Products

Refine

Country

Business Type

Certificate

Display

Dayang Chem (Hangzhou) Co.,Ltd.

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

Dehydroascorbic acid

Cas:490-83-5

Min.Order:1 Kilogram

FOB Price: $3.0

Type:Lab/Research institutions

inquiry

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

Natural Extract 98% DEHYDROASCORBIC ACID 490-83-5 HACCP Manufacturer

Cas:490-83-5

Min.Order:1 Gram

FOB Price: $0.1

Type:Manufacturers

inquiry

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

L-(+)-1-Dehydroascorbic acid

Cas:490-83-5

Min.Order:5 Kiloliter

FOB Price: $1.2 / 5.0

Type:Manufacturers

inquiry

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 490-83-5 with competitive price

Cas:490-83-5

Min.Order:1 Kilogram

FOB Price: $139.0 / 210.0

Type:Trading Company

inquiry

Hebei Sankai Chemical Technology Co., Ltd

1. Product advantages High purity, all above 98.5%, no impurities after dissolution We will test each batch to ensure quality OEM and private brand services designed for free Various cap colors available We can also provide MT1 peptide powd

DEHYDROASCORBIC ACID

Cas:490-83-5

Min.Order:1 Kilogram

FOB Price: $80.0 / 89.0

Type:Trading Company

inquiry

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

L-threo-2,3-Hexodiulosonicacid, g-lactone 490-83-5

Cas:490-83-5

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

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

L-threo-2,3-Hexodiulosonicacid, g-lactone

Cas:490-83-5

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

HANGZHOU YUNUO CHEMICAL CO.,LTD

superior quality Appearance:Orange Solid Storage:Stored in cool, dry and ventilation place; Away from fire and heat Package:1kg/bag, 1kg/drum or 25kg/drum or as per your request. Application:The reversibly oxidized form of ascorbic acid. Transporta

L-threo-2,3-Hexodiulosonicacid, g-lactone

Cas:490-83-5

Min.Order:1 Metric Ton

Negotiable

Type:Trading Company

inquiry

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

L-threo-2,3-Hexodiulosonicacid, g-lactone

Cas:490-83-5

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Henan Tianfu Chemical Co., Ltd.

Product Name: DEHYDROASCORBIC ACID Synonyms: (5R)-5β-[(S)-1,2-Dihydroxyethyl]tetrahydrofuran-2,3,4-trione;C05422;Dehydroascorbate;L-Dehydroascorbate;L-threo-2,3-Hexodiulosonic Acid γ-Lactone;Oxidized Ascorbic Acid;OXIDIZED V

TIANFUCHEM--High purity 490-83-5 DEHYDROASCORBIC ACID

Cas:490-83-5

Min.Order:1 Metric Ton

FOB Price: $20.0

Type:Lab/Research institutions

inquiry

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,

DEHYDROASCORBIC ACID

Cas:490-83-5

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Henan Kanbei Chemical Co.,LTD

High quality, competitive price, fast delivery and first-class service we possesses have won the trust and praise of customers. Standard: BP/USP/EP The purity is equal or greater than 99%. As a supplier, we can provide high-quality products. Cle

Dehydroascorbic acid.99%

Cas:490-83-5

Min.Order:1 Metric Ton

Negotiable

Type:Lab/Research institutions

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

DEHYDROASCORBIC ACID

Cas:490-83-5

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

L-threo-2,3-Hexodiulosonicacid, g-lactone

Cas:490-83-5

Min.Order:1 Gram

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

SAGECHEM/Dehydroascorbic acid

Cas:490-83-5

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Win-Win chemical Co.Ltd

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

Dehydroascorbic acid cas no. 490-83-5 98%

Cas:490-83-5

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

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

dehydroascorbic acid

Cas:490-83-5

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Kono Chem Co.,Ltd

high purity lowest priceAppearance:solid or liquid Storage:in sealed air resistant place Package:drum and bag Application:for pharma use Transportation:by sea or air Port:Beijing or Guangzhou

dehydroascorbic acid

Cas:490-83-5

Min.Order:0

Negotiable

Type:Other

inquiry

Shanghai Acmec Biochemical Technology Co., Ltd.

