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 services. DayangChem can provide different quantities of custom synthesis ch
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inquiry1.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
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inquiryHenan 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
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inquiryBest 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
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inquiryOur company was built in 2009 with an ISO certificate.In the past 6 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
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inquiryGOLDEN 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
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inquiryAppearance:Solid powder Storage:Sealed,light and oxygen resistant Package:Foil bag or drum Application:Applied in dietary supplements,pharmaceutical or cosmeticeuticals Transportation:by sea or air Port:Beijing or Guangzhou Port
1.A strong technical force and advanced processing equipments. The quality of the products has been strictly inspected and all kinds of index have reached or exceeded domestic and international standards.2. Now we have established long-term stable re
Shanghai Lonwin Chemical company is a subsidiary of Lonwin Industry Group Limited, was established in 2011 and is headquartered in Shanghai, adjacent to China National Convention and Exhibition Center and Hongqiao transportation hub.Lonwinchem is
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inquiryhigh purity,in stock Package:25kg/drum,or as per customers'demand Application:API,Pharmaceutical intermediates Transportation:air,sea,courier
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inquiryJinhua huayi chemical co., ltd. is dedicated to the development, production and marketing of chemicals. On the basis of equality and mutual benefit, and under the principle of customer first, credit first, quality first, we are ready to join hands
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inquiryR & D enterprises have their own stock in stock Package:1kg Application:pharmaceutical intermediates
Hangzhou ZeErRui Chemical Co., Ltd. is focused on customization, research and development and production of APIs and advanced intermediates, which can effectively compensate for the deficiencies of traditional CRO and CMO. Priority of high-tech bar
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inquiryOur clients, like BASF,CHEMO,Brenntag,ASR,Evonik,Merck and etc.Appearance:COA Storage:in stock Application:MSDS/TDS
Ansciep Chemical is a professional enterprise manufacturing and distributing fine chemicals and speciality chemicals. We have been dedicated to heterocycle compounds and phenyl rings for tens of years. This is our mature product for export. Our quali
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inquiryWe product this chemical more than 10 years . We are very experience to export it to many countries, Our superior & stable quality , competitive price gain warm reception from our customers. Application:Chemical intermediate
Appearance:solid or liquid Storage:sealed in cool and dry place Package:As customer's requested Application:Pharma Intermediate Transportation:by courier/air/sea Port:Any port in China
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inquiry4-bromo-3-methylpyridine 1-oxide
4-bromo-3-methylpyridine
Conditions | Yield |
---|---|
With sodium hypophosphite; palladium on activated charcoal In acetic acid at 60℃; for 1.5h; | 90% |
4-amino-3-methylpyridine
4-bromo-3-methylpyridine
Conditions | Yield |
---|---|
Stage #1: 4-amino-3-methylpyridine With hydrogen bromide; sodium nitrite In water at -15 - -10℃; for 2.25h; Stage #2: With copper(I) bromide In water at -15 - 20℃; for 5h; | 52% |
3-Bromopyridine
lithium diisopropyl amide
