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Dayang Chem (Hangzhou) Co.,Ltd.

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

2H-pyran-2-one

Cas:504-31-4

Min.Order:1 Kilogram

FOB Price: $3.0

Type:Lab/Research institutions

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

2-Pyrone

Cas:504-31-4

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

Manufacturer supply CAS 504-31-4 with best quality

Cas:504-31-4

Min.Order:1 Kilogram

FOB Price: $139.0 / 210.0

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

2H-Pyran-2-one 504-31-4

Cas:504-31-4

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Qingdao Beluga Import and Export Co., LTD

ALPHA-PYRONE CAS:504-31-4 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 intermediates,

ALPHA-PYRONE CAS:504-31-4

Cas:504-31-4

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Shandong Hanjiang Chemical Co., Ltd.

Hello, 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

2H-Pyran-2-one

Cas:504-31-4

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

CAS NO.:504-31-4

Cas:504-31-4

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Hangzhou Keyingchem Co.,Ltd

Hangzhou 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

ALPHA-PYRONE

Cas:504-31-4

Min.Order:0 Metric Ton

Negotiable

Type:Lab/Research institutions

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

2H-Pyran-2-one

Cas:504-31-4

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Zibo Hangyu Biotechnology Development Co., Ltd

Zibo 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

ALPHA-PYRONE

Cas:504-31-4

Min.Order:10 Gram

FOB Price: $100.0

Type:Lab/Research institutions

inquiry

Hangzhou Huarong Pharm Co., Ltd.

We Huarong Pharm can provide Customized Synthesis & Process R&D & APIs and intermediates Production & Quality Research & Registration Application, especially our GMP validation service which complies with SFDA, FDA, WHO and EU EMPA. O

ALPHA-PYRONE

Cas:504-31-4

Min.Order:0

Negotiable

Type:Trading Company

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

Alpha-Pyrone

Cas:504-31-4

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Hangzhou Dingyan Chem Co., Ltd

R & D enterprises have their own stock in stock Package:1kg Application:pharmaceutical intermediates

2H-Pyran-2-one

Cas:504-31-4

Min.Order:0

Negotiable

Type:Manufacturers

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

alpha-Pyrone

Cas:504-31-4

Min.Order:0

Negotiable

Type:Manufacturers

inquiry

Henan Tianfu Chemical Co., Ltd.

1.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.

2H-Pyran-2-one

Cas:504-31-4

Min.Order:0

Negotiable

Type:Lab/Research institutions

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

Alpha-pyrone

Cas:504-31-4

Min.Order:0

Negotiable

Type:Manufacturers

inquiry

Antimex Chemical Limied

Ansciep 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

α-Pyrone

Cas:504-31-4

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

HANGZHOU TIANYE CHEMICALS CO., LTD.

We 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

alpha-Pyrone

Cas:504-31-4

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Hangzhou Fandachem Co.,Ltd

2H-PYRAN-2-ONEAppearance:white crystalline powder Storage:Store in dry, dark and ventilated place Package:25KG drum Application:intermediate Transportation:by air, by sea, by express

2H-PYRAN-2-ONE

Cas:504-31-4

Min.Order:0

Negotiable

Type:Other

inquiry

Henan Kanbei Chemical Co.,LTD

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

ALPHA-PYRONE

Cas:504-31-4

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Hebei Quanhe Biotechnology Co. LTD

1. Timely and efficient service to ensure communication with customers2. Produce products of different specifications and sizes according to your requirements.3. Quality procedures and standards recognized by SGS. Advanced plant equipment ensures sta

ALPHA-PYRONE

Cas:504-31-4

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Shanghai Chinqesen Biotechnology Co., Ltd.

Good Quality Package:1kg/bag Application:Medical or chemical Transportation:Air/Train/Sea Port:Shenzhen

504-31-4

Cas:504-31-4

Min.Order:0

Negotiable

Type:Trading Company

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

ALPHA-PYRONE

Cas:504-31-4

Min.Order:0

Negotiable

Type:Trading Company

inquiry

LEAP CHEM Co., Ltd.