Acmec is a leading manufacturer and supplier of biochemical reagents and life science products. We have over 40,000 items in stock (real-time inventory) and offer discounted prices to registered members of the online store ( www.acmec.com.cn ) Appea

Acmec (L)-Dehydroascorbic acid 1g

Cas:490-83-5

Min.Order:1 bottle

Negotiable

Type:Lab/Research institutions

inquiry

Henan Allgreen Chemical Co.,Ltd

high quality Storage:Sealed, dry, microtherm , avoid light and smell. Package:According to the demand of customer Application:Organic synthesis Transportation:by air or by sea

Dehydroascorbic acid

Cas:490-83-5

Min.Order:0

Negotiable

Type:Manufacturers

inquiry

Hunan chemfish Pharmaceutical co.,Ltd

Hunan chemfish Pharmaceutical co.,Ltd.located in Lugu High-tech industral park ,Hunan province . with its own R&D center and more than 10000㎡manufacture plant . Chemfish owns 40 reactors from 1000L to 8000L. With complete auxiliary equipment as

Dehydroascorbic acid

Cas:490-83-5

Min.Order:0

Negotiable

Type:Manufacturers

inquiry

Antimex Chemical Limied

hight degree of purity Application:Fine chemical intermediates, used as the main raw material for he synthesis of various pesticides, medicines, surfactants, polymer monomers, Ond Ontifungal agents

L-threo-2,3-Hexodiulosonicacid, g-lactone

Cas:490-83-5

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Chemsigma International Co.,Ltd.

bulk productionChemsigma International Co.,Ltd. is a chemical manufacturer, specialize in custom synthesis and organic chemical manufacturing for overseas customers, in the field of API, pharmaceutical intermediates, chemical intermediates, fine chem

DEHYDROASCORBIC ACID

Cas:490-83-5

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Hangzhou Fandachem Co.,Ltd

L-threo-2,3-Hexodiulosonicacid, g-lactoneAppearance:white crystalline powder Storage:Store in dry, dark and ventilated place Package:25KG drum Application:intermediate Transportation:by air, by sea, by express

L-threo-2,3-Hexodiulosonicacid, g-lactone

Cas:490-83-5

Min.Order:0

Negotiable

Type:Other

inquiry

Shanghai Yuanye Bio-Technology Co., Ltd.

good quality, competitive price, thoughtful after sale serviceAppearance:white powder Storage:Keep it in dry,shady and cool place Package:50mg Application:Pharma;Industry;Agricultural;chemical reaserch Transportation:by express or by sea Port:Any por

Dehydroascorbic acid

Cas:490-83-5

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Guangzhou Lanning Biotechnology Co., Ltd

Provide HPLC,HNMR,MS and COA. Package:Glass bottles Application:scientific research Transportation:by air

Ascorbic Acid Impurity 9

Cas:490-83-5

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

ZHEJIANG JIUZHOU CHEM CO.,LTD

factory?direct?saleAppearance:White powder Storage:Sealed and preserved Package:200/Kilograms Application:healing drugs Transportation:By sea Port:Shanghai/tianjin

DEHYDROASCORBIC ACID

Cas:490-83-5

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Amadis Chemical Co., Ltd.

1.Professional synthesis laboratory and production base. 2.Strong synthesis team and service team. 3.Professional data management system. 4.We provide the professional test date and product information ,ex. HNMR ,CNMR,FNMR, HPLC/G

Dehydroascorbic acid

Cas:490-83-5

Min.Order:10 Milligram

Negotiable

Type:Lab/Research institutions

inquiry

HENAN SUNLAKE ENTERPRISE CORPORATION

DEHYDROASCORBIC ACID

Cas:490-83-5

Min.Order:1 Kilogram

Negotiable

Type:Trading Company

inquiry

Changzhou Extraordinary Pharmatech co.,LTD

Changzhou Extraordinary Pharmatech co., LTD. As a leading chemical manufacturer and supplier in China.DAS authentication is passed.We can provide the popular precursor chemicals, we have our own strong R & D team, have our own laboratories and fa

L-Dehydro Ascorbic Acid

Cas:490-83-5

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Synthetic route

ascorbic acid
50-81-7

ascorbic acid

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
With N-bromosaccharin; acetic acid for 0.0333333h; Ambient temperature;100%
With hexacyanoferrate(III) In water at 25℃; Mechanism; Rate constant; influence of pH (-1 to 1), ionic strength;
With starch-KI; chloroamine-T Product distribution; conditions for analytical determination, other halogenide used;
2,3-Dimethoxy-5-methyl-1,4-benzoquinone
605-94-7

