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inquiry1.In No Less 10 years exporting experience. you 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 Specializ
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inquiry1,3-ACETONEDICARBOXYLIC ACID ANHYDRIDE 98 CAS:10521-08-1 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
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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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inquiryName: 2H-Pyran-2,4,6(3H,5H)-trione Synonyms: Pyran-2,4,6-trione; oxane-2,4,6-trione; b-Ketoglutaric anhydride; 2H-Pyran-2,4,6(3H,5H)-trione; acetonedicarboxylic acid anhydride; Acetone dicarboxylic acid anhydride; 1,3-Acetonedicarboxylic acid anhydri
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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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inquiryCompany Introduction 1. Established in 2005, with two independent business divisions: Fine chemicals division; Pharmaceutical division. 2. Main product: Optical brightener Textile auxiliary Dye stuff Pigments
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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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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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inquiryWe are one of a few suppliers that can offer custom synthesis service of this product We are specialized in custom synthesis, chemical/pharmaceutical/ pesticides outsourcing and contract research. We are committed to prov
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inquiryProduct 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,
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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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inquiryHangzhou Fandachem Co.,Ltd, a China-based chemical company, specialize in exporting 1,3-ACETONEDICARBOXYLIC ACID ANHYDRIDE 98,cas:10521-08-1, Please contact us by email freely. We are leading exporter in China. If you really need this
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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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inquiryJinlan Pharm-Drugs Technology Co.,Limited (with its export company Hangzhou Royall Import & Export Co.,Ltd.)is located in Hangzhou, Zhejiang Province. Neighboring Ningbo port, Shanghai port, Hangzhou Xiaoshan Int’l Airport and Shanghai Pudong Int’l A
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inquiryTriumph has the complete production of G- KG - MT service chain,we can make the new technology into productivity quickly in the research and development of new products. Main Business Custom Synthesis:
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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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inquiryWe are a Union of chemistry in China, consists of chemists,engineers, laboratories,factories in China. We organize surplus capacity of R&D and production as well as custom synthesis for chemical products and chemical business project. We are supp
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inquiry1, High quality with competitive price:2, Fast and safe delivery3.Excellent pre-sales and after-sales service4. Well-trained and professional technologist and sales with rich experience in the field for 5-10 yearsAppearance:see detailed specification
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
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inquiry1.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
high purity lowest priceAppearance:solid or liquid Storage:in sealed air resistant place Package:Foil bag; Drum; Plastic bottle Application:Pharma;Industry;Agricultural Transportation:by sea or air Port:Beijing or Guangzhou
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inquiry1.Our services:A.Supply sampleB.The packing also can be according the customers` requirmentC.Any inquiries will be replied within 24 hoursD.we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate.
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inquirybest seller Application:API
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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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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