Best Seller, High Quality, Competitive Price, Fast Delivery, Quick ResponseAppearance:powder, or liquid Storage:Stored in room temperature, ventilated place Package:Bottle, barrel, cargo, container, etc. Application:Pharmaceuticals, intermediates, AP

2H-PYRAN-2-ONE

Cas:504-31-4

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Jilin haofei import and export trade Co.,Ltd

Price, service, company and transport advantage: 1. Best service, place of origin China, high quality, and reasonable price. 2. It's customers' right to choose the package (EMS, DHL, FEDEX, UPS). 3. It's customers' right

2H-pyran-2-one CAS NO.504-31-4

Cas:504-31-4

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Shanghai united Scientific Co.,Ltd.

United Scientific Company Located in Shanghai of China , is a competitive player in the global specialty and fine chemical market. Fenghua has both the expertise and flexibility to produce a wide range of chemicals. Focusing on developing the innovat

2H-Pyran-2-one

Cas:504-31-4

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Chungking Joyinchem Co., Ltd.

Joyinchem have been committed to chemical supply for several years and have built good cooperation records with multinational chemical corporations and importers from all over the world. Our services include:-Spot goods-Contract manufacturing-Custom

2H-Pyran-2-one

Cas:504-31-4

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Nanjing Raymon Biotech Co., Ltd.

2H-Pyran-2-one Storage:keep in dry and cool condition Package:25kg or according to cutomer's demand Application:Chemical research/pharma intermediate Transportation:By Sea,by Air,By courier like DHL or Fedx. Port:Shanghai/Shenzhen

2H-Pyran-2-one

Cas:504-31-4

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Finetech Industry Limited

FINETECH INDUSTRY LIMITED is a LONDON based CRO company providing drug discovery & development services to worldwide clients. FINETECH INDUSTRY LIMITED supplies the ALPHA-PYRONE, CAS:504-31-4 with the most competitive price and the best quality. We c

ALPHA-PYRONE

Cas:504-31-4

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Shanghai Run-Biotech Co., Ltd.

1.We have rich experience in the development and production 2.Our factory is in Shanghai of China,We have convenient traffic conditions.3.We have advanced testing equipment and shipping line. Package:5g, 10g, 50g, 100g, 1kg Application:Pharmaceutical

2H-Pyran-2-one

Cas:504-31-4

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Synthetic route

5-bromo-5,6-dihydro-2H-pyran-2-one
53646-72-3

5-bromo-5,6-dihydro-2H-pyran-2-one

pyran-2-one
504-31-4

pyran-2-one

Conditions
ConditionsYield
With triethylamine In toluene at 5 - 40℃;89%
With triethylamine for 0.5h; Dehydrobromination; Heating;70%
With triethylamine Yield given;
hexane-3,4-cis-diol-2,5-dione
25566-16-9

hexane-3,4-cis-diol-2,5-dione

pyran-2-one
504-31-4

pyran-2-one

Conditions
ConditionsYield
With sodium dihydrogenphosphate; sodium hydroxide In acetic acid butyl ester; water at 80℃; for 12h;79.7%
3-bromo-2H-pyran-2-one
19978-32-6

3-bromo-2H-pyran-2-one

lithium dimethylcuprate
15681-48-8

lithium dimethylcuprate

A

3-methyl-2H-pyran-2-one
31678-73-6

3-methyl-2H-pyran-2-one

B

pyran-2-one
504-31-4

pyran-2-one

Conditions
ConditionsYield
In diethyl ether at -78℃; for 2h; Yields of byproduct given;A 5%
B n/a
2-oxo-2H-pyran-6-carboxylic acid
672-67-3

2-oxo-2H-pyran-6-carboxylic acid

pyran-2-one
504-31-4

pyran-2-one

Conditions
ConditionsYield
With copper
2H-pyran-2-one-5-carboxylic acid
500-05-0

2H-pyran-2-one-5-carboxylic acid

pyran-2-one
504-31-4

pyran-2-one

Conditions
ConditionsYield
With copper at 650℃; under 5 Torr;
5-diazo-1,3-cyclopentadiene
1192-27-4

