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Hangzhou Dingyan Chem Co., Ltd

Items Standard Result Assay (Ursolic acid) 98%min 98.22% ----------------------------------------------------------------

High purity 13991-36-1 4-BROMOCROTONIC ACID

Cas:13991-36-1

Min.Order:1 Gram

FOB Price: $100.0 / 500.0

Type:Trading Company

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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

4-bromocrotonic Acid CAS NO.13991-36-1

Cas:13991-36-1

Min.Order:1 Metric Ton

FOB Price: $1.0 / 3.0

Type:Manufacturers

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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 Oled CAS 13991-36-1 2-Butenoic acid,4-bromo-, (2E)-

Cas:13991-36-1

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-Bromocrotonic acid

Cas:13991-36-1

Min.Order:5 Kiloliter

FOB Price: $1.2 / 5.0

Type:Manufacturers

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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

CAS No. 13991-36-1 4-Bromocrotonic Acid

Cas:13991-36-1

Min.Order:1 Kilogram

FOB Price: $3.0 / 10.0

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

Pharmaceutical Grade CAS 13991-36-1 with competitive price

Cas:13991-36-1

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

4-bromocrotonic Acid CAS NO.13991-36-1

Cas:13991-36-1

Min.Order:1 Kilogram

Negotiable

Type:Trading Company

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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

2-Butenoic acid,4-bromo-, (2E)- 13991-36-1

Cas:13991-36-1

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

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Qingdao Beluga Import and Export Co., LTD

4-BROMOCROTONIC ACID CAS:13991-36-1 Qingdao Belugas Import and Export Co., Ltd. is a scientific and technological company integrating research and development, production and trade of chemical intermediates, specializing in high quality organic inte

4-BROMOCROTONIC ACID CAS:13991-36-1

Cas:13991-36-1

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

2-Butenoic acid,4-bromo-, (2E)-

Cas:13991-36-1

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Hebei Mojin Biotechnology Co.,Ltd

1. Customs clearance 1) By Express: Normally there is no specical need for the recipient to clear the customs. If the customs has an objection,our rich experienced and professional group will help you clear the customs. 2) By Air and by Sea: Our

Best Price CAS 13991-36-1 4-BROMOCROTONIC ACID C4H5BrO2 99%

Cas:13991-36-1

Min.Order:20 Kilogram

FOB Price: $10.0 / 25.0

Type:Trading Company

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Wuhan Zenuo Biological Medicine Technology Co Ltd

Product Name: 4-BROMOCROTONIC ACID Synonyms: gamma-Bromocrotonic acid;TRANS-4-BROMO-2-BUTENOIC ACID;2-Butenoic acid, 4-bromo-, (E)-;4-BroMobut-2-enoic acid;(2E)-4-Bromo-2-butenoic acid;(E)-4-Bromo-2-butenoic acid;gamma-Bromocrotonic acid, tech;4

4-BROMOCROTONIC ACID big supplier with lower price

Cas:13991-36-1

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

2-Butenoic acid,4-bromo-, (2E)-

Cas:13991-36-1

Min.Order:0

Negotiable

Type:Lab/Research institutions

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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 Business Custom Synthesis: Trading(Raw Mater

4-bromocrotonic

Cas:13991-36-1

Min.Order:0 Metric Ton

Negotiable

Type:Lab/Research institutions

inquiry

ACHIEVER SYSTEAM BIOCHEM CO., LTD.

We are specialized in custom synthesis, chemical/pharmaceutical/ pesticides outsourcing and contract research. We are committed to provide excellence in researching, manufacturing and drug discovery process. Our research team of s

4-BROMOCROTONIC ACID

Cas:13991-36-1

Min.Order:100 Gram

FOB Price: $1.0

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

2-Butenoic acid,4-bromo-, (2E)-

Cas:13991-36-1

Min.Order:0

Negotiable

Type:Lab/Research institutions

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Zibo Hangyu Biotechnology Development Co., Ltd

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

4-bromocrotonic acid

Cas:13991-36-1

Min.Order:10 Gram

FOB Price: $100.0

Type:Lab/Research institutions

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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-bromocrotonic Acid Manufacturer/High quality/Best price/In stock

Cas:13991-36-1

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

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Jiangsu Qianyu Molecular Technology Co., LTD.

