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inquiryAs 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 according to the contract research and development services for t
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inquiryItems Standard Result Appearance Light gray or light brown crystalline powder Light grey crystalline powder Sol
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inquiryWelcome 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
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inquiryProduct description: Product name 3,4-Dihydroxybenzaldehyde CAS number 139-85-5 Assay ≥99% Appearance Yellowish powder Capacity 500mt/year Application Pharmaceutical and pes
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inquiry1.High quality : the purity is 99% min . through multiple producing procedures. 2.Competitive price : low price because of our skilled production technolpgy ,save the production cost at most , and give big profit room to our customers545.Safe and f
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inquiryCangzhou Enke Pharma Tech Co.,ltd. is located in Cangzhou City, Hebei province ,where is a famous petroleum chemical industry city in China. Enke Pharma a high-tech enterprise ,and we are dedicated to developing and manufacturing new ap
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inquiryShanghai Seasonsgreen Chemical is a high-tech research and development, production, sale and custom synthesis set in one high-tech chemical products enterprises. Our sales and marketing division is located in Shanghai, serving international pharmaceu
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inquiryWhy is SINOWAY: 1) Specialized in pharmaceutical and healthcare industrial for 34 years. 2) ISO 9001:2015 & SGS audited supplier . 3) Accept various payment terms : T.T 30-60 days. 4) We have warehouse in USA with quickly shipment . 5) We c
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inquiryHebei Yanxi Chemical Co., Ltd. is a professional research, development and production of lead acetate benzene acetamide enterprise backbone members by local well-known entrepreneurs and professional senior engineers in the party's "low car
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inquiryName:3,4-DIHYDROXYBENZALDEHYDE CAS NO:139-85-5 Grade:Medical scientific research and export Molecular formula: C7H6O3 Molecular weight:138.12 Product Quality 12 years of chemical raw materials Mature operation of the industry System stabil
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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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inquirySpecifications of our 3,4-Dihydroxybenzaldehyde CAS 139-85-5: Items Specifications Results Appearance Pale yellow to pale gray powder Conforms Assay ≥99% 99.82% Welcome to inquire us to get the
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inquiryWith 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 manufacturing
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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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inquiryOur 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
Chemical Name: Protocatechualdehyde CAS No.: 139-85-5 Molecular Fomula: C7H6O3 Chemical Structure: Molecular weight: 138.12 Appearance: powder Appearance:Slightly Brown Powder Storage:Store in cool and dry place, away from sun light. Pac
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inquiryAdvantages: Hubei XinRunde Chemical Co., Ltd is a renowned pharmaceutical manufacturer. We can offer high quality products at competitive price in quick delivery with 100% custom pass guaranteed. Never stop striving to offer our best s
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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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inquiryWe can provide GMP validation service that complies with SFDA, FDA, WHO and EU EMPA.Excellent registration team could help us easlily to register our products in different countries.If you and your customer are interested in some products or need C