5-diazo-1,3-cyclopentadiene

A

pyran-2-one
504-31-4

pyran-2-one

B

cyclopentadienone
13177-38-3

cyclopentadienone

C

cyclopentadienylidene
4729-01-5

cyclopentadienylidene

D

(Z)-5-Oxo-penta-2,4-dienal
39763-18-3

(Z)-5-Oxo-penta-2,4-dienal

E

Dioxirane

Dioxirane

Conditions
ConditionsYield
With oxygen at -253.2℃; Mechanism; Irradiation; other temperatures, different λ, reaction with (18)O(16)O and (18)O2;
5-diazo-1,3-cyclopentadiene
1192-27-4

5-diazo-1,3-cyclopentadiene

A

pyran-2-one
504-31-4

pyran-2-one

B

cyclopentadienone
13177-38-3

cyclopentadienone

C

(Z)-5-Oxo-penta-2,4-dienal
39763-18-3

(Z)-5-Oxo-penta-2,4-dienal

Conditions
ConditionsYield
With oxygen In solid matrix at -253.2℃; Product distribution; Mechanism; Irradiation; further with <18O>O2;
tricyclo<23,6.1.1.0>pyran-2-one
19192-82-6

tricyclo<23,6.1.1.0>pyran-2-one

A

pyran-2-one
504-31-4

pyran-2-one

B

1,3-cyclobutadiene
1120-53-2

1,3-cyclobutadiene

Conditions
ConditionsYield
at 620℃;
exo-4,5-epoxy-exo-10-oxatricyclo<5.2.1.02,6>deca-8-en-3-one
69528-36-5, 127642-28-8

exo-4,5-epoxy-exo-10-oxatricyclo<5.2.1.02,6>deca-8-en-3-one

A

pyran-2-one
504-31-4

pyran-2-one

4,5-epoxy-2-cyclopentenone
68781-88-4, 129076-58-0

4,5-epoxy-2-cyclopentenone

Conditions
ConditionsYield
under 0.04 Torr; for 1.5h; flash vacuum thermolysis; T1 75 deg C / T2 375 deg C; Yield given;
cyclopentadienone O-oxide
88766-67-0

cyclopentadienone O-oxide

A

pyran-2-one
504-31-4

pyran-2-one

B

cyclopentadienone
13177-38-3

cyclopentadienone

C

(Z)-5-Oxo-penta-2,4-dienal
39763-18-3

(Z)-5-Oxo-penta-2,4-dienal

D

cyclopentadienone oxide
68781-88-4

cyclopentadienone oxide

Conditions
ConditionsYield
Mechanism; Irradiation;
mercuro salt of/the/ coumalic acid

mercuro salt of/the/ coumalic acid

pyran-2-one
504-31-4

pyran-2-one

Conditions
ConditionsYield
Beim Destillieren im Wasserstoffstrom;
3-oxabicyclo<3.2.0>hept-6-ene-2,4-dione
10374-07-9

3-oxabicyclo<3.2.0>hept-6-ene-2,4-dione

A

2-oxa-3-oxobicyclo[2.2.0]hex-5-ene
22980-23-0

2-oxa-3-oxobicyclo[2.2.0]hex-5-ene

B

pyran-2-one
504-31-4

pyran-2-one

C

1,3-cyclobutadiene
1120-53-2

1,3-cyclobutadiene

D

(Z)-5-Oxo-penta-2,4-dienal
39763-18-3

(Z)-5-Oxo-penta-2,4-dienal

E

CO, CO2

CO, CO2

Conditions
ConditionsYield
In solid matrix at -269.2 - -248.2℃; Product distribution; Mechanism; Irradiation; irradiation with 248 nm, subsequent bleaching with 254- and 313 nm light destroys part of products; also with isotopomers;
3-oxabicyclo<3.2.0>hept-6-ene-2,4-dione
10374-07-9

3-oxabicyclo<3.2.0>hept-6-ene-2,4-dione

A

3-buten-1-yne
689-97-4

3-buten-1-yne

B

pyran-2-one
504-31-4

pyran-2-one

C

cyclopentadienone
13177-38-3

cyclopentadienone

D

CO2

CO2

Conditions
ConditionsYield
at 850℃; Product distribution; detection on argon matrix, 10 K;
6-methoxy-2H-pyran-3(6H)-one
60249-17-4