methyl iodide
A
4-bromopyridin
B
4-bromo-3-methylpyridine
C
3-Bromo-4-methylpyridin
Conditions | Yield |
---|---|
In tetrahydrofuran at -60℃; Product distribution; Mechanism; temp. change; |
3-Bromopyridine
methyl iodide
A
4-bromo-3-methylpyridine
B
3-Bromo-4-methylpyridin
Conditions | Yield |
---|---|
THF, -60 -> -55.deg C, 1) 15 min, 2) 45 min; Yield given. Multistep reaction. Yields of byproduct given; |
3-methyl-4-nitropyridine N-oxide
4-bromo-3-methylpyridine
Conditions | Yield |
---|---|
With phosphorus tribromide In ethyl acetate for 0.5h; Heating; |
3-picoline-N-oxide
4-bromo-3-methylpyridine
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 80 percent / HNO3; H2SO4 / 2 h / 100 - 105 °C 2: PBr3 / ethyl acetate / 0.5 h / Heating View Scheme |
4-bromo-3-methylpyridine
Conditions | Yield |
---|---|
With sodium hydroxide; phosphorus trichloride In water; 4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran | |
With phosphorus trichloride In dichloromethane at -20 - 20℃; for 0.5h; |
4-bromo-3-methylpyridine
Conditions | Yield |
---|---|
With sodium hydroxide In water | |
With sodium hydroxide In water |
4-bromo-3-methylpyridine
4-bromo-3-methylpyridine 1-oxide
Conditions | Yield |
---|---|
With 3-chloro-benzenecarboperoxoic acid In dichloromethane at 20℃; for 15h; | 97% |
With 3-chloro-benzenecarboperoxoic acid In dichloromethane at 20℃; for 5h; | 48% |
2-chloro-5-methoxyaniline
4-bromo-3-methylpyridine
Conditions | Yield |
---|---|
With 2-(dicyclohexylphosphino)-2',4',6'-tri-1-propyl-1,1'-biphenyl; palladium diacetate; caesium carbonate In toluene at 100℃; for 16h; Microwave irradiation; Inert atmosphere; | 95% |
4-bromo-3-methylpyridine
Conditions | Yield |
---|---|
With (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; potassium phosphate In 1,4-dioxane; water at 125℃; for 2h; Inert atmosphere; Microwave irradiation; Sealed tube; | 92% |
2-formylbenzene boronic acid
4-bromo-3-methylpyridine
2-(3-methyl-pyridin-4-yl)-benzaldehyde
Conditions | Yield |
---|---|
With sodium carbonate; tetrakis(triphenylphosphine) palladium(0) In methanol; water; toluene at 90℃; for 15h; Suzuki coupling; | 90% |
4-bromo-3-methylpyridine
N-cyclohexyl-2-bromobenzenecarboxamide
Conditions | Yield |
---|---|
With palladium(II) trifluoroacetate; norbornene; caesium carbonate; XPhos In toluene at 110℃; for 18h; Inert atmosphere; Sealed tube; | 85% |
Conditions | Yield |
---|---|
With tetrakis(triphenylphosphine) palladium(0) In toluene for 24h; Reflux; | 85% |
4-bromo-3-methylpyridine
trans-3-penten-2-one
Conditions | Yield |
---|---|
With copper(l) iodide; n-butyllithium; Dibutyl sulfide In diethyl ether; hexane at 20℃; for 1h; | 82% |
Conditions | Yield |
---|---|
With bis-triphenylphosphine-palladium(II) chloride In N,N-dimethyl-formamide at 70℃; for 3h; | 81% |
4-bromo-3-methylpyridine
Conditions | Yield |
---|---|
With tetrakis(triphenylphosphine) palladium(0); caesium carbonate In 1,4-dioxane; water at 100℃; Inert atmosphere; | 80% |
tert-butyl (2-(3-bromophenyl)propan-2-yl)carbamate
4-bromo-3-methylpyridine
Conditions | Yield |
---|---|
Stage #1: tert-butyl [2-(3-bromophenyl)propan-2-yl]carbamate With tetrahydroxydiboron; chloro(2-dicyclohexylphosphino-2’,4’,6’-triisopropyl-1,1‘-biphenyl)[2-(2’-amino-1,1‘-biphenyl’)]palladium(II); potassium acetate; XPhos In ethanol at 80℃; for 5h; Stage #2: 4-bromo-3-methylpyridine With potassium carbonate at 85℃; for 4h; | 79% |
Conditions | Yield |
---|---|
With bis-triphenylphosphine-palladium(II) chloride; caesium carbonate In 1,4-dioxane; water at 85℃; for 15h; Inert atmosphere; | 79% |
4-bromo-3-methylpyridine
3,3'-dimethyl-4,4'-bipyridyl
Conditions | Yield |
---|---|
With triphenylphosphine; nickel dichloride; zinc In N,N-dimethyl-formamide at 50℃; for 2h; | 67% |
4-bromo-3-methylpyridine
trimethylsilylacetylene
3-methyl-4-((trimethylsilyl)ethynyl)pyridine
Conditions | Yield |
---|---|