Our Advantages A. International Top level TechnologyOur company owned biomedicine experts are famous at home and abroad with rich experience in research and development in the field of efficient chiral functional molecules research and development an

Buy Top Purity 4-BROMOCROTONIC ACID

Cas:13991-36-1

Min.Order:0

Negotiable

Type:Trading Company

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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-bromocrotonic Acid CAS NO.13991-36-1

Cas:13991-36-1

Min.Order:1 Kilogram

FOB Price: $18.0 / 20.0

Type:Trading Company

inquiry

TAIZHOU ZHENYU BIOTECHNOLOGY CO., LTD

Zhenyu biotech exported this product to many countries and regions at best price. if you are looking for the material's manufacturer or supplier in china, zhenyu biotech is your best choice. pls contact with us freely for getting detailed

4-BROMOCROTONIC ACID

Cas:13991-36-1

Min.Order:1 Kilogram

FOB Price: $2.0

Type:Lab/Research institutions

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-BROMOCROTONIC ACID

Cas:13991-36-1

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

KAISA GROUP INC

1.Applied in food field.it can improve the immune system and prolong life. 2.Appliedin cosmetic field.it can improve the skin care. 3.Applied in pharmaceutical field.it can treat various dieases. 4.Our product quality assurance will make our customer

4-bromocrotonic Acid CAS NO.13991-36-1

Cas:13991-36-1

Min.Order:1 Metric Ton

FOB Price: $1.5

Type:Trading Company

inquiry

Suzhou Health Chemicals Co., Ltd.

High quality,stable supply chain.Appearance:white/off-white or light yellow Storage:Store in cool and dry place, keep away from strong light and heat. Package:aluminum bottle,glass bottle,PTFE bottle,cardboard drum Application:This product can be use

(2E)-4-Bromo-2-butenoic acid

Cas:13991-36-1

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

SAGECHEM LIMITED

SAGECHEM is a chemical R&D, manufacturing and distribution company in China since 2009, including pharmaceutical intermediates, agrochemical, dyestuff intermediates, organosilicone, API and etc. We also offer a full range of services in custom synthe

4-Bromocrotonic acid

Cas:13991-36-1

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Golden Pharma Co., Limited

GOLDEN PHARMA CO.,LIMITED.is a professional pharmaceutical company,our team have more than 20years expereince in pharmaceutical production and sales. we are a professional technical enterprise specializing in the R & D, production,QA regulation

4-BROMOCROTONIC ACID

Cas:13991-36-1

Min.Order:1 Kilogram

Negotiable

Type:Other

inquiry

Bluecrystal chem-union

We are a Union of chemistry in China, consists of chemists,engineers, laboratories,factories in China. We organize surplus capacity of R&D and production as well as custom synthesis for chemical products and chemical business project. We are supp

4-bromocrotonic Acid CAS NO.13991-36-1

Cas:13991-36-1

Min.Order:1 Metric Ton

FOB Price: $1.0

Type:Trading Company

inquiry

Win-Win chemical Co.Ltd

Stock products, own laboratory Package:Grams, Kilograms Application:For R&D Transportation:According to customer request Port:Shanghai

4-BROMOCROTONIC ACID cas no. 13991-36-1 98%

Cas:13991-36-1

Min.Order:0

Negotiable

Type:Lab/Research institutions

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Hubei Vanz Pharm Co.,Ltd

ISO/factory/goodqualityAppearance:off white Storage:Dry,cool place Package:drum Application:active pharmaceutical ingredients Transportation:by air/sea/express Port:shenzhen/shanghai

4-BROMOCROTONIC ACID

Cas:13991-36-1

Min.Order:0

Negotiable

Type:Manufacturers

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GIHI CHEMICALS CO.,LIMITED

Lower price, sample is available,SDS test documents are available,large stock in warehouseAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:Fine chemical intermediates, used as the main raw material for the synthe