6-methoxy-2H-pyran-3(6H)-one

pyran-2-one
504-31-4

pyran-2-one

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: 90 percent / LiAlH4 / diethyl ether / 0.5 h / -60 °C
2: 72 percent / NBS; Me2S / CH2Cl2 / 1 h / 0 °C
3: 90 percent / Jones reagent / acetone / 0.5 h
4: 70 percent / Et3N / 0.5 h / Heating
View Scheme
6-hydroxy-3,6-dihydro-2H-pyran-3-one
35436-57-8

6-hydroxy-3,6-dihydro-2H-pyran-3-one

pyran-2-one
504-31-4

pyran-2-one

Conditions
ConditionsYield
Multi-step reaction with 5 steps
1: 75 percent / Ag2O / acetone / 24 h / 20 °C
2: 90 percent / LiAlH4 / diethyl ether / 0.5 h / -60 °C
3: 72 percent / NBS; Me2S / CH2Cl2 / 1 h / 0 °C
4: 90 percent / Jones reagent / acetone / 0.5 h
5: 70 percent / Et3N / 0.5 h / Heating
View Scheme
methyl 2,3-dideoxy-α,β-DL-glycero-pent-2-enopyranoside
283156-05-8

methyl 2,3-dideoxy-α,β-DL-glycero-pent-2-enopyranoside

pyran-2-one
504-31-4

pyran-2-one

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: 72 percent / NBS; Me2S / CH2Cl2 / 1 h / 0 °C
2: 90 percent / Jones reagent / acetone / 0.5 h
3: 70 percent / Et3N / 0.5 h / Heating
View Scheme
3-bromo-6-methoxy-3,6-dihydro-2H-pyran
283156-10-5

3-bromo-6-methoxy-3,6-dihydro-2H-pyran

pyran-2-one
504-31-4

pyran-2-one

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 90 percent / Jones reagent / acetone / 0.5 h
2: 70 percent / Et3N / 0.5 h / Heating
View Scheme
exo-10-oxatricyclo<5.2.1.02,6>deca-4,8-dien-3-one
64919-86-4, 69609-00-3

exo-10-oxatricyclo<5.2.1.02,6>deca-4,8-dien-3-one

pyran-2-one
504-31-4

pyran-2-one

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 94 percent / 33percent hydrogen peroxide, 0.2 N sodium hydroxide / methanol; CH2Cl2; H2O / 3 h
2: 1.5 h / 0.04 Torr / flash vacuum thermolysis; T1 75 deg C / T2 375 deg C
View Scheme
3,4-dihydro-2H-pyran
110-87-2

3,4-dihydro-2H-pyran

pyran-2-one
504-31-4

pyran-2-one

Conditions
ConditionsYield
Multi-step reaction with 4 steps
1: 6 percent / piridinium dichromate / CH2Cl2 / 2 h / 0 °C
2: 0.025 g / triethylamine / toluene / 0.5 h / 80 °C
3: NBS
4: triethylamine
View Scheme
Multi-step reaction with 3 steps
1: 50 percent / piridinium dichromate / CH2Cl2 / 2 h / 0 °C
2: NBS
3: triethylamine
View Scheme
Multi-step reaction with 4 steps
1: 6 percent / piridinium dichromate, t-butyl hydroperoxide / CH2Cl2 / 2 h / 0 °C
2: 0.025 g / triethylamine / toluene / 0.5 h / 80 °C
3: NBS
4: triethylamine
View Scheme
Multi-step reaction with 3 steps
1: 50 percent / piridinium dichromate, t-butyl hydroperoxide / CH2Cl2 / 2 h / 0 °C
2: NBS
3: triethylamine
View Scheme
2-(tert.butylperoxy)-3,4-dihydropyran
70411-95-9

2-(tert.butylperoxy)-3,4-dihydropyran

pyran-2-one
504-31-4

pyran-2-one

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1: 0.025 g / triethylamine / toluene / 0.5 h / 80 °C
2: NBS
3: triethylamine
View Scheme
5,6-dihydro-pyran-2-one
3393-45-1

