1.3: water / acetone / 0.3 h / pH 1 - 2
2.1: DCC / tetrahydrofuran / 2 h
3.1: 129 mg / tetrahydrofuran; H2O / 3 h / 20 °C
View Scheme

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