4-bromocrotonic Acid CAS NO.13991-36-1

Cas:13991-36-1

Min.Order:0

Negotiable

Type:Lab/Research institutions

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Synthetic route

(E)-but-2-enoic acid
107-93-7

(E)-but-2-enoic acid

4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

Conditions
ConditionsYield
With N-Bromosuccinimide; 2,2'-azobis(isobutyronitrile) In tetrachloromethane Reflux;98%
With N-Bromosuccinimide; dibenzoyl peroxide In tetrachloromethane at 77℃; for 4h;93%
With N-Bromosuccinimide; 2,2'-azobis(isobutyronitrile) In benzene at 84℃; for 2.5h;91.3%
methyl-4-bromo-2-butenoate
1117-71-1, 56699-18-4, 6000-00-6

methyl-4-bromo-2-butenoate

4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

Conditions
ConditionsYield
With lithium hydroxide In tetrahydrofuran; water for 3h;84.4%
With lithium hydroxide monohydrate; water In tetrahydrofuran at 0℃; for 2h;83%
With lithium hydroxide monohydrate; water In tetrahydrofuran at 0℃; for 2h;83%
(E)-4-chlorobut-2-enoic acid
26340-58-9

(E)-4-chlorobut-2-enoic acid

4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

Conditions
ConditionsYield
With sodium bromide In acetone at 50℃; for 120h;81%
but-3-enoic acid
625-38-7

but-3-enoic acid

4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

Conditions
ConditionsYield
With N-Bromosuccinimide Inert atmosphere;70%
2-butenoic acid
3724-65-0

2-butenoic acid

4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

Conditions
ConditionsYield
With N-Bromosuccinimide; 2,2'-azobis(isobutyronitrile) In toluene for 2h; Heating;47%
With N-Bromosuccinimide; 2,2'-azobis(isobutyronitrile) In tetrachloromethane at 95 - 100℃; for 6h;
4-bromo-trans-crotonic acid ethyl ester
37746-78-4

4-bromo-trans-crotonic acid ethyl ester

4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

Conditions
ConditionsYield
With barium dihydroxide; ethanol at -10℃; zuletzt 1-2grad;
With lithium hydroxide monohydrate; water In tetrahydrofuran at 0℃; for 2h;200 mg
vinyl glycolic acid
600-17-9

vinyl glycolic acid

4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

Conditions
ConditionsYield
With diethyl ether; phosphorus tribromide
γ-bromocrotonate de trimethylsilyle
88239-39-8

γ-bromocrotonate de trimethylsilyle

4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

Conditions
ConditionsYield
With water for 0.0833333h; Yield given;
methyl-4-bromo-2-butenoate
1117-71-1, 56699-18-4, 6000-00-6

methyl-4-bromo-2-butenoate

hydrogen bromide
10035-10-6, 12258-64-9

hydrogen bromide

4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

diethyl ether
60-29-7

diethyl ether

vinyl glycolic acid
600-17-9

vinyl glycolic acid

phosphorus tribromide
7789-60-8

phosphorus tribromide

4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

ethanol
64-17-5

ethanol

methyl-4-bromo-2-butenoate
1117-71-1, 56699-18-4, 6000-00-6

methyl-4-bromo-2-butenoate

Ba(OH)2

Ba(OH)2

4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

N-Bromosuccinimide
128-08-5

N-Bromosuccinimide

4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

Conditions
ConditionsYield
With hydrogenchloride; dibenzoyl peroxide In tetrachloromethane; (E)-but-2-enoic acid
4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

