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
Cas:1514-82-5
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inquiryThe 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
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inquiry1. 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
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inquiryProduct Name: 2-BROMO-3,3,3-TRIFLUOROPROPENE Synonyms: 2-BROMO-3,3,3-TRIFLUORO-1-PROPENE;2-BROMO-3,3,3-TRIFLUOROPROP-1-ENE;2-BROMO-3,3,3-TRIFLUOROPROPENE;2-Bromo-3,3,3-Trifluoropropane;2-Bromo-3,3,3-trifluoroprop-1-ene 98%;2-Bromo-3,3,
Cas:1514-82-5
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inquiryWITH 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
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inquiry2-BROMO-3,3,3-TRIFLUOROPROPENE Basic information Product Name: 2-BROMO-3,3,3-TRIFLUOROPROPENE CAS: 1514-82-5 MF: C3H2BrF3 MW: 174.95 EINECS: 627-872-0 Appearance:Colorless cl
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inquiryOur Advantage Rich Experience Our products are sold all over Europe,North&South America, Sino-East, Asia and pacific area as well as Africa,we establish long term. Quality service Company cooperates with research institutes. We strictly con
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inquiryOur company has been in existence for 10 years since its establishment. We have our own unique team. The company integrates independent research and development, production and sales. We have established famous brands at home and abroad. At prese
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inquiry2-BROMO-3,3,3-TRIFLUOROPROPENE CAS:1514-82-5 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 org
Cas:1514-82-5
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inquiryHello, 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
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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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inquiryHangzhou 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
Cas:1514-82-5
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inquiryJ&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
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inquiryour strengths: 1: Fast and guaranteed shipment (TNT;EMS;FEDEX;DHL;UPS;EUB, special line) 2: Various payment items accepted (Btc; MoneyGram; WU) 3: Valued package (Paraffin coating; Double aluminum foil bag; Vacuum packaging) 4: Efficient delivery
Cas:1514-82-5
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inquiryZibo 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
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inquiryProduct name: 2-Bromo-3,3,3-Trifluoropropene CAS No.:1514-82-5 Molecule Formula:C3H2BrF3 Molecule Weight:174.94 Purity: 99.0% Package: 200kg/drum Description:Colorless transparent liquid Manufacture Standards:Enterprise Standard
Cas:1514-82-5
Min.Order:1 Kilogram
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inquiryProduct Name: 2-BROMO-3,3,3-TRIFLUOROPROPENE CAS: 1514-82-5 MF: C3H2BrF3 MW: 174.95 EINECS: 627-872-0 Mol File: 1514-82-5.mol 2-BROMO-3,3,3-TRIFLUOROPROPENE Structure 2-BROMO-3,3,3-TRIFLUOROPROPENE Chemical Properties Boiling poin
Cas:1514-82-5
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inquiryfactory?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