2,3-Dimethoxy-5-methyl-1,4-benzoquinone

ascorbic acid
50-81-7

ascorbic acid

A

2,3-dimethoxy-5-methylbenzene-1,4-diol
3066-90-8

2,3-dimethoxy-5-methylbenzene-1,4-diol

B

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
With acetate-phosphate buffer at 25℃; Rate constant; Mechanism; Thermodynamic data; pH 3.0; var. pH; var. temps.; ΔS(excit.), ΔH(excit.), ΔG(excit.);
[bis(acetoxy)iodo]benzene
3240-34-4

[bis(acetoxy)iodo]benzene

ascorbic acid
50-81-7

ascorbic acid

A

iodobenzene
591-50-4

iodobenzene

B

acetic acid
64-19-7

acetic acid

C

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
In acetic acid at 24.9℃; Rate constant; Thermodynamic data; Equilibrium constant; other temperatures; ΔH(excit.), ΔG(excit.), ΔS(excit.), ΔH, ΔG, ΔS;
In water; acetic acid at 31.9℃; Thermodynamic data; Kinetics; Mechanism; velocity constants, further temp., var. conc. of educts, activation energy, formation konstant K, ΔH(excit.), ΔG(excit.), ΔS(excit.), ΔH, ΔS, ΔG, effect of variation of solvent (var. percentage of HOAc in water, 318 K);
4-chloro-1-(diacetoxyiodo)benzene
6973-73-5

4-chloro-1-(diacetoxyiodo)benzene

ascorbic acid
50-81-7

ascorbic acid

A

1-Chloro-4-iodobenzene
637-87-6

1-Chloro-4-iodobenzene

B

acetic acid
64-19-7

acetic acid

C

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
In acetic acid at 24.9℃; Rate constant; Thermodynamic data; Equilibrium constant; other temperatures; ΔH(excit.), ΔG(excit.), ΔS(excit.), ΔH, ΔG, ΔS;
(3-chlorophenyl)iodanediyl diacetate
16308-17-1

(3-chlorophenyl)iodanediyl diacetate

ascorbic acid
50-81-7

ascorbic acid

A

3-iodochlorobenzene
625-99-0

3-iodochlorobenzene

B

acetic acid
64-19-7

acetic acid

C

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
In acetic acid at 24.9℃; Rate constant; Thermodynamic data; Equilibrium constant; other temperatures; ΔH(excit.), ΔG(excit.), ΔS(excit.), ΔH, ΔG, ΔS;
(4-nitrophenyl)-λ3-iodanediyl diacetate
19169-99-4

(4-nitrophenyl)-λ3-iodanediyl diacetate

ascorbic acid
50-81-7

ascorbic acid

A

p-nitrobenzene iodide
636-98-6

p-nitrobenzene iodide

B

acetic acid
64-19-7

acetic acid

C

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
In acetic acid at 24.9℃; Rate constant; Thermodynamic data; Equilibrium constant; other temperatures; ΔH(excit.), ΔG(excit.), ΔS(excit.), ΔH, ΔG, ΔS;
m-(diacetoxyiodo)toluene
19169-97-2

m-(diacetoxyiodo)toluene

ascorbic acid
50-81-7

ascorbic acid

A

3-Iodotoluene
625-95-6

3-Iodotoluene

B

acetic acid
64-19-7

acetic acid

C

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
In acetic acid at 24.9℃; Rate constant; Thermodynamic data; Equilibrium constant; other temperatures; ΔH(excit.), ΔG(excit.), ΔS(excit.), ΔH, ΔG, ΔS;
1-(diacetoxyiodo)-4-methylbenzene
16308-16-0

1-(diacetoxyiodo)-4-methylbenzene

ascorbic acid
50-81-7

ascorbic acid

A

4-tolyl iodide
624-31-7

4-tolyl iodide

B

acetic acid
64-19-7

acetic acid

C

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
In acetic acid at 24.9℃; Rate constant; Thermodynamic data; Equilibrium constant; other temperatures; ΔH(excit.), ΔG(excit.), ΔS(excit.), ΔH, ΔG, ΔS;
3-nitro(diacetoxyiodo)benzene
16307-37-2