4-bromocrotonyl chloride
99083-25-7

4-bromocrotonyl chloride

Conditions
ConditionsYield
With thionyl chloride at 80℃; for 16h;100%
With oxalyl dichloride In dichloromethane; N,N-dimethyl-formamide at 20℃; for 1h; Temperature; Inert atmosphere;98%
With thionyl chloride
4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

trans-4-aminocrotonic acid
38090-53-8

trans-4-aminocrotonic acid

Conditions
ConditionsYield
With ammonium hydroxide In tetrahydrofuran at 20℃; for 6h; Cooling with ice; Inert atmosphere;100%
With ammonium hydroxide at 20℃; for 7h; Inert atmosphere;100%
With ammonium hydroxide In tetrahydrofuran; water at 20℃; for 6h; Cooling with ice; Inert atmosphere;100%
oxalyl dichloride
79-37-8

oxalyl dichloride

4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

4-bromocrotonyl chloride
99083-25-7

4-bromocrotonyl chloride

Conditions
ConditionsYield
In dichloromethane; N,N-dimethyl-formamide at 0 - 20℃;100%
4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

cyclohexanone
108-94-1

cyclohexanone

2-(1-hydroxycyclohexyl)but-3-enoic acid
41955-33-3

2-(1-hydroxycyclohexyl)but-3-enoic acid

Conditions
ConditionsYield
Stage #1: 4-bromocrotonic acid With indium In methanol
Stage #2: cyclohexanone In methanol at 50℃; for 16h;
99%
polystyrene, 1 percent cross-linked, with -CH2NH2 groups

polystyrene, 1 percent cross-linked, with -CH2NH2 groups

4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

polystyrene, 1 percent cross-linked, with -CH2NHCOCH=CHCH2Br groups

polystyrene, 1 percent cross-linked, with -CH2NHCOCH=CHCH2Br groups

Conditions
ConditionsYield
With benzotriazol-1-ol; diisopropyl-carbodiimide In dichloromethane; N,N-dimethyl-formamide at 25℃; for 48h;98%
methanol
67-56-1

methanol

4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

methyl-4-bromo-2-butenoate
1117-71-1, 56699-18-4, 6000-00-6

methyl-4-bromo-2-butenoate

Conditions
ConditionsYield
With thionyl chloride at 0℃; for 15h;93.1%
With sulfuric acid Heating;
4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

sodium methylate
124-41-4

sodium methylate

(E)-4-methoxybut-2-enoic acid
63968-74-1

(E)-4-methoxybut-2-enoic acid

Conditions
ConditionsYield
In methanol at 20℃; for 2.5h; Reflux;92%
With methanol In methanol for 15h;71%
4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

6-amino-4-[(3-bromophenyl)-amino]pyrido[3,4-d]pyrimidine
175357-96-7

6-amino-4-[(3-bromophenyl)-amino]pyrido[3,4-d]pyrimidine

1-t-Butoxycarbonylpiperazine
57260-71-6

1-t-Butoxycarbonylpiperazine

(2E)-N-[4-(3-bromoanilino)pyrido[3,4-d]pyrimidin-6-yl]-4-[(4-tert-butoxycarbonyl)piperazin-1-yl]-2-butenamide

(2E)-N-[4-(3-bromoanilino)pyrido[3,4-d]pyrimidin-6-yl]-4-[(4-tert-butoxycarbonyl)piperazin-1-yl]-2-butenamide

Conditions
ConditionsYield
Stage #1: 4-bromocrotonic acid With 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In N,N-dimethyl-formamide at 0℃; for 1h;
Stage #2: 6-amino-4-[(3-bromophenyl)-amino]pyrido[3,4-d]pyrimidine In N,N-dimethyl-formamide at 0 - 20℃; for 1h;
Stage #3: 1-t-Butoxycarbonylpiperazine In N,N-dimethyl-formamide at 20℃; for 0.5h;
91%
4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

(7S)‐2‐(4‐phenoxyphenyl)‐7‐(piperidin‐4‐yl)‐4H,5H,6H,7H‐pyrazolo[1,5‐a]pyrimidine‐3‐carboxamide

(7S)‐2‐(4‐phenoxyphenyl)‐7‐(piperidin‐4‐yl)‐4H,5H,6H,7H‐pyrazolo[1,5‐a]pyrimidine‐3‐carboxamide