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inquiryFandachem is China-based top1 exporter and supplier of 2-Bromo-3,3,3-trifluoropropene cas:1514-82-5,please contact for price of 2-Bromo-3,3,3-trifluoropropene cas:1514-82-5 and also you can send us email to get Certificate of Analysis(COA), Technic
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inquiryShandong 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
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inquiry1.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
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inquiryConditions | Yield |
---|---|
With potassium hydroxide | 93% |
With potassium hydroxide In ethanol at -10℃; | 91% |
With Aliquat 336; sodium hydroxide at 50 - 70℃; | 80.46% |
Conditions | Yield |
---|---|
With antimonypentachloride; antimony(III) fluoride |
Conditions | Yield |
---|---|
With potassium hydroxide |
(2-bromo-3,3,3-trifluoro-propyl)-bis-trifluoromethyl-amine
2-bromo-3,3,3-trifluoropropene
Conditions | Yield |
---|---|
With potassium hydroxide |
2-bromo-3-chloro-3,3-difluoro-propene
antimony(III) fluoride
1,2-dichloro-ethane
2-bromo-3,3,3-trifluoropropene
2-bromo-3,3,3-trichloro-propene
antimony(III) fluoride
1,2-dichloro-ethane
2-bromo-3,3,3-trifluoropropene
1,2-Dibromo-3,3,3-trifluoropropane
A
3,3,3-trifluoroprop-1-yne
B
2-bromo-3,3,3-trifluoropropene
Conditions | Yield |
---|---|
at -5℃; |
1,2-Dibromo-3,3,3-trifluoropropane
A
3,3,3-trifluoroprop-1-yne
B
2-bromo-3,3,3-trifluoropropene
3-acetoxy-2-bromo-1,1,1-trifluoropropane
A
1,1,1-trifluoro-2,3-epoxypropane
B
2-bromo-3,3,3-trifluoropropene
Conditions | Yield |
---|---|
With sodium hydroxide In water at 100℃; Title compound not separated from byproducts.; |
2-bromo-1,1,1-trifluoropropan-3-ol
A
1,1,1-trifluoro-2,3-epoxypropane
B
2-bromo-3,3,3-trifluoropropene
Conditions | Yield |
---|---|
With sodium hydroxide In water at 0 - 95℃; |
2-bromo-3,3,3-trifluoropropene
cyclohexanecarbaldehyde
1-Cyclohexyl-4,4,4-trifluoro-2-butyn-1-ol
Conditions | Yield |
---|---|
Stage #1: 2-bromo-3,3,3-trifluoropropene With n-butyllithium; N-ethyl-N,N-diisopropylamine In tetrahydrofuran; hexane at -78℃; for 0.333333h; Inert atmosphere; Stage #2: cyclohexanecarbaldehyde In tetrahydrofuran; hexane at -78℃; for 1h; Inert atmosphere; | 100% |
With lithium diisopropyl amide In tetrahydrofuran 1.) -78 deg C, 5 min, 2.) 30 min; | 93.3% |
With lithium diisopropyl amide In tetrahydrofuran; cyclohexane 1.) -78 deg C, 10 min, 2.) -78 deg C, 1 h; | 90% |
Conditions | Yield |
---|---|
Stage #1: 2-bromo-3,3,3-trifluoropropene With n-butyllithium; N-ethyl-N,N-diisopropylamine In tetrahydrofuran; hexane at -78℃; for 0.333333h; Inert atmosphere; Stage #2: heptanal In tetrahydrofuran; hexane at -78℃; for 1h; Inert atmosphere; | 100% |
With lithium diisopropyl amide In tetrahydrofuran at -78℃; for 0.5h; | 90% |
With lithium diisopropyl amide In tetrahydrofuran at -78℃; for 3h; |
(E)-3-phenylpropenal
2-bromo-3,3,3-trifluoropropene
(E)-6,6,6-Trifluoro-1-phenyl-1-hexen-4-yn-3-ol
Conditions | Yield |
---|---|
With lithium diisopropyl amide In tetrahydrofuran 1.) -78 deg C, 5 min, 2.) 30 min; | 99% |
3-phenyl-propionaldehyde
2-bromo-3,3,3-trifluoropropene
6,6,6-Trifluoro-1-phenyl-4-hexyn-3-ol
Conditions | Yield |
---|---|
With lithium diisopropyl amide In tetrahydrofuran 1.) -78 deg C, 5 min, 2.) 30 min; | 99% |
With lithium diisopropyl amide In tetrahydrofuran at -78℃; for 0.5h; | 99% |
Stage #1: 2-bromo-3,3,3-trifluoropropene With lithium diisopropyl amide In tetrahydrofuran; hexane at -80℃; for 0.0833333h; Stage #2: 3-phenyl-propionaldehyde In tetrahydrofuran; hexane at -80℃; for 1.5h; | 89% |