3-nitro(diacetoxyiodo)benzene

ascorbic acid
50-81-7

ascorbic acid

A

m-iodonitrobenzene
645-00-1

m-iodonitrobenzene

B

acetic acid
64-19-7

acetic acid

C

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
In acetic acid at 24.9℃; Rate constant; Thermodynamic data; Equilibrium constant; other temperatures; ΔH(excit.), ΔG(excit.), ΔS(excit.), ΔH, ΔG, ΔS;
4-methoxy(diacetoxyiodo)benzene
16308-14-8

4-methoxy(diacetoxyiodo)benzene

ascorbic acid
50-81-7

ascorbic acid

A

para-iodoanisole
696-62-8

para-iodoanisole

B

acetic acid
64-19-7

acetic acid

C

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
In acetic acid at 24.9℃; Rate constant; Thermodynamic data; Equilibrium constant; other temperatures; ΔH(excit.), ΔG(excit.), ΔS(excit.), ΔH, ΔG, ΔS;
(4-bromophenyl)-λ3-iodanediyl diacetate
41018-52-4

(4-bromophenyl)-λ3-iodanediyl diacetate

ascorbic acid
50-81-7

ascorbic acid

A

1,4-bromoiodobenzene
589-87-7

1,4-bromoiodobenzene

B

acetic acid
64-19-7

acetic acid

C

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
In acetic acid at 24.9℃; Rate constant; Thermodynamic data; Equilibrium constant; other temperatures; ΔH(excit.), ΔG(excit.), ΔS(excit.), ΔH, ΔG, ΔS;
ascorbic acid
50-81-7

ascorbic acid

A

(4R,5S)-4,5,6-Trihydroxy-2,3-dioxo-hexanoic acid
3445-22-5

(4R,5S)-4,5,6-Trihydroxy-2,3-dioxo-hexanoic acid

B

threo-hexa-2,4-dienoic acid lactone

threo-hexa-2,4-dienoic acid lactone

C

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
With dihydrogen peroxide; copper(II) sulfate In water Product distribution; degradation of ascorbic acid in H2O2 and cupric ion solutions, oxidation with different oxygen sources, possible oxidation products, effect of cupric ion, GC/MS study;
ascorbic acid
50-81-7

ascorbic acid

A

ascorbate
299-36-5

ascorbate

B

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
With superoxide ion In acetonitrile Mechanism; Rate constant; Ambient temperature; variarion of solvent and oxidizing agent, effect of Fe(3+);
3,5-di-tert-butyl-o-benzoquinone
3383-21-9

3,5-di-tert-butyl-o-benzoquinone

A

3,5-Di-tert-butylcatechol
1020-31-1

3,5-Di-tert-butylcatechol

B

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
With ascorbic acid In methanol Rate constant;
ascorbic acid
50-81-7

ascorbic acid

A

oxalic acid
144-62-7

oxalic acid

B

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
With oxygen In methanol at 25℃; for 1h; Product distribution;
5a-tocopheryl ascorbate

5a-tocopheryl ascorbate

A

α‑tocopherol quinone
758720-42-2

α‑tocopherol quinone

B

vitamin E
18920-63-3

vitamin E

C

C58H96O4

C58H96O4

D

ascorbic acid
50-81-7

ascorbic acid

E

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
With water In methanol for 24h; Mechanism; var. pH and time;
(4R,5S)-4,5,6-Trihydroxy-2,3-dioxo-hexanoic acid
3445-22-5

(4R,5S)-4,5,6-Trihydroxy-2,3-dioxo-hexanoic acid

A

3,4-Dihydroxy-6-hydroxymethyl-pyran-2,5-dione

3,4-Dihydroxy-6-hydroxymethyl-pyran-2,5-dione

B

3,4-dihydroxy-5-hydroxymethyl-2-oxo-3-penten-5-olide

3,4-dihydroxy-5-hydroxymethyl-2-oxo-3-penten-5-olide

C

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
With hydrogenchloride; 1,4-dithio-erythritol In water at 30℃; for 1h; Product distribution; other reagent (pH dependence);
selenium(IV) oxide
7446-08-4

selenium(IV) oxide

ethanol
64-17-5

ethanol

ascorbic acid
50-81-7

ascorbic acid

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

water
7732-18-5

water

ascorbic acid
50-81-7

ascorbic acid

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
beim Leiten von Luft;
mit UV-Licht.Irradiation;
bei Einwirkung von γ-Strahlen;
untersucht wurde der zeitliche Verlauf der Reaktion mit Methylenblau bei Belichtung;
hydrogenchloride
7647-01-0

hydrogenchloride

water
7732-18-5

water

ascorbic acid
50-81-7

ascorbic acid

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
bei der elektrochemischen Oxydation an einer Platin-Anode;
1,4-dioxane
123-91-1