(S,E)-7-(1-(3-bromoacryloyl)piperidin-4-yl)-2-(4-phenoxyphenyl)-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrimidine-3-carboxamide

(S,E)-7-(1-(3-bromoacryloyl)piperidin-4-yl)-2-(4-phenoxyphenyl)-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrimidine-3-carboxamide

Conditions
ConditionsYield
With benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride In dichloromethane at 20℃;90%
4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

diisopropyl-carbodiimide
693-13-0

diisopropyl-carbodiimide

A

1-((Z)-4-Bromo-but-2-enoyl)-1,3-diisopropyl-urea

1-((Z)-4-Bromo-but-2-enoyl)-1,3-diisopropyl-urea

B

1-((E)-4-Bromo-but-2-enoyl)-1,3-diisopropyl-urea

1-((E)-4-Bromo-but-2-enoyl)-1,3-diisopropyl-urea

Conditions
ConditionsYield
In dichloromethane for 3h; Ambient temperature; Title compound not separated from byproducts;A 12.5%
B 87.5%
4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

benzaldehyde
100-52-7

benzaldehyde

2-[hydroxy(phenyl)methyl]but-3-enoic acid
69637-13-4

2-[hydroxy(phenyl)methyl]but-3-enoic acid

Conditions
ConditionsYield
Stage #1: 4-bromocrotonic acid With indium In ethanol; water
Stage #2: benzaldehyde In ethanol; water at 30℃; for 16h;
87%
4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

8-isopropyl-N4-(piperidin-4-ylmethyl)-N2-(tetrahydro-2H-pyran-4-yl)pyrazolo [1,5-a][1,3,5]triazine-2,4-diamine

8-isopropyl-N4-(piperidin-4-ylmethyl)-N2-(tetrahydro-2H-pyran-4-yl)pyrazolo [1,5-a][1,3,5]triazine-2,4-diamine

(E)-4-bromo-1-(4-(((8-isopropyl-2-((tetrahydro-2H-pyran-4-yl)amino)pyrazolo[1,5-a][1,3,5]triazin-4-yl)amino)methyl)piperidin-1-yl)but-2-en-1-one

(E)-4-bromo-1-(4-(((8-isopropyl-2-((tetrahydro-2H-pyran-4-yl)amino)pyrazolo[1,5-a][1,3,5]triazin-4-yl)amino)methyl)piperidin-1-yl)but-2-en-1-one

Conditions
ConditionsYield
With N-ethyl-N,N-diisopropylamine; HATU In N,N-dimethyl-formamide at 0 - 20℃; for 1h;86.5%
4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

N,N-dimethylammonium chloride
506-59-2

N,N-dimethylammonium chloride

(E)-4-bromobut-2-enoic acid dimethylamide
137131-09-0

(E)-4-bromobut-2-enoic acid dimethylamide

Conditions
ConditionsYield
Stage #1: 4-bromocrotonic acid With oxalyl dichloride; N,N-dimethyl-formamide In dichloromethane at 0 - 20℃; for 4h; Inert atmosphere;
Stage #2: N,N-dimethylammonium chloride With sodium carbonate In dichloromethane at 0℃; for 2h; Inert atmosphere;
86%
4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

benzoin monomethyl ether
3524-62-7

benzoin monomethyl ether

2-(1-hydroxy-2-methoxy-1,2-diphenyl-ethyl)-but-3-enoic acid

2-(1-hydroxy-2-methoxy-1,2-diphenyl-ethyl)-but-3-enoic acid

Conditions
ConditionsYield
Stage #1: 4-bromocrotonic acid With indium In methanol
Stage #2: benzoin monomethyl ether In methanol at 50℃; for 16h;
85%
4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

2-methoxyethylamine
109-85-3

2-methoxyethylamine

(E)-4-bromo-N-(2-methoxyethyl)but-2-enamide

(E)-4-bromo-N-(2-methoxyethyl)but-2-enamide

Conditions
ConditionsYield
Stage #1: 4-bromocrotonic acid With oxalyl dichloride; N,N-dimethyl-formamide In dichloromethane at 0 - 25℃; for 5h;
Stage #2: 2-methoxyethylamine With sodium carbonate In dichloromethane at 20℃;
85%
4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

