DayangChem exported this product to many countries and regions at best price. If you are looking for the material's manufacturer or supplier in China, DayangChem is your best choice. Pls contact with us freely for getting detailed product spe
Cas:211235-87-9
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inquiryGood quality Good price Promptly delivery Appearance:White or off-white Solid Storage:Sealed, dry, microtherm , avoid light and smell. Package:According to the demand of customer Application:intermediate Transportation:Ac
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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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inquiryAnsciep 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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inquiry★.Best quality according to requirement ★.Competitive price in China market ★.Mature Technical support ★.Professional logistic support
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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
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inquiryWe are committed to providing our customers with the best products and services at the most competitive prices.Appearance:white powder Storage:Room temperature with sealed well Package:according to the clients requirement Application:Use as primary a
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inquiry2,3-Dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarbaldehydeAppearance:white crystalline powder Storage:Store in dry, dark and ventilated place Package:25KG drum Application:intermediate Transportation:by air, by sea, by express
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inquiry*stable and better quality products*efficient and meticulous servicesAppearance:Powder Storage:Store in dry, cool and ventilated place Package:10G/bottle 1kg/tin 5kg/tin 25kg/carton Application:1. Chemical raw materials 2. Used as an analytical reage
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inquiryhome-produced Application:medicine
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inquiryfactory?direct?saleAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:healing drugs Transportation:By sea Port:Shanghai/tianjin
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inquiryBetterbiochem is specialized in APIs, pharmaceutical intermediates & fine chemicals. 1. The best quality, competitive price. 2. The best service before or after shipment. 3. Rich experience in export operation. 4. Rich experience in
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inquiry1. Production capacity: we have three production base with high-tech production equipment and instruments, equipped with professional production personnel, meet your requirements.2. Quality assurance: we have a first-class testing equipment and testi
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inquiryFINETECH INDUSTRY LIMITED is a LONDON based CRO company providing drug discovery & development services to worldwide clients. FINETECH INDUSTRY LIMITED supplies the 2,3-Dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarbaldehyde, CAS:211235-87-9 with the mos
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inquiryHight quality, fast shipping, in stock or custom synthesis for the similar compound to meet your need. Storage:standard ambient conditions Package:1g, 5g, 10g, 25g, 50g,100g,500g,1kg,10kg Application:medical intermediate for R&D Transportation:FEDEX,
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inquiryHigh quality ,special structure, regular with stock , custom synthese ,quotation with 24hrsAppearance:Good Storage:G to KG to 100KG Application:With high quality for lab research or production in pharm or special material area . With stock or custom
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inquiryDebyesci is here who supplied several kinds of chemical products to global pharmaceutical, drug discovery, agrochemical and biotechnology industries for four yearsOur key scientific leadership team has gained experience in top research and developmen
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inquiry3,4-ethylenedioxythiophene-2,5-dicarbonitrile
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
With diisobutylaluminium hydride In toluene at 0℃; | 80% |
N,N-dimethyl-formamide
3,4-(ethylenedioxy)thiophene
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
Stage #1: 3,4-(ethylenedioxy)thiophene With n-butyllithium In tetrahydrofuran at -78 - 0℃; Inert atmosphere; Stage #2: N,N-dimethyl-formamide In tetrahydrofuran at -78 - 20℃; for 2h; Inert atmosphere; | 75% |
With n-butyllithium In tetrahydrofuran at -78 - 20℃; Formylation; | 72% |
With n-butyllithium In tetrahydrofuran at -78 - 20℃; | 62% |
With n-butyllithium | |
Stage #1: 3,4-(ethylenedioxy)thiophene With n-butyllithium In tetrahydrofuran at -78 - 0℃; for 0.333333h; Inert atmosphere; Stage #2: N,N-dimethyl-formamide In tetrahydrofuran at -78 - 0℃; for 2h; Inert atmosphere; |
2,5-di(hydroxymethyl)-3,4-ethylenedioxythiophene
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
With 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione In dimethyl sulfoxide at 20℃; for 96h; | 66% |
bromodichloromethane
3,4-(ethylenedioxy)thiophene
A
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
B
3,4-ethylenedioxythiophene-2-carboxaldehyde
Conditions | Yield |
---|---|
Stage #1: bromodichloromethane; 3,4-(ethylenedioxy)thiophene With 1,1'-bis-(diphenylphosphino)ferrocene; potassium phosphate; palladium diacetate; acetic anhydride; silver carbonate In acetonitrile at 60℃; for 48h; Schlenk technique; Inert atmosphere; Stage #2: With hydrogenchloride In dichloromethane at 30℃; Overall yield = 66 %; | A 43% B 22% |
N,N-dimethyl-formamide
3,4-ethylenedioxythiophene-2-carboxaldehyde
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