With copper(l) iodide; triethylamine In N,N-dimethyl-formamide at 20 - 110℃; for 24h; Sonogashira Cross-Coupling; | 67% |
crotonic acid methyl ester
4-bromo-3-methylpyridine
Conditions | Yield |
---|---|
With copper(l) iodide; n-butyllithium; Dibutyl sulfide In diethyl ether; hexane at 20℃; for 1h; | 65% |
4-bromo-3-methylpyridine
bis(pinacol)diborane
3-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine
Conditions | Yield |
---|---|
With potassium acetate; (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride In 1,4-dioxane at 110℃; Inert atmosphere; | 60% |
With (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; potassium acetate In 1,4-dioxane at 110℃; for 3h; Inert atmosphere; | 60% |
With (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; potassium acetate In 1,4-dioxane at 110℃; for 3h; Inert atmosphere; | 60.4% |
4-bromo-3-methylpyridine
Conditions | Yield |
---|---|
With dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II)*CH2Cl2; potassium carbonate In 1,4-dioxane; water at 100℃; for 16h; Suzuki Coupling; Inert atmosphere; | 56% |
4-bromo-3-methylpyridine
3,4-Dimethoxyphenylboronic acid
Conditions | Yield |
---|---|
With dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II)*CH2Cl2; sodium carbonate In ethanol; toluene at 110℃; for 19h; Inert atmosphere; Sealed tube; | 56% |
Conditions | Yield |
---|---|
Stage #1: 4-bromo-3-methylpyridine With n-butyllithium In tetrahydrofuran at -78℃; for 1h; Stage #2: Trimethyl borate In tetrahydrofuran at 20℃; | 56% |
2,6-dimethylbenzene boronic acid
4-bromo-3-methylpyridine
4-(2,6-dimethylphenyl)-3-methylpyridine
Conditions | Yield |
---|---|
With tetrakis(triphenylphosphine) palladium(0); potassium carbonate In tetrahydrofuran; water Reflux; | 52% |
4-bromo-3-methylpyridine
Conditions | Yield |
---|---|
Stage #1: C38H38BN3O4; 4-bromo-3-methylpyridine With tetrakis(triphenylphosphine) palladium(0); potassium carbonate In 1,4-dioxane; water at 90℃; for 16h; Inert atmosphere; Stage #2: With trifluoroacetic acid at 20℃; for 2h; | 51% |
With tetrakis(triphenylphosphine) palladium(0); potassium hydrogencarbonate In 1,4-dioxane; water at 90℃; for 16h; Inert atmosphere; | 51% |
[3-(3-ethyl-ureido)-5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-isoquinolin-8-ylmethyl]-carbamic acid 2-methoxy-ethyl ester
4-bromo-3-methylpyridine
[3-(3-ethyl-ureido)-5-(3-methyl-pyridin-4-yl)-isoquinolin-8-ylmethyl]-carbamic acid 2-methoxy-ethyl ester
Conditions | Yield |
---|---|
With potassium carbonate; tetrakis(triphenylphosphine) palladium(0) In 1,4-dioxane; water at 90℃; Suzuki Coupling; Inert atmosphere; | 42% |
4-bromo-3-methylpyridine
(imino-{4-[3-(3-methyl-pyridin-4-yl)-benzenesulfonyl]-5-methylsulfanyl-thiophen-2-yl}-methyl)-carbamic acid tert-butyl ester
Conditions | Yield |
---|---|
Pd(PPh3)4 In ethanol; sodium carbonate; ethyl acetate; toluene | 41% |
methyl 7-methoxy-2',3',5',6'-tetrahydrospiro[1,3-benzodioxole-2,4'-(4H)-thiopyran]-4-carboxylate
4-bromo-3-methylpyridine
2-(3-bromopyridine-4-yl)-1-(7-methoxy-2',3',5',6'-tetrahydrospiro[1,3-benzodioxole-2,4'-(4H)-thiopyran]-4-yl)ethanone
Conditions | Yield |
---|---|
Stage #1: methyl 7-methoxy-2',3',5',6'-tetrahydrospiro[1,3-benzodioxole-2,4'-(4H)-thiopyran]-4-carboxylate; 4-bromo-3-methylpyridine With lithium hexamethyldisilazane In tetrahydrofuran at 0 - 20℃; for 12h; Stage #2: With ammonium chloride In tetrahydrofuran; water | 40% |
4-bromo-3-methylpyridine
Conditions | Yield |
---|---|
Stage #1: 8-(benzyloxy)quinoline-5-sulfonyl chloride With triphenylphosphine In tetrahydrofuran at 60℃; for 0.833333h; Stage #2: 4-bromo-3-methylpyridine With tris-(dibenzylideneacetone)dipalladium(0); N-ethyl-N,N-diisopropylamine In 1,4-dioxane at 110℃; | 38% |
4-bromo-3-methylpyridine
Conditions | Yield |
---|---|
With copper(l) iodide; N,N,N,N,-tetramethylethylenediamine; potassium carbonate In 1,4-dioxane at 120℃; for 16h; | 25.4% |
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