(S)-2-phenyl-2-((5,6,7,8-tetrahydropyrido[4’,3’:4,5]thieno[2,3-d]pyrimidin-4-yl)amino)ethan-1-ol
1226548-19-1

(S)-2-phenyl-2-((5,6,7,8-tetrahydropyrido[4’,3’:4,5]thieno[2,3-d]pyrimidin-4-yl)amino)ethan-1-ol

1-t-Butoxycarbonylpiperazine
57260-71-6

1-t-Butoxycarbonylpiperazine

tert-butyl (S,E)-4-(4-(4-((2-hydroxy-1-phenylethyl)amino)-5,8-dihydropyrido[4',3':4,5]thieno[2,3-d]pyrimidin-7-(6H)-yl)-4-oxo-but-2-en-1-yl)piperazine-1-carboxylate

tert-butyl (S,E)-4-(4-(4-((2-hydroxy-1-phenylethyl)amino)-5,8-dihydropyrido[4',3':4,5]thieno[2,3-d]pyrimidin-7-(6H)-yl)-4-oxo-but-2-en-1-yl)piperazine-1-carboxylate

Conditions
ConditionsYield
Stage #1: 4-bromocrotonic acid With triethylamine; isobutyl chloroformate In tetrahydrofuran at -15℃; for 0.25h;
Stage #2: (S)-2-phenyl-2-((5,6,7,8-tetrahydropyrido[4’,3’:4,5]thieno[2,3-d]pyrimidin-4-yl)amino)ethan-1-ol With triethylamine In tetrahydrofuran at 0 - 20℃; for 2.16667h;
Stage #3: 1-t-Butoxycarbonylpiperazine With triethylamine In tetrahydrofuran; water for 2h;
75.1%
Stage #1: 4-bromocrotonic acid With triethylamine; isobutyl chloroformate In tetrahydrofuran at -15℃; for 0.25h;
Stage #2: (S)-2-phenyl-2-((5,6,7,8-tetrahydropyrido[4’,3’:4,5]thieno[2,3-d]pyrimidin-4-yl)amino)ethan-1-ol In tetrahydrofuran at 0 - 20℃; for 2.16667h;
Stage #3: 1-t-Butoxycarbonylpiperazine In tetrahydrofuran; water for 2h;
4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

4-chlorobenzaldehyde
104-88-1

4-chlorobenzaldehyde

2-[(4-chloro-phenyl)-hydroxy-methyl]-but-3-enoic acid

2-[(4-chloro-phenyl)-hydroxy-methyl]-but-3-enoic acid

Conditions
ConditionsYield
Stage #1: 4-bromocrotonic acid With indium In methanol
Stage #2: 4-chlorobenzaldehyde In methanol at 50℃; for 16h;
75%
4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

N4-(4-(1H-indol-1-yl)pyrimidin-2-yl)-N1-(2-(dimethylamino)ethyl)-5-methoxy-N1-methylbenzene-1,2,4-triamine

N4-(4-(1H-indol-1-yl)pyrimidin-2-yl)-N1-(2-(dimethylamino)ethyl)-5-methoxy-N1-methylbenzene-1,2,4-triamine

(E)-N-(5-((4-(1H-indol-1-yl)pyrimidin-2-yl)amino)-2-((2-(dimethylamino)ethyl)(methyl)amino)-4-methylphenyl)-4-bromobut-2-enamide

(E)-N-(5-((4-(1H-indol-1-yl)pyrimidin-2-yl)amino)-2-((2-(dimethylamino)ethyl)(methyl)amino)-4-methylphenyl)-4-bromobut-2-enamide