acetonedicarboxylic acid
pyran-2,4,6-trione
Conditions | Yield |
---|---|
With acetic anhydride at 0℃; for 3h; | 95.3% |
With acetic anhydride at 0℃; for 15h; | 93% |
With acetic anhydride; acetic acid at 0 - 10℃; for 3h; | 86% |
Conditions | Yield |
---|---|
With acetic acid In toluene at 5 - 10℃; | 87% |
acetonedicarboxylic acid
acetic anhydride
A
pyran-2,4,6-trione
B
3-acetyl-tetrahydropyran-2,4,6-trione
C
2-acetyl-3-oxo-glutaric acid
D
2,4-diacetyl-3-oxo-pentanedioic acid anhydride
citric acid
pyran-2,4,6-trione
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: chlorosulfonic acid / chloroform / 10 - 30 °C 2: acetic anhydride / 3 h / 0 °C View Scheme |
methanol
pyran-2,4,6-trione
acetone-1,3-dicarboxylic acid mono-methyl ester
Conditions | Yield |
---|---|
at 20℃; for 2h; Cooling with ice; | 100% |
for 1.5h; Ambient temperature; | 23.90 g |
for 30h; |
Conditions | Yield |
---|---|
at 20℃; for 2h; Inert atmosphere; | 100% |
at 20℃; for 2h; Cooling with ice; | 100% |
In n-heptane at 20 - 25℃; | |
at 0 - 20℃; for 3h; |
Conditions | Yield |
---|---|
at 20℃; for 2h; Cooling with ice; | 100% |
In water at 0 - 20℃; |
Conditions | Yield |
---|---|
at 20℃; for 2h; Cooling with ice; | 100% |
diazomethane
pyran-2,4,6-trione
4,6-dimethoxy-2-pyrone
Conditions | Yield |
---|---|
In diethyl ether at 25℃; for 3h; | 82% |
pyridine-2-carbaldehyde
methanol
pyran-2,4,6-trione
2-CHLOROBENZYLAMINE
Conditions | Yield |
---|---|
44% |
pyran-2,4,6-trione
3,5-Bis-diazo-pyran-2,4,6-trione
Conditions | Yield |
---|---|
With 3-azido-3-ethyl-1,3-benzothiazolium-tetrafluoroborat; acetic acid 1) 20 h, 20 deg C, 2) 2 h, 60 deg C; | 36% |
pyran-2,4,6-trione
methyl chloroformate
Conditions | Yield |
---|---|
With pyridine In dichloromethane at 20℃; | 36% |
pyridine-2-carbaldehyde
methanol
pyran-2,4,6-trione
cyclopropanemethylamine
Conditions | Yield |
---|---|
35% |
Conditions | Yield |
---|---|
at 0℃; |
pyran-2,4,6-trione
acetic anhydride
3-acetyl-tetrahydropyran-2,4,6-trione
pyran-2,4,6-trione
acetone-1,3-dicarboxylic acid mono-methyl ester
Conditions | Yield |
---|---|
With methanol |
pyran-2,4,6-trione
2-amino-benzenethiol
4-benzothiazol-2-yl-3-oxo-butyric acid
Conditions | Yield |
---|---|
In acetic acid methyl ester |
Conditions | Yield |
---|---|
With hydrogenchloride; aluminium trichloride; water 1.) reflux, 1 h, 2.) 0-5 deg C, 1 h 40 min; Yield given. Multistep reaction; |
pyran-2,4,6-trione
acetic anhydride
Conditions | Yield |
---|---|
at 45℃; |
pyran-2,4,6-trione
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1.1: 1 h / 20 °C 2.1: NaOH; sodium citrate / H2O / 72 h / 20 °C 2.2: 0.52 g / NaBH4 / methanol / 3 h / -30 °C View Scheme |
pyran-2,4,6-trione
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1.1: 1 h / 20 °C 2.1: NaOH; sodium citrate / H2O / 72 h / 20 °C 2.2: NaBH4 / methanol / 3 h / -30 °C 2.3: 0.23 g / pyridine; POCl3 / 1 h / Heating View Scheme |
pyran-2,4,6-trione
4-hydroxy-6-phenyl-2H-pyran-2-one
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 1.) AlCl3, 2.) water, HCl / 1.) reflux, 1 h, 2.) 0-5 deg C, 1 h 40 min 2: 98.6 percent / trifluoroacetic anhydride / diethyl ether / 2 h / 0 °C View Scheme |
pyran-2,4,6-trione
4-methoxy-6-phenyl-2H-pyran-2-one
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: 1.) AlCl3, 2.) water, HCl / 1.) reflux, 1 h, 2.) 0-5 deg C, 1 h 40 min 2: 98.6 percent / trifluoroacetic anhydride / diethyl ether / 2 h / 0 °C 3: 88.4 percent / K2CO3 / acetone / 18 h / Heating View Scheme |
pyran-2,4,6-trione
3-(4-Hydroxy-6-methoxycarbonylmethyl-2-oxo-2H-pyran-3-yl)-3-oxo-propionic acid methyl ester
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 30 h 2: 15.5 percent / 1.) 1,1'-carbonyldiimidazole, 2.) dil. HCl / tetrahydrofuran View Scheme |
pyran-2,4,6-trione
methyl 7-methyl-3-oxonona-4,6-dien-8-yne-1-carboxylate
Conditions | Yield |
---|---|
Multi-step reaction with 3 steps 1: 23.90 g / 1.5 h / Ambient temperature 2: 48 percent / pyridine / diethyl ether / 1.) -15 deg C, 2.) 18 h, room temp. 3: 6.6 percent / piperidinium acetate / benzene; diethyl ether / 1.) -20 deg C, 2.) 18 h, room temp. View Scheme |
pyran-2,4,6-trione
methyl trimethylsilyl acetonedicarboxylate
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 23.90 g / 1.5 h / Ambient temperature 2: 48 percent / pyridine / diethyl ether / 1.) -15 deg C, 2.) 18 h, room temp. View Scheme |
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