1,4-dioxane

water
7732-18-5

water

cis-nitrous acid
7782-77-6

cis-nitrous acid

ascorbic acid
50-81-7

ascorbic acid

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
Rate constant;
water
7732-18-5

water

acetic acid
64-19-7

acetic acid

ascorbic acid
50-81-7

ascorbic acid

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

diethyl ether
60-29-7

diethyl ether

water
7732-18-5

water

p-benzoquinone
106-51-4

p-benzoquinone

ascorbic acid
50-81-7

ascorbic acid

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

pyridine
110-86-1

pyridine

ascorbic acid
50-81-7

ascorbic acid

copper (II)-chloride

copper (II)-chloride

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
unter Ausschluss von Sauerstoff;
methanol
67-56-1

methanol

bromine
7726-95-6

bromine

ascorbic acid
50-81-7

ascorbic acid

lead (II)-carbonate

lead (II)-carbonate

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

methanol
67-56-1

methanol

iodine
7553-56-2

iodine

ascorbic acid
50-81-7

ascorbic acid

lead (II)-carbonate

lead (II)-carbonate

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

methanol
67-56-1

methanol

chlorine
7782-50-5

chlorine

ascorbic acid
50-81-7

ascorbic acid

lead (II)-carbonate

lead (II)-carbonate

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

water
7732-18-5

water

ascorbic acid
50-81-7

ascorbic acid

mercury (II)-chloride

mercury (II)-chloride

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
Rate constant;
water
7732-18-5

water

ascorbic acid
50-81-7

ascorbic acid

mercury (II)-chloride

mercury (II)-chloride

deuterium oxide

deuterium oxide

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

Conditions
ConditionsYield
untersucht wurde der zeitliche Verlauf;
thiosemicarbazide
79-19-6

thiosemicarbazide

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

dehydro-L-ascorbic acid bis(hydrazonecarbothioamide)

dehydro-L-ascorbic acid bis(hydrazonecarbothioamide)

Conditions
ConditionsYield
In methanol; water for 0.5h; Heating;80%
1,2-diamino-benzene
95-54-5

1,2-diamino-benzene

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

3-(1,2,3-trihydroxy-propyl)-quinoxaline-2-carboxylic acid 2-amino-anilide
804-00-2

3-(1,2,3-trihydroxy-propyl)-quinoxaline-2-carboxylic acid 2-amino-anilide

Conditions
ConditionsYield
In methanol at 40℃; for 2h;76%
hydrazinecarbodithioic acid methyl ester
5397-03-5

hydrazinecarbodithioic acid methyl ester

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

dehydro-L-ascorbic acid bis(S-methylhydrazonecarbodithioate)

dehydro-L-ascorbic acid bis(S-methylhydrazonecarbodithioate)

Conditions
ConditionsYield
In methanol; water for 0.5h; Heating;75%
3,5-dimethoxyphenol
500-99-2

3,5-dimethoxyphenol

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

(3R,3aR,8bS)-3-((S)-1,2-dihydroxyethyl)-3a,8b-dihydroxy-6,8-dimethoxy-3,3a-dihydrofuro[3,4-b]benzofuran-1(8bH)-one
1350802-52-6

(3R,3aR,8bS)-3-((S)-1,2-dihydroxyethyl)-3a,8b-dihydroxy-6,8-dimethoxy-3,3a-dihydrofuro[3,4-b]benzofuran-1(8bH)-one

Conditions
ConditionsYield
With acetic acid In tetrahydrofuran stereoselective reaction;72%
3,5-dihydroxyphenol
108-73-6

3,5-dihydroxyphenol

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

(3R,3aR,8bS)-3-((S)-1,2-dihydroxyethyl)-3a,6,8,8b-tetrahydroxy-3,3a-dihydrofuro[3,4-b]benzofuran-1(8bH)-one
1350981-42-8