5,6-dihydro-pyran-2-one

pyran-2-one
504-31-4

pyran-2-one

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: NBS
2: triethylamine
View Scheme
pyran-2-one
504-31-4

pyran-2-one

5-oxabicyclo<2.2.0>hex-2-en-6-one
22980-23-0

5-oxabicyclo<2.2.0>hex-2-en-6-one

Conditions
ConditionsYield
In diethyl ether at -15℃; Inert atmosphere; Irradiation;100%
In diethyl ether at -10℃; for 24h; Inert atmosphere; Irradiation;100 %Spectr.
In diethyl ether at -10℃; UV-irradiation; Inert atmosphere;
In diethyl ether at -10℃; Inert atmosphere; Microwave irradiation;
In diethyl ether at -15℃; Inert atmosphere; Irradiation;
pyran-2-one
504-31-4

pyran-2-one

decacarbonyl-1κ(4)C,2κ(3)C,3κ(3)C-μ-hydrido-2:3κ(2)H-μ-hydroxy-2:3κ(2)O-trisosmium-(3 Os-Os)

decacarbonyl-1κ(4)C,2κ(3)C,3κ(3)C-μ-hydrido-2:3κ(2)H-μ-hydroxy-2:3κ(2)O-trisosmium-(3 Os-Os)

Os3(CO)10(μ-H)(μ-OH)*α-pyrone

Os3(CO)10(μ-H)(μ-OH)*α-pyrone

Conditions
ConditionsYield
In hexane ligand was added to hexane soln. of Os-cluster in Schlenk tube, heated at 40°C for 2 h under N2; solvent was removed under reduced pressure, recrystd. from CH2Cl2/hexaneat -5°C; elem. anal.;99%
N-phenyl-maleimide
941-69-5

N-phenyl-maleimide

pyran-2-one
504-31-4

pyran-2-one

N,N'-diphenylbicyclo<2.2.2>oct-7-ene-2,3,5,6-tetracarboxydiimide
64856-70-8, 97643-47-5

N,N'-diphenylbicyclo<2.2.2>oct-7-ene-2,3,5,6-tetracarboxydiimide

Conditions
ConditionsYield
In decalin for 1.5h; Heating;98%
pyran-2-one
504-31-4

pyran-2-one

5,6-dibromo-5,6-dihydro-2H-pyran-2-one
22682-17-3

5,6-dibromo-5,6-dihydro-2H-pyran-2-one

Conditions
ConditionsYield
Stage #1: pyran-2-one With bromine In dichloromethane at -78℃; for 5h; Inert atmosphere; Irradiation;
Stage #2: In dichloromethane at -78 - 20℃; Inert atmosphere;
97%
With bromine In dichloromethane at -78℃; for 6h; Cooling with acetone-dry ice; Irradiation;97%
With bromine Irradiation;
pyran-2-one
504-31-4

pyran-2-one

[sodium phosphaethynolate•(dioxane)2.5]

[sodium phosphaethynolate•(dioxane)2.5]

C5H4OP(1-)*Na(1+)*C5H5OP*C4H8O2

C5H4OP(1-)*Na(1+)*C5H5OP*C4H8O2

Conditions
ConditionsYield
In 1,2-dimethoxyethane at 60℃; for 4h; Inert atmosphere;97%
pyran-2-one
504-31-4

pyran-2-one

allyl acrylate
999-55-3

allyl acrylate

3-Oxo-2-oxa-bicyclo[2.2.2]oct-7-ene-6-carboxylic acid allyl ester
134870-02-3, 134932-34-6, 144489-99-6, 144490-01-7

3-Oxo-2-oxa-bicyclo[2.2.2]oct-7-ene-6-carboxylic acid allyl ester

Conditions
ConditionsYield
under 14251100 Torr; for 24h;95%
pyran-2-one
504-31-4

pyran-2-one

N,N-diallylacrylamide
3085-68-5

N,N-diallylacrylamide

3-Oxo-2-oxa-bicyclo[2.2.2]oct-7-ene-6-carboxylic acid diallylamide
134870-04-5, 134932-36-8