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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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inquiryProtocatechualdehydeCAS: 139-85-5 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 organic interm
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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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inquiryProtocatechualdehyde CAS:139-85-5 Specification Items Specification Product name 3,4-dihydroxybenzaldehyde CAS# 139-85-5 Appearance
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
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inquiryConditions | Yield |
---|---|
With boron tribromide In dichloromethane at 4℃; for 1h; | 100% |
With boron tribromide-dimethyl sulfide complex In 1,2-dichloro-ethane at 83.5℃; for 0.1h; | 99.3% |
Stage #1: vanillin With boron tribromide-dimethyl sulfide complex In dichloromethane at 0 - 20℃; Inert atmosphere; Stage #2: With water In methanol; dichloromethane at 0℃; for 0.166667h; Inert atmosphere; | 99% |
Conditions | Yield |
---|---|
Stage #1: isovanillin With pyridine; iodine; aluminium In acetonitrile for 18h; Reflux; Stage #2: With hydrogenchloride In water; acetonitrile at 20℃; | 99% |
With aluminium(III) iodide In dimethyl sulfoxide; acetonitrile at 80℃; for 18h; | 95% |
With aluminium(III) iodide; dimethyl sulfoxide In acetonitrile at 80℃; for 18h; | 95% |
Conditions | Yield |
---|---|
With boron trichloride - methyl sulfide complex In 1,2-dichloro-ethane at 83.5℃; for 29.5h; other reagent; | 98.5% |
With aluminium(III) iodide; tetra-(n-butyl)ammonium iodide In cyclohexane for 1.5h; Heating; | 84% |
With titanium tetrachloride In dichloromethane at -20 - -10℃; for 4h; Inert atmosphere; | 68.4% |
Conditions | Yield |
---|---|
With toluene-4-sulfonic acid In neat (no solvent, solid phase) at 20℃; for 0.583333h; Green chemistry; | 98% |
2-iodoisovanillin
3,4-dihydroxybenzaldehyde
Conditions | Yield |
---|---|
In [(2)H6]acetone; dichloromethane | 96.1% |
Conditions | Yield |
---|---|
With aluminium(III) iodide In dimethyl sulfoxide; acetonitrile at 80℃; for 18h; | 96% |
With aluminium(III) iodide; dimethyl sulfoxide In acetonitrile at 80℃; for 18h; | 95% |
With aluminium(III) iodide; calcium oxide In acetonitrile at 80℃; for 18h; | 93% |
Conditions | Yield |
---|---|
With dipotassium peroxodisulfate In water at 90℃; for 12h; Green chemistry; | 63% |
Conditions | Yield |
---|---|
62.4% |
Conditions | Yield |
---|---|
With 1-methyl-pyrrolidin-2-one; potassium carbonate; thiophenol for 0.25h; Heating; | A 58% B 20% |
Conditions | Yield |
---|---|
Stage #1: 3-hydroxy-4-methoxybenzyl alcohol With 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione In tetrahydrofuran at 20℃; Darkness; Stage #2: With sodium dithionite; water In tetrahydrofuran Darkness; | 56% |
3,4-dihydroxy-5-iodobenzaldehyde
3,4-dihydroxybenzaldehyde
Conditions | Yield |
---|---|
With silver; sodium hydrogencarbonate; sodium iodide; zinc In 1,2-dimethoxyethane; dimethyl sulfoxide at 80℃; for 6h; | 27% |
methanol
caffeic acid
A
3,4-Dihydroxybenzoic acid
B
3,4-dihydroxybenzaldehyde
Conditions | Yield |
---|---|
With acetate buffer; sodium nitrite at 20℃; for 4h; pH=4; Further byproducts.; | A 6% B 9% C 10% D 5% |
D-erythrose
A
5-hydroxymethyl-2-furfuraldehyde
B
3,4-Dihydroxybenzoic acid
C
1-(3,4-dihydroxyphenyl)ethan-1-one
D
1-[5-(hydroxymethyl)furan-2-yl]ethan-1-one
E
3,4-dihydroxybenzaldehyde
F
3-methylbenzene-1,2-diol
Conditions | Yield |
---|---|
With acetate buffer for 45h; Product distribution; Heating; | A 0.04% B 0.03% C 0.01% D 0.15% E 0.01% F 0.03% |
N-Bromosuccinimide
piperonal
chloroform
A
6-bromopiperonylic acid
B
6-bromo-3,4-methylenedioxybenzaldehyde
C
3,4-dihydroxybenzaldehyde
Conditions | Yield |
---|---|
auch unter Zusatz von Dibenzoylperoxid; |
5-dichloromethyl-benzo[1,3]dioxol-2-one
3,4-dihydroxybenzaldehyde
Conditions | Yield |
---|---|
With water | |
With diluted acids |
1-methyl-4-nitrosobenzene
3-bromo-4-hydroxybenzylaldehyde
A
3,4-Dihydroxybenzoic acid
B
4-hydroxy-benzaldehyde
C