(3R,3aR,8bS)-3-((S)-1,2-dihydroxyethyl)-3a,6,8,8b-tetrahydroxy-3,3a-dihydrofuro[3,4-b]benzofuran-1(8bH)-one

Conditions
ConditionsYield
With acetic acid In tetrahydrofuran stereoselective reaction;69%
(2-nitrophenyl)hydrazine
3034-19-3

(2-nitrophenyl)hydrazine

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

L-threo-2,3-hexodiulosono-1,4-lactone 2,3-bis(o-nitrophenylhydrazone)
102691-03-2

L-threo-2,3-hexodiulosono-1,4-lactone 2,3-bis(o-nitrophenylhydrazone)

Conditions
ConditionsYield
With acetic acid In water at 100℃; for 0.5h;67.5%
(2-chlorophenyl)hydrazine
10449-07-7

(2-chlorophenyl)hydrazine

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

L-threo-2,3-Hexodiulosono-1,4-lacton-2-(o-chlor-phenylhydrazon)
111205-85-7

L-threo-2,3-Hexodiulosono-1,4-lacton-2-(o-chlor-phenylhydrazon)

Conditions
ConditionsYield
In water at 20℃; for 24h;60%
(1-methyl-1H-indol-2-yl)-methanol
1485-22-9

(1-methyl-1H-indol-2-yl)-methanol

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

(3R,3aR,10cS)-3-[(1S)-1,2-dihydroxyethyl]-3a,10c-dihydroxy-6-methyl-3a,5,6,10c-tetrahydrofuro[3',4':5,6]pyrano[3,4-b]indol-1(3H)-one

(3R,3aR,10cS)-3-[(1S)-1,2-dihydroxyethyl]-3a,10c-dihydroxy-6-methyl-3a,5,6,10c-tetrahydrofuro[3',4':5,6]pyrano[3,4-b]indol-1(3H)-one

Conditions
ConditionsYield
With disodium hydrogenphosphate; citric acid In methanol; water at 20℃; for 168h;60%
(2-nitrophenyl)hydrazine
3034-19-3

(2-nitrophenyl)hydrazine

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

L-threo-2,3-hexodiulosono-1,4-lactone 2-(o-nitrophenylhydrazone)
102691-09-8

L-threo-2,3-hexodiulosono-1,4-lactone 2-(o-nitrophenylhydrazone)

Conditions
ConditionsYield
In water for 24h; Ambient temperature;55%
2-(hydroxymethyl)indole
24621-70-3

2-(hydroxymethyl)indole

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

(3R,3aR,10cS)-3-[(1S)-1,2-dihydroxyethyl]-3a,10c-dihydroxy-3a,5,6,10c-tetrahydrofuro[3',4':5,6]pyrano[3,4-b]indol-1(3H)-one
758697-70-0

(3R,3aR,10cS)-3-[(1S)-1,2-dihydroxyethyl]-3a,10c-dihydroxy-3a,5,6,10c-tetrahydrofuro[3',4':5,6]pyrano[3,4-b]indol-1(3H)-one

Conditions
ConditionsYield
With disodium hydrogenphosphate; citric acid In methanol; water at 20℃; for 168h;50%
3,4-dihydro-2H-chromene-5,7-diol
543710-46-9

3,4-dihydro-2H-chromene-5,7-diol

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

A

(6bS,9R,9aR)-9-((S)-1,2-dihydroxyethyl)-6,6b,9a-trihydroxy-2,3,9,9a-tetrahydro-1H-furo[3',4':4,5]furo[2,3-f]chromen-7(6bH)-one
1350802-54-8

(6bS,9R,9aR)-9-((S)-1,2-dihydroxyethyl)-6,6b,9a-trihydroxy-2,3,9,9a-tetrahydro-1H-furo[3',4':4,5]furo[2,3-f]chromen-7(6bH)-one

B

(7aR,8R,10aS)-8-((S)-1,2-dihydroxyethyl)-5,7a,10a-trihydroxy-3,4,7a,8-tetrahydro-2H-furo[3',4':4,5]furo[2,3-h]chromen-10(10aH)-one
1350802-53-7