3-Oxo-2-oxa-bicyclo[2.2.2]oct-7-ene-6-carboxylic acid diallylamide

Conditions
ConditionsYield
under 14251100 Torr; for 24h;95%
methanethiosulfonic acid S-methyl ester
2949-92-0

methanethiosulfonic acid S-methyl ester

pyran-2-one
504-31-4

pyran-2-one

6-(methylthio)-2H-pyran-2-one

6-(methylthio)-2H-pyran-2-one

Conditions
ConditionsYield
Stage #1: pyran-2-one With 2,2,6,6-tetramethylpiperidinylmagnesium chloride lithium chloride complex In tetrahydrofuran at -40℃; for 0.25h; Schlenk technique; Inert atmosphere;
Stage #2: methanethiosulfonic acid S-methyl ester In tetrahydrofuran at -40 - 25℃; Schlenk technique; Inert atmosphere; regioselective reaction;
95%
pyran-2-one
504-31-4

pyran-2-one

2-oxa-3-oxobicyclo[2.2.0]hex-5-ene
22980-23-0

2-oxa-3-oxobicyclo[2.2.0]hex-5-ene

Conditions
ConditionsYield
In diethyl ether at -15℃; UV-irradiation;95%
pyran-2-one
504-31-4

pyran-2-one

3,3,4,4,7,7,8,8-octamethyl-3,4,7,8-tetrasilylcycloocta-1,5-diyne
85263-68-9

3,3,4,4,7,7,8,8-octamethyl-3,4,7,8-tetrasilylcycloocta-1,5-diyne

1,1,2,2,9,9,10,10-octamethyl-1,2,9,10-tetrasila<2.2>ortocyclophane
85263-70-3

1,1,2,2,9,9,10,10-octamethyl-1,2,9,10-tetrasila<2.2>ortocyclophane

Conditions
ConditionsYield
With triethylamine In toluene93%
maleic anhydride
108-31-6

maleic anhydride

pyran-2-one
504-31-4

pyran-2-one

3-Oxo-2-oxabicylo<2.2.2>oct-7-en-exo-5,exo-6-dicarbonsaeureanhydrid
1515-21-5, 26290-47-1

3-Oxo-2-oxabicylo<2.2.2>oct-7-en-exo-5,exo-6-dicarbonsaeureanhydrid

Conditions
ConditionsYield
In toluene at 55℃; under 3375270 Torr; for 12h;92%
In toluene at 20 - 110℃; Diels-Alder reaction;79%
In xylene at 90.5℃; Rate constant; Thermodynamic data; ΔH(excit.), ΔS(excit.); further temp.;
With toluene
pyran-2-one
504-31-4

pyran-2-one

benzyl vinyl ether
935-04-6

benzyl vinyl ether

(1R,4R,8R)-8-Benzyloxy-2-oxa-bicyclo[2.2.2]oct-5-en-3-one

(1R,4R,8R)-8-Benzyloxy-2-oxa-bicyclo[2.2.2]oct-5-en-3-one

Conditions
ConditionsYield
With (+)-Yb(tfc)3 In neat (no solvent) for 72h; Product distribution; Ambient temperature; further Lewis acids, also in solvent; other benzylic vinyl ether; variation of excess of benzyl vinyl ether;91%
With (+)-Yb(tfc)3 In neat (no solvent) for 72h; Ambient temperature;91%
pyran-2-one
504-31-4

pyran-2-one

2,2-dimethylpropylidynephosphine
78129-68-7

2,2-dimethylpropylidynephosphine

2-tert-Butyl-λ3-phosphinin
109827-19-2

2-tert-Butyl-λ3-phosphinin

Conditions
ConditionsYield
In benzene at 120℃; under 1875.1 - 2250.2 Torr; for 48h;91%
cyclooctyne
1781-78-8

cyclooctyne

pyran-2-one
504-31-4

pyran-2-one

5,6,7,8,9,10-hexahydrobenzocyclooctene
1076-69-3

5,6,7,8,9,10-hexahydrobenzocyclooctene

Conditions
ConditionsYield
for 72h; Ambient temperature;88%
pyran-2-one
504-31-4

pyran-2-one

benzyl vinyl ether
935-04-6

benzyl vinyl ether

8-Benzyloxy-2-oxa-bicyclo[2.2.2]oct-5-en-3-one

8-Benzyloxy-2-oxa-bicyclo[2.2.2]oct-5-en-3-one

Conditions
ConditionsYield
With (+)-Yb(tfc)3 In dichloromethane under 9000720 Torr; for 72h; Ambient temperature;88%
pyran-2-one
504-31-4

pyran-2-one

fumaryl dichloride
627-63-4

fumaryl dichloride

3-Oxo-2-oxabicyclo<2.2.2>oct-7-en-endo-5,exo-6-bis(carbonylchlorid)
82313-26-6

3-Oxo-2-oxabicyclo<2.2.2>oct-7-en-endo-5,exo-6-bis(carbonylchlorid)