Conditions
ConditionsYield
With N-ethyl-N,N-diisopropylamine; N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate In acetonitrile at 20℃; for 4h;74.5%
pyrrolidine
123-75-1

pyrrolidine

4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

(E)-4-bromo-1-(pyrrolidin-1-yl)but-2-en-1-one

(E)-4-bromo-1-(pyrrolidin-1-yl)but-2-en-1-one

Conditions
ConditionsYield
Stage #1: 4-bromocrotonic acid With oxalyl dichloride; N,N-dimethyl-formamide In dichloromethane at 0℃; for 2h; Inert atmosphere;
Stage #2: pyrrolidine With sodium carbonate In dichloromethane at 0℃; Inert atmosphere;
73%
Stage #1: 4-bromocrotonic acid With oxalyl dichloride; N,N-dimethyl-formamide In dichloromethane at 0 - 20℃; for 1h;
Stage #2: pyrrolidine With N-ethyl-N,N-diisopropylamine In tetrahydrofuran; dichloromethane at 0 - 20℃; for 1h;
6%
4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

C23H20N6O

C23H20N6O

C27H23BrN6O2

C27H23BrN6O2

Conditions
ConditionsYield
Stage #1: 4-bromocrotonic acid With phosphorus pentachloride In dichloromethane for 1.5h; Reflux; Inert atmosphere;
Stage #2: C23H20N6O In dichloromethane for 1.5h; Reflux; Inert atmosphere;
72.6%
4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

N4-(3-chloro-4-fluorophenyl)thieno[2,3-d]pyrimidine-4,6-diamine
1595286-21-7

N4-(3-chloro-4-fluorophenyl)thieno[2,3-d]pyrimidine-4,6-diamine

4,4-ethylenedioxy-piperidine
177-11-7

4,4-ethylenedioxy-piperidine

(E)-N-(4-((3-chloro-4-fluorophenyl)amino)thieno[2,3-d]pyrimidin-6-yl)-4-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)but-2-enamide
1595286-04-6

(E)-N-(4-((3-chloro-4-fluorophenyl)amino)thieno[2,3-d]pyrimidin-6-yl)-4-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)but-2-enamide

Conditions
ConditionsYield
Stage #1: 4-bromocrotonic acid With thionyl chloride In dichloromethane at 20℃;
Stage #2: N4-(3-chloro-4-fluorophenyl)thieno[2,3-d]pyrimidine-4,6-diamine With pyridine In tetrahydrofuran at 0 - 20℃;
Stage #3: 4,4-ethylenedioxy-piperidine With sodium iodide In N,N-dimethyl-formamide at 0 - 20℃;
72%
4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

(2E)-4-hydroxybut-2-enoic acid
24587-49-3

(2E)-4-hydroxybut-2-enoic acid

Conditions
ConditionsYield
With potassium hydroxide for 0.0833333h; Heating;71%
azetidine-3-ol
45347-82-8

azetidine-3-ol

4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

N4-(3-chloro-4-fluorophenyl)thieno[2,3-d]pyrimidine-4,6-diamine
1595286-21-7

N4-(3-chloro-4-fluorophenyl)thieno[2,3-d]pyrimidine-4,6-diamine

(E)-N-(4-((3-chloro-4-fluorophenyl)amino)thieno[2,3-d]pyrimidin-6-yl)-4-(3-hydroxyazetidin-1-yl)but-2-enamide
1595285-90-7

(E)-N-(4-((3-chloro-4-fluorophenyl)amino)thieno[2,3-d]pyrimidin-6-yl)-4-(3-hydroxyazetidin-1-yl)but-2-enamide

Conditions
ConditionsYield
Stage #1: 4-bromocrotonic acid With thionyl chloride In dichloromethane at 20℃;
Stage #2: N4-(3-chloro-4-fluorophenyl)thieno[2,3-d]pyrimidine-4,6-diamine With pyridine In tetrahydrofuran at 0 - 20℃;
Stage #3: azetidine-3-ol With sodium iodide In N,N-dimethyl-formamide at 0 - 20℃;
71%
4-fluoropiperidine
78197-27-0