(7aR,8R,10aS)-8-((S)-1,2-dihydroxyethyl)-5,7a,10a-trihydroxy-3,4,7a,8-tetrahydro-2H-furo[3',4':4,5]furo[2,3-h]chromen-10(10aH)-one

Conditions
ConditionsYield
With acetic acid In tetrahydrofuran regioselective reaction;A 25%
B 47%
3-bromophenylhydrazine hydrochloride
27246-81-7

3-bromophenylhydrazine hydrochloride

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

L-threo-2,3-hexodiulosono-1,4-lactone-2-m-bromophenylhydrazone
120308-92-1

L-threo-2,3-hexodiulosono-1,4-lactone-2-m-bromophenylhydrazone

Conditions
ConditionsYield
With sodium acetate In ethanol at 20℃; Condensation;20%
L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

L-Tryptophan
73-22-3

L-Tryptophan

C17H14N2O6

C17H14N2O6

Conditions
ConditionsYield
In ethanol for 0.833333h; Heating;11%
butanoic acid anhydride
106-31-0

butanoic acid anhydride

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

(3aR,6aR,12aR)-3c,5a,9c,11a-tetrakis-butyryloxy-(3ar,5at,9ac,11at)-tetrahydro-1,4,6,7,10,12-hexaoxa-dicyclopent[c,i]-s-indacene-5,11-dione

(3aR,6aR,12aR)-3c,5a,9c,11a-tetrakis-butyryloxy-(3ar,5at,9ac,11at)-tetrahydro-1,4,6,7,10,12-hexaoxa-dicyclopent[c,i]-s-indacene-5,11-dione

Conditions
ConditionsYield
With pyridine
acetic anhydride
108-24-7

acetic anhydride

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

(3aR,6aR,12aR)-3c,5a,9c,11a-tetraacetoxy-(3ar,5at,9ac,11at)-tetrahydro-1,4,6,7,10,12-hexaoxa-dicyclopent[c,i]-s-indacene-5,11-dione
25726-18-5

(3aR,6aR,12aR)-3c,5a,9c,11a-tetraacetoxy-(3ar,5at,9ac,11at)-tetrahydro-1,4,6,7,10,12-hexaoxa-dicyclopent[c,i]-s-indacene-5,11-dione

Conditions
ConditionsYield
With sulfuric acid
With pyridine
phenylhydrazine hydrochloride
59-88-1

phenylhydrazine hydrochloride

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

L-threo-2,3-hexodiulosono-1,4-lactone 2-(phenylhydrazone)
28912-21-2

L-threo-2,3-hexodiulosono-1,4-lactone 2-(phenylhydrazone)

Conditions
ConditionsYield
With water
benzoyl chloride
98-88-4

benzoyl chloride

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

(3aR,6aR,12aR)-3c,5a,9c,11a-tetrakis-benzoyloxy-(3ar,5at,9ac,11at)-tetrahydro-1,4,6,7,10,12-hexaoxa-dicyclopent[c,i]-s-indacene-5,11-dione
103559-39-3

(3aR,6aR,12aR)-3c,5a,9c,11a-tetrakis-benzoyloxy-(3ar,5at,9ac,11at)-tetrahydro-1,4,6,7,10,12-hexaoxa-dicyclopent[c,i]-s-indacene-5,11-dione

Conditions
ConditionsYield
With pyridine
acetyl chloride
75-36-5

acetyl chloride

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

(3aR,6aR,12aR)-3c,5a,9c,11a-tetraacetoxy-(3ar,5at,9ac,11at)-tetrahydro-1,4,6,7,10,12-hexaoxa-dicyclopent[c,i]-s-indacene-5,11-dione
25726-18-5

(3aR,6aR,12aR)-3c,5a,9c,11a-tetraacetoxy-(3ar,5at,9ac,11at)-tetrahydro-1,4,6,7,10,12-hexaoxa-dicyclopent[c,i]-s-indacene-5,11-dione

Conditions
ConditionsYield
With pyridine
ethanol
64-17-5

ethanol

1,2-diamino-benzene
95-54-5

1,2-diamino-benzene

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

(R)-2-((S)-1,2-dihydroxy-ethyl)-furo[2,3-b]quinoxalin-3-one
121067-28-5

(R)-2-((S)-1,2-dihydroxy-ethyl)-furo[2,3-b]quinoxalin-3-one

Conditions
ConditionsYield
Verb. 1: 1 Mol;
1,2-diamino-benzene
95-54-5

1,2-diamino-benzene

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

N-(2-aminophenyl)-3-[(1S,2S)-1,2,3-trihydroxypropyl]quinoxaline-2-carboxamide
87661-79-8