Stage #1: 2-bromo-3,3,3-trifluoropropene With n-butyllithium; N-ethyl-N,N-diisopropylamine In tetrahydrofuran; hexane at -78℃; for 0.333333h; Inert atmosphere; Stage #2: 3-phenyl-propionaldehyde In tetrahydrofuran; hexane at -78℃; for 1h; Inert atmosphere; | 80% |
2-bromo-3,3,3-trifluoropropene
cyclohexanone
1-(3,3,3-trifluoro-1-propynyl)-1-cyclohexanol
Conditions | Yield |
---|---|
With lithium diisopropyl amide In tetrahydrofuran 1.) -78 deg C, 5 min, 2.) 30 min; | 99% |
Stage #1: 2-bromo-3,3,3-trifluoropropene With n-butyllithium; N-ethyl-N,N-diisopropylamine In tetrahydrofuran; hexane at -78℃; for 0.333333h; Inert atmosphere; Stage #2: cyclohexanone In tetrahydrofuran; hexane at -78℃; for 1h; Inert atmosphere; | 96% |
Stage #1: 2-bromo-3,3,3-trifluoropropene With lithium diisopropyl amide In tetrahydrofuran; hexane; cyclohexane at -78 - 20℃; Stage #2: cyclohexanone In tetrahydrofuran; hexane; cyclohexane at -78℃; for 1h; | 94% |
Stage #1: 2-bromo-3,3,3-trifluoropropene With lithium hexamethyldisilazane In tetrahydrofuran at -78 - 0℃; Stage #2: cyclohexanone In tetrahydrofuran at 0℃; | 90% |
2-bromo-3,3,3-trifluoropropene
4-tolyl iodide
1-(p-methylphenyl)-3,3,3-trifluoropropyne
Conditions | Yield |
---|---|
Stage #1: 2-bromo-3,3,3-trifluoropropene With dichloro(N,N,N’,N‘-tetramethylethylenediamine)zinc; lithium diisopropyl amide In tetrahydrofuran; hexane at -78 - 20℃; for 1h; Stage #2: 4-tolyl iodide With tetrakis(triphenylphosphine) palladium(0) In tetrahydrofuran; hexane for 6h; Heating; | 99% |
2-bromo-3,3,3-trifluoropropene
para-iodoanisole
1-(p-methoxyphenyl)-3,3,3-trifluoropropyne
Conditions | Yield |
---|---|
Stage #1: 2-bromo-3,3,3-trifluoropropene With dichloro(N,N,N’,N‘-tetramethylethylenediamine)zinc; lithium diisopropyl amide In tetrahydrofuran; hexane at -78 - 20℃; for 1h; Stage #2: para-iodoanisole With tetrakis(triphenylphosphine) palladium(0) In tetrahydrofuran; hexane for 6h; Heating; | 99% |
2-Ethylbutyraldehyde
2-bromo-3,3,3-trifluoropropene
5-ethyl-1,1,1-trifluoro-2-heptyn-4-ol
Conditions | Yield |
---|---|
Stage #1: 2-bromo-3,3,3-trifluoropropene With n-butyllithium; N-ethyl-N,N-diisopropylamine In tetrahydrofuran; hexane at -78℃; for 0.333333h; Inert atmosphere; Stage #2: 2-Ethylbutyraldehyde In tetrahydrofuran; hexane at -78℃; for 1h; Inert atmosphere; | 99% |
2-bromo-3,3,3-trifluoropropene
benzaldehyde
1-phenyl-4,4,4-trifluorobut-2-yn-1-ol
Conditions | Yield |
---|---|
With lithium diisopropyl amide In tetrahydrofuran 1.) -78 deg C, 5 min, 2.) 30 min; | 98.9% |
With lithium diisopropyl amide In tetrahydrofuran; cyclohexane 1.) -78 deg C, 10 min, 2.) -78 deg C, 1 h; | 95% |
Stage #1: 2-bromo-3,3,3-trifluoropropene With lithium diisopropyl amide In tetrahydrofuran; hexane; cyclohexane at -78 - 20℃; Stage #2: benzaldehyde In tetrahydrofuran; hexane; cyclohexane at -78℃; for 1h; | 93% |
benzophenone
2-bromo-3,3,3-trifluoropropene
1,1-Diphenyl-4,4,4-trifluorobut-2-yn-1-ol
Conditions | Yield |
---|---|
With lithium diisopropyl amide In tetrahydrofuran; cyclohexane 1.) -78 deg C, 10 min, 2.) -78 deg C, 1 h; | 98% |
Stage #1: 2-bromo-3,3,3-trifluoropropene With lithium diisopropyl amide In tetrahydrofuran; hexane; cyclohexane at -78 - 20℃; Stage #2: benzophenone In tetrahydrofuran; hexane; cyclohexane at -78℃; for 1h; | 94% |
Conditions | Yield |
---|---|
Stage #1: 2-bromo-3,3,3-trifluoropropene With lithium diisopropyl amide In tetrahydrofuran; hexane at -80℃; for 0.0833333h; Stage #2: tridecanal In tetrahydrofuran; hexane at -80℃; for 1.5h; | 98% |
2-bromo-3,3,3-trifluoropropene
N-phenylbenzohydrazonoyl chloride