4-fluoropiperidine

4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

N4-(3-chloro-4-fluorophenyl)thieno[2,3-d]pyrimidine-4,6-diamine
1595286-21-7

N4-(3-chloro-4-fluorophenyl)thieno[2,3-d]pyrimidine-4,6-diamine

(E)-N-(4-((3-chloro-4-fluorophenyl)amino)thieno[2,3-d]pyrimidin-6-yl)-4-(4-fluoropiperidin-1-yl)but-2-enamide
1595285-94-1

(E)-N-(4-((3-chloro-4-fluorophenyl)amino)thieno[2,3-d]pyrimidin-6-yl)-4-(4-fluoropiperidin-1-yl)but-2-enamide

Conditions
ConditionsYield
Stage #1: 4-bromocrotonic acid With thionyl chloride In dichloromethane at 20℃;
Stage #2: N4-(3-chloro-4-fluorophenyl)thieno[2,3-d]pyrimidine-4,6-diamine With pyridine In tetrahydrofuran at 0 - 20℃;
Stage #3: 4-fluoropiperidine With sodium iodide In N,N-dimethyl-formamide at 0 - 20℃;
71%
4-ethylpiperazine
5308-25-8

4-ethylpiperazine

4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

N4-(3-chloro-4-fluorophenyl)thieno[2,3-d]pyrimidine-4,6-diamine
1595286-21-7

N4-(3-chloro-4-fluorophenyl)thieno[2,3-d]pyrimidine-4,6-diamine

(E)-N-(4-((3-chloro-4-fluorophenyl)amino)thieno[2,3-d]pyrimidin-6-yl)-4-(4-ethylpiperazin-1-yl)but-2-enamide
1595285-98-5

(E)-N-(4-((3-chloro-4-fluorophenyl)amino)thieno[2,3-d]pyrimidin-6-yl)-4-(4-ethylpiperazin-1-yl)but-2-enamide

Conditions
ConditionsYield
Stage #1: 4-bromocrotonic acid With thionyl chloride In dichloromethane at 20℃;
Stage #2: N4-(3-chloro-4-fluorophenyl)thieno[2,3-d]pyrimidine-4,6-diamine With pyridine In tetrahydrofuran at 0 - 20℃;
Stage #3: 4-ethylpiperazine With sodium iodide In N,N-dimethyl-formamide at 0 - 20℃;
71%
methanol
67-56-1

methanol

4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

sodium methylate
124-41-4

sodium methylate

(E)-4-methoxybut-2-enoic acid
63968-74-1

(E)-4-methoxybut-2-enoic acid

Conditions
ConditionsYield
for 15h;71%
4-bromocrotonic acid
13991-36-1

4-bromocrotonic acid

6-(1-(1-(azetidine-3-carbonyl)piperidin-4-yl)-1H-pyrazol-4-yl)-4-methoxypyrazolo[1,5-a]pyridine-3-carbonitrile

6-(1-(1-(azetidine-3-carbonyl)piperidin-4-yl)-1H-pyrazol-4-yl)-4-methoxypyrazolo[1,5-a]pyridine-3-carbonitrile

(E)-6-(1-(1-(1-(4-bromobut-2-enoyl)azetidine-3-carbonyl)piperidin-4-yl)-1H-pyrazol-4-yl)-4-methoxypyrazolo[1,5-a]pyridine-3-carbonitrile

(E)-6-(1-(1-(1-(4-bromobut-2-enoyl)azetidine-3-carbonyl)piperidin-4-yl)-1H-pyrazol-4-yl)-4-methoxypyrazolo[1,5-a]pyridine-3-carbonitrile

Conditions
ConditionsYield
Stage #1: 4-bromocrotonic acid With N-ethyl-N,N-diisopropylamine; HATU In dichloromethane at 20℃; for 0.25h;
Stage #2: 6-(1-(1-(azetidine-3-carbonyl)piperidin-4-yl)-1H-pyrazol-4-yl)-4-methoxypyrazolo[1,5-a]pyridine-3-carbonitrile In dichloromethane at 20℃;
71%

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