Stage #1: N,N-dimethyl-formamide; 3,4-ethylenedioxythiophene-2-carboxaldehyde With trichlorophosphate In 1,2-dichloro-ethane at 20℃; for 0.5h; Vilsmeier-Haack Formylation; Stage #2: In 1,2-dichloro-ethane at 80℃; for 5h; Vilsmeier-Haack Formylation; Stage #3: With hydrogenchloride In water at 20℃; Vilsmeier-Haack Formylation; | 21% |
N,N-dimethyl-formamide
3,4-(ethylenedioxy)thiophene
A
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
B
3,4-ethylenedioxythiophene-2-carboxaldehyde
Conditions | Yield |
---|---|
With n-butyllithium; potassium tert-butylate; lithium bromide 1.) THF, hexane, -90 deg C, 30 min, 2.) -90 deg c to room temperature; Yield given; Multistep reaction. Yields of byproduct given; |
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: potassium carbonate; tetrabutylammomium bromide / N,N-dimethyl-formamide / 135 °C / Inert atmosphere 2: diisobutylaluminium hydride / toluene / 0 °C View Scheme |
3,4-(ethylenedioxy)thiophene
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1.1: trichlorophosphate / 1,2-dichloro-ethane / 5 h / 80 °C 2.1: trichlorophosphate / 1,2-dichloro-ethane / 0.5 h / 20 °C 2.2: 5 h / 80 °C 2.3: 20 °C View Scheme |
1-Methyl-1-phenylhydrazine
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
3,4-ethylenedioxythiophene-2,5-dicarbaldehyde di(N-methyl-N-phenylhydrazone)
Conditions | Yield |
---|---|
In ethanol Reflux; | 85% |
N,N-diphenylhydrazine hydrochloride
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
3,4-ethylenedioxythiophene-2,5-dicarbaldehyde di(N,N-diphenylhydrazone)
Conditions | Yield |
---|---|
In ethanol Reflux; | 79% |
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
With toluene-4-sulfonic acid In chloroform; isopropyl alcohol for 24h; Inert atmosphere; Reflux; | 77% |
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
With toluene-4-sulfonic acid In chloroform for 72h; Reflux; Inert atmosphere; | 75% |
2-thienylmethyltriphenylphosphonium bromide
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
With sodium hydride In tetrahydrofuran at 20℃; for 10h; Condensation; Wittig; | 74% |
methyl (3,4,5-trimethoxyphenyl) ketone
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
With sodium hydroxide In ethanol; water for 1h; Reflux; | 74% |
2,5-diamino-thiophene-3,4-dicarboxylic acid diethyl ester
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
tetraethyl 5,5'-(1E,10E)-(2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-diyl)bis(methan-1-yl-1-ylidene)bis(azan-1-yl-1-ylidene)-bis(2-aminothiophene-3,4-dicarboxylate)
Conditions | Yield |
---|---|
With trifluoroacetic acid In ethanol at 20℃; for 16h; | 67% |
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
diethyl (5-hexylthiophen-2-yl)methylphosphonate
Conditions | Yield |
---|---|
With potassium tert-butylate In tetrahydrofuran at 20℃; for 1h; Wittig-Horner reaction; | 53% |
3-cyano-2-amino-4,5,6,7-tetrahydrobenzo[b]thiophene
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
With trifluoroacetic acid In ethanol at 40℃; for 16h; | 52% |
4-(N-isopropylamidino)-1,2-phenylene diamine
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
Stage #1: 4-(N-isopropylamidino)-1,2-phenylene diamine; 2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde With p-benzoquinone In ethanol for 4h; Reflux; Inert atmosphere; Stage #2: With hydrogenchloride In ethanol | 50.7% |
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
50% |
2-(3,4-diaminophenyl)-imidazoline
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
Stage #1: 2-(3,4-diaminophenyl)-imidazoline; 2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde With p-benzoquinone In ethanol for 4h; Reflux; Inert atmosphere; Stage #2: With hydrogenchloride In ethanol | 47.9% |
4-amidino-1,2-phenylenediamine
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
Stage #1: 4-amidino-1,2-phenylenediamine; 2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde With p-benzoquinone In ethanol for 4h; Reflux; Inert atmosphere; Stage #2: With hydrogenchloride In ethanol | 42.6% |
2-(Triphenyl-λ5-phosphanylidene)-[1,3]dithiole-4,5-dicarboxylic acid dimethyl ester
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
40% |
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
With potassium tert-butylate In tetrahydrofuran at -78℃; for 2h; Inert atmosphere; | 36% |
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
With potassium hydroxide In ethanol for 12h; Claisen-Schmidt Condensation; | 34% |
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
27% |
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
Stage #1: diethyl (3,4-ethylenedioxy-5-hexyl-2-thienyl)methylphosphonate With sodium hydride In N,N-dimethyl-formamide at 0℃; for 0.25h; Inert atmosphere; Stage #2: 2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde In N,N-dimethyl-formamide at 20℃; for 18h; Horner-Wadsworth-Emmons Olefination; Inert atmosphere; | 26% |
1,3-bis(dicyanomethylidene)-indane
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
2,5-diamino-thiophene-3,4-dicarboxylic acid diethyl ester
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
C28H30N4O10S3
Conditions | Yield |
---|---|
In ethanol Acidic conditions; |
diethyl 2-amino-5-benzamidothiophene-3,4-dicarboxylate
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
tetraethyl-5,5'-((1E,1'E)-((2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-diyl)bis(methanylylidene))bis(azanylylidene))bis(2-benzamidothiophene-3,4-dicarboxylate)
Conditions | Yield |
---|---|
With trifluoroacetic acid In ethanol at 20℃; Inert atmosphere; |
C17H19NO3
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
With acetic acid In ethanol for 4h; Reflux; Inert atmosphere; |
4-aminophenyl 4-(hexyloxy)benzoate
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
With acetic acid In ethanol for 4h; Reflux; Inert atmosphere; |
4-aminophenyl 4-octyloxybenzoate
2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxaldehyde
Conditions | Yield |
---|---|
With acetic acid In ethanol for 4h; Reflux; Inert atmosphere; |
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