Conditions | Yield |
---|---|
With 1,4-diaza-bicyclo[2.2.2]octane In 5,5-dimethyl-1,3-cyclohexadiene at 20℃; for 24h; Reagent/catalyst; Solvent; regioselective reaction; | 98% |
With 1,4-diaza-bicyclo[2.2.2]octane In 5,5-dimethyl-1,3-cyclohexadiene at 20℃; for 24h; Reagent/catalyst; Solvent; | 98% |
2-bromo-3,3,3-trifluoropropene
(3,5-dichlorophenyl)boronic acid
1,3-dichloro-5-(3,3,3-trifluoroprop-1-en-2-yl)benzene
Conditions | Yield |
---|---|
With potassium carbonate; (1,4-naphthoquinone)-[1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene]palladium(0) In 1,4-dioxane; water at 90℃; for 5h; Product distribution / selectivity; Inert atmosphere; | 97.8% |
With (1,1'-bis(diphenylphosphino)ferrocene)palladium(II) dichloride; potassium carbonate In tetrahydrofuran; water at 70℃; for 4h; Sealed tube; | 85% |
With potassium carbonate; bis-triphenylphosphine-palladium(II) chloride In tetrahydrofuran; water at 0 - 90℃; for 6h; Sealed tube; | 83% |
2-bromo-3,3,3-trifluoropropene
N-benzylidenebenzamide
Conditions | Yield |
---|---|
Stage #1: 2-bromo-3,3,3-trifluoropropene With sec.-butyllithium In diethyl ether; cyclohexane at -105℃; for 0.166667h; Stage #2: N-benzylidenebenzamide In diethyl ether; cyclohexane at -105 - -50℃; for 2h; | 97% |
Stage #1: 2-bromo-3,3,3-trifluoropropene; N-benzylidenebenzamide With sec.-butyllithium In diethyl ether; cyclohexane at -105℃; for 0.166667h; Inert atmosphere; Stage #2: With boron trifluoride diethyl etherate In diethyl ether; cyclohexane at -105 - -50℃; for 2h; Inert atmosphere; Stage #3: With water In diethyl ether; cyclohexane pH=7; aq. phosphate buffer; | 97% |
2-bromo-3,3,3-trifluoropropene
2-Phenylpropanal
Conditions | Yield |
---|---|
With lithium diisopropyl amide In tetrahydrofuran 1.) -78 deg C, 5 min, 2.) 30 min; | 96.5% |
iodobenzene
2-bromo-3,3,3-trifluoropropene
3,3,3-trifluoro-2-phenylpropene
Conditions | Yield |
---|---|
With chloro-trimethyl-silane; N,N,N,N,-tetramethylethylenediamine; silver; zinc In tetrahydrofuran multistep reaction; other aryl halides; | 96% |
With chloro-trimethyl-silane; N,N,N,N,-tetramethylethylenediamine; silver; zinc; tetrakis(triphenylphosphine) palladium(0) 1) THF, 60 deg C, 9 h, 2) 45 deg C, 6 h; Yield given. Multistep reaction; |
methanol
2-bromo-3,3,3-trifluoropropene
(Z)-1-Methoxy-3,3,3-trifluoroprop-1-ene
Conditions | Yield |
---|---|
With potassium hydroxide for 1h; | 96% |
ethanol
2-bromo-3,3,3-trifluoropropene
(Z)-1-ethoxy-3,3,3-trifluoroprop-1-ene
Conditions | Yield |
---|---|
With potassium hydroxide for 1h; | 96% |
With potassium hydroxide for 1h; | 95% |
Stage #1: 2-bromo-3,3,3-trifluoropropene With potassium hydroxide In water Stage #2: ethanol In water | 95% |
Conditions | Yield |
---|---|
With lithium diisopropyl amide In tetrahydrofuran; cyclohexane 1.) -78 deg C, 10 min, 2.) -78 deg C, 1 h; | 96% |
2-bromo-3,3,3-trifluoropropene
N-(2,2-dimethylpropylidene)-p-toluenesulfonamide
Conditions | Yield |
---|---|
Stage #1: 2-bromo-3,3,3-trifluoropropene With sec.-butyllithium In diethyl ether; cyclohexane at -105℃; for 0.166667h; Stage #2: N-(2,2-dimethylpropylidene)-p-toluenesulfonamide In diethyl ether; cyclohexane at -105 - -50℃; for 2h; | 96% |
Stage #1: 2-bromo-3,3,3-trifluoropropene; N-(2,2-dimethylpropylidene)-p-toluenesulfonamide With sec.-butyllithium In diethyl ether; cyclohexane at -105℃; for 0.166667h; Inert atmosphere; Stage #2: With boron trifluoride diethyl etherate In diethyl ether; cyclohexane at -105 - -50℃; for 2h; Inert atmosphere; Stage #3: With water In diethyl ether; cyclohexane pH=7; aq. phosphate buffer; | 96% |