3,4-dihydroxybenzaldehyde
D
4-hydroxy-benzoic acid
Conditions | Yield |
---|---|
at 160℃; | |
at 190℃; |
4-hydroxy-3-(methoxymethoxy)benzaldehyde
3,4-dihydroxybenzaldehyde
Conditions | Yield |
---|---|
With sodium hydrogensulfite und anschliessendes Erhitzen mit wss.H2SO4; | |
With methanol; mineral acid |
Conditions | Yield |
---|---|
With p-dimethylaminonitrosobenzene |
Conditions | Yield |
---|---|
With sodium hydroxide; dihydrogen peroxide |
Conditions | Yield |
---|---|
at 150 - 200℃; unter Druck; |
Conditions | Yield |
---|---|
With potassium carbonate In N,N-dimethyl-formamide at 120℃; for 15h; | 100% |
With potassium carbonate In N,N-dimethyl-formamide at 120℃; for 15h; | 99% |
With potassium carbonate In N,N-dimethyl-formamide at 20 - 130℃; for 4h; | 96% |
tert-butyldimethylsilyl chloride
3,4-dihydroxybenzaldehyde
3,4-bis(tert-butyldimethylsilanyloxy)benzaldehyde
Conditions | Yield |
---|---|
With 1H-imidazole In N,N-dimethyl-formamide | 100% |
With 1H-imidazole; dmap In N,N-dimethyl-formamide at 20℃; for 1h; | 99% |
With 1H-imidazole In dichloromethane | 98% |
Conditions | Yield |
---|---|
With potassium carbonate In N,N-dimethyl-formamide at 20℃; for 20h; Williamson ether synthesis; | 100% |
With potassium carbonate; potassium iodide In dichloromethane at 90℃; for 16h; Inert atmosphere; | 97% |
Stage #1: 3,4-dihydroxybenzaldehyde With potassium carbonate In N,N-dimethyl-formamide for 0.166667h; Stage #2: 1-bromo dodecane In N,N-dimethyl-formamide at 100℃; for 12h; | 91% |
Conditions | Yield |
---|---|
With potassium carbonate In N,N-dimethyl-formamide at 20℃; for 1h; | 100% |
With potassium carbonate; sodium iodide In N,N-dimethyl-formamide at 60℃; for 2h; | 98% |
With potassium carbonate; sodium iodide In N,N-dimethyl-formamide at 60℃; for 2h; | 98% |
3,4-dihydroxybenzaldehyde
3,4-dihydroxybenzonitrile
Conditions | Yield |
---|---|
With hydroxylamine hydrochloride In 1-methyl-pyrrolidin-2-one at 100℃; for 0.5h; | 100% |
With 1-methyl-pyrrolidin-2-one; hydroxylamine hydrochloride at 100℃; for 0.25h; Condensation; microwave irradiation; | 89% |
With formic acid; hydroxylamine hydrochloride; silica gel for 0.0166667h; Irradiation; | 70 % Chromat. |
1,3,5-tris(3-aminopropyl)adamantane
3,4-dihydroxybenzaldehyde
N,N′,N′′-tris(3,4-dihydroxybenzylidene)adamantane-1,3,5-tripropaneamine
Conditions | Yield |
---|---|
In ethanol for 24h; Inert atmosphere; | 100% |
dimedone
malononitrile
3,4-dihydroxybenzaldehyde
2-amino-4-(3,4-dihydroxyphenyl)-7,7-dimethyl-5-oxo-5,6,7,8-tetrahydro-4H-chromene-3-carbonitrile
Conditions | Yield |
---|---|
With horsetail plant ash In neat (no solvent) at 20℃; for 0.25h; Catalytic behavior; Reagent/catalyst; | 100% |
With 1,4-diaza-bicyclo[2.2.2]octane In 1,4-dioxane for 1.5h; Reflux; | 97% |
With 1-methylimidazolium tricyanomethanide In neat (no solvent) at 20℃; for 0.333333h; Green chemistry; | 92% |
With potassium carbonate In water at 20℃; for 1.16667h; Green chemistry; | 82% |
With dmap at 150℃; for 0.333333h; Microwave irradiation; | 57% |
hydrogen cyanide
3,4-dihydroxybenzaldehyde
(R)-3,4-dihydroxymandelonitrile
Conditions | Yield |
---|---|
With (R)-hydroxynitrile lyase from Prunus amygdalus turcomanica Lincz immobilized onto Eupergit CM In tert-butyl methyl ether; dimethyl sulfoxide at 5℃; for 72h; pH=4; Reagent/catalyst; Enzymatic reaction; enantioselective reaction; | 100% |
Conditions | Yield |
---|---|
Stage #1: ethyl acetoacetate With hydrazine hydrate; C10H21N2(1+)*C2H3O2(1-) at 60℃; for 0.0833333h; Stage #2: malononitrile; 3,4-dihydroxybenzaldehyde In acetonitrile at 20 - 25℃; for 0.5h; Reagent/catalyst; Temperature; | 100% |
With hydrazine hydrate In ethanol; water for 0.666667h; Reflux; Green chemistry; | 82% |
3,4-dihydroxybenzaldehyde
Conditions | Yield |
---|---|
With ammonium acetate; acetic acid Reflux; | 100% |
BARBITURIC ACID
3,4-dihydroxybenzaldehyde
5-(3,4-dihydroxybenzylidene)-2,4,6(1H,3H,5H)-pyrimidinetrione
Conditions | Yield |
---|---|
In ethanol; water at 80℃; for 8h; | 99.3% |
In ethanol; water at 80℃; for 8h; | 99.3% |
With ammonium chloride In water at 20℃; for 0.5h; | 94% |
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