N-(2-aminophenyl)-3-[(1S,2S)-1,2,3-trihydroxypropyl]quinoxaline-2-carboxamide

phenylhydrazine
100-63-0

phenylhydrazine

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

L-threo-2,3-hexodiulosono-1,4-lacton 2,3-bis(phenylhydrazone)
3909-11-3

L-threo-2,3-hexodiulosono-1,4-lacton 2,3-bis(phenylhydrazone)

Conditions
ConditionsYield
With sodium acetate
With hydrogenchloride; sodium acetate
With acetic acid
Cinnamoyl chloride
102-92-1

Cinnamoyl chloride

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

(3aR,6aR,12aR)-3c,5a,9c,11a-tetrakis-trans-cinnamoyloxy-(3ar,5at,9ac,11at)-tetrahydro-1,4,6,7,10,12-hexaoxa-dicyclopent[c,i]-s-indacene-5,11-dione

(3aR,6aR,12aR)-3c,5a,9c,11a-tetrakis-trans-cinnamoyloxy-(3ar,5at,9ac,11at)-tetrahydro-1,4,6,7,10,12-hexaoxa-dicyclopent[c,i]-s-indacene-5,11-dione

Conditions
ConditionsYield
With pyridine; benzene
(2,4-dinitro-phenyl)-hydrazine
119-26-6

(2,4-dinitro-phenyl)-hydrazine

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

dehydro-L-ascorbic acid bis((2,4-dinitrophenyl)hydrazone)
18485-91-1

dehydro-L-ascorbic acid bis((2,4-dinitrophenyl)hydrazone)

Conditions
ConditionsYield
With ethanol; sulfuric acid
With hydrogenchloride
With sulfuric acid; meta-phosphoric acid; tin(ll) chloride at 37℃; for 3h;0.46 g
4-aminosulfonylphenylhydrazine
4392-54-5

4-aminosulfonylphenylhydrazine

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

(S)-5-((S)-1,2-dihydroxy-ethyl)-furan-2,3,4-trione-3,4-bis-(4-sulfamoyl-phenylhydrazone)
68774-09-4

(S)-5-((S)-1,2-dihydroxy-ethyl)-furan-2,3,4-trione-3,4-bis-(4-sulfamoyl-phenylhydrazone)

Conditions
ConditionsYield
With acetic acid
L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

(4R,5S)-4,5,6-Trihydroxy-2,3-dioxo-hexanoic acid
3445-22-5

(4R,5S)-4,5,6-Trihydroxy-2,3-dioxo-hexanoic acid

Conditions
ConditionsYield
at 17℃; Rate constant; in gepufferten wss. Loesungen vom pH 0.7 - 3.8;
in schwach sauren wss. Loesungen;
at 0 - 100℃; Rate constant; in gepufferter wss. Loesung vom pH 2.2;
L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

(S)-2,3,4,5-tetrahydroxy-pent-2-enal
27678-80-4

(S)-2,3,4,5-tetrahydroxy-pent-2-enal

Conditions
ConditionsYield
(i) H2O, (ii) (decarboxylation); Multistep reaction;
L-scorbamic acid
32764-43-5

L-scorbamic acid

ascorbic acid
50-81-7

ascorbic acid

L-dehydroascorbic acid
490-83-5

L-dehydroascorbic acid

A

Red Pigment

Red Pigment

B

Reduced Red Pigment

Reduced Red Pigment

C

Tris(2-deoxy-2-L-ascorbyl)amine

Tris(2-deoxy-2-L-ascorbyl)amine

Conditions
ConditionsYield
In ethanol at 80℃; for 0.25h; Product distribution; Mechanism; also in the absence of ascorbic acid and/or dehydroascorbic acid;

Hot Products

Post buying leads

About|Contact|Cas|Product Name|Molecular|Country|Encyclopedia

Message|New Cas|MSDS|Service|Advertisement|CAS DataBase|Article Data|Manufacturers | Chemical Catalog

©2008 LookChem.com,License: ICP

NO.:Zhejiang16009103

complaints:service@lookchem.com Desktop View