2-bromo-3,3,3-trifluoropropene
benzaldehyde p-toluenesulfonylhydrazone
3-(trifluoromethyl)-5-phenylpyrazole
Conditions | Yield |
---|---|
With 1,8-diazabicyclo[5.4.0]undec-7-ene In toluene at 60℃; for 6h; | 96% |
2-bromo-3,3,3-trifluoropropene
4-Ethynylaniline
Conditions | Yield |
---|---|
With bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide; triethylamine at 50℃; Inert atmosphere; Schlenk technique; | 96% |
With bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide; triethylamine at 50℃; Inert atmosphere; Schlenk technique; |
2-bromo-3,3,3-trifluoropropene
benzaldehyde
1-phenyl-2-(trifluoromethyl)-2-propen-1-ol
Conditions | Yield |
---|---|
With copper(l) chloride; zinc In N,N-dimethyl-formamide 1.) 20 deg C, 4 h, 2.) 50 deg C, 8h; | 95% |
Stage #1: 2-bromo-3,3,3-trifluoropropene With sec.-butyllithium In diethyl ether; cyclohexane at -105℃; for 0.166667h; Stage #2: benzaldehyde In diethyl ether; cyclohexane at -105 - -50℃; for 2h; | 73% |
Stage #1: 2-bromo-3,3,3-trifluoropropene With sec.-butyllithium In diethyl ether; cyclohexane at -105℃; for 0.166667h; Inert atmosphere; Stage #2: benzaldehyde In diethyl ether; cyclohexane at -105 - -50℃; for 2h; Inert atmosphere; Stage #3: With water In diethyl ether; cyclohexane pH=7; aq. phosphate buffer; | 73% |
2-bromo-3,3,3-trifluoropropene
4-chlorobenzaldehyde
1-(4-Chloro-phenyl)-2-trifluoromethyl-prop-2-en-1-ol
Conditions | Yield |
---|---|
With copper(l) chloride; zinc In N,N-dimethyl-formamide 1.) 20 deg C, 4 h, 2.) 50 deg C, 5h; | 95% |
With zinc In tetrahydrofuran; pyridine at 50℃; Schlenk technique; Inert atmosphere; |
2-bromo-3,3,3-trifluoropropene
trimethylsilylacetylene
(3-trifluoromethyl-but-3-en-1-ynyl)trimethylsilane
Conditions | Yield |
---|---|
With bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide; tributyl-amine at 60℃; for 4h; | 95% |
2-bromo-3,3,3-trifluoropropene
1-((3S,10R,13S,17S)-10,13-dimethyl-3-((tetrahydro-2H-pyran-2-yl)oxy)-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl)ethanone
Conditions | Yield |
---|---|
With lithium diisopropyl amide In tetrahydrofuran; cyclohexane 1.) -78 deg C, 10 min, 2.) -78 deg C, 1 h; | 95% |
2-bromo-3,3,3-trifluoropropene
3-methoxy-1-iodobenzene
1-methoxy-3-(3,3,3-trifluoroprop-1-yn-1-yl)benzene
Conditions | Yield |
---|---|
Stage #1: 2-bromo-3,3,3-trifluoropropene With dichloro(N,N,N’,N‘-tetramethylethylenediamine)zinc; lithium diisopropyl amide In tetrahydrofuran; hexane at -78 - 20℃; for 1h; Stage #2: 3-methoxy-1-iodobenzene With tetrakis(triphenylphosphine) palladium(0) In tetrahydrofuran; hexane for 6h; Heating; | 95% |
2-bromo-3,3,3-trifluoropropene
N-cyclohexylidenebenzylamine N-oxide
N-benzyl-N-(1-cyclohexyl-4,4,4-trifluorobut-2-ynyl)hydroxylamine
Conditions | Yield |
---|---|
Stage #1: 2-bromo-3,3,3-trifluoropropene With lithium diisopropyl amide In tetrahydrofuran at -78℃; Stage #2: N-cyclohexylidenebenzylamine N-oxide In tetrahydrofuran at -20℃; for 2h; | 95% |
2-bromo-3,3,3-trifluoropropene
3-phenylsydnone
Conditions | Yield |
---|---|
With 1,10-Phenanthroline; copper(II) bis(trifluoromethanesulfonate); 1,8-diazabicyclo[5.4.0]undec-7-ene In acetonitrile at 35℃; for 4h; Catalytic behavior; Reagent/catalyst; Solvent; Temperature; Inert atmosphere; regioselective reaction; | 95% |
2-bromo-3,3,3-trifluoropropene
tert-butyl (2R)-2-[chloro(hydroxyimino)methyl]pyrrolidine-1-carboxylate
Conditions | Yield |
---|---|
With sodium hydrogencarbonate In ethyl acetate at 20℃; regioselective reaction; | 95% |
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