Conditions
ConditionsYield
In toluene at 60℃; under 4125330 Torr; for 12h;86%
pyran-2-one
504-31-4

pyran-2-one

endo-tricyclo<4.2.2.02,5>deca-3,9-diene-7,8-dicarboxylate anhydride
51447-09-7

endo-tricyclo<4.2.2.02,5>deca-3,9-diene-7,8-dicarboxylate anhydride

C28H24O6
77884-58-3

C28H24O6

Conditions
ConditionsYield
In xylene for 2h; Heating;86%
pyran-2-one
504-31-4

pyran-2-one

4,4,5,5-tetramethyl-2-trimethylsilanylethynyl-[1,3,2]dioxaborolane
159087-46-4

4,4,5,5-tetramethyl-2-trimethylsilanylethynyl-[1,3,2]dioxaborolane

trimethyl(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)silane
910875-07-9

trimethyl(2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)silane

Conditions
ConditionsYield
at 170℃; for 15h;86%
In neat (no solvent) 1.5 equiv. of B compd., sealed, heated at 170°C for 17 h;86%
In 1,3,5-trimethyl-benzene 1.5 equiv. of B compd., sealed, heated at 170°C for 17 h;64%
In 1,3,5-trimethyl-benzene at 140°C for 48 h;56%
In diphenylether 1.5 equiv. of B compd., sealed, heated at 170°C for 17 h;56%
tetrafluoroboric acid diethyl ether
67969-82-8

tetrafluoroboric acid diethyl ether

pyran-2-one
504-31-4

pyran-2-one

(η5-C5H5)(Me)(NO)(PPh3)rhenium(II)

(η5-C5H5)(Me)(NO)(PPh3)rhenium(II)

{(C5H5)Re(NO)(P(C6H5)3)(OC5H4O)}(1+)*BF4(1-)={(C5H5)Re(NO)(P(C6H5)3)(OC5H4O)}BF4

{(C5H5)Re(NO)(P(C6H5)3)(OC5H4O)}(1+)*BF4(1-)={(C5H5)Re(NO)(P(C6H5)3)(OC5H4O)}BF4

Conditions
ConditionsYield
In dichloromethane soln. of complex cooled to -80°C, addn. of B-compd. with stirring, addn. of ligand after 5 min, warmed to 0°C over the course of 2h, kept at 0°C for 1h; concd. (vac.), dropwise addn. of ether, filtered, washed (ether), dried (vac.); elem. anal.;86%
pyran-2-one
504-31-4

pyran-2-one

methylmagnesium bromide
75-16-1

methylmagnesium bromide

sorbic acid
5309-56-8

sorbic acid

Conditions
ConditionsYield
With iron(III)-acetylacetonate In diethyl ether at -30℃; Inert atmosphere;86%
N-phenyl-maleimide
941-69-5

N-phenyl-maleimide

pyran-2-one
504-31-4

pyran-2-one

endo,endo-bis-N-phenylimide of bicyclo<2.2.2>oct-7-ene-2,3,5,6-tetracarboxylic acid
64856-70-8, 97643-47-5

endo,endo-bis-N-phenylimide of bicyclo<2.2.2>oct-7-ene-2,3,5,6-tetracarboxylic acid

Conditions
ConditionsYield
In xylene at 140℃;85%
pyran-2-one
504-31-4

pyran-2-one

1-methyl-4-(trimethylsilyl)-1H-indol-5-yl trifluoromethanesulfonate
1121707-11-6

1-methyl-4-(trimethylsilyl)-1H-indol-5-yl trifluoromethanesulfonate

3-methyl-3H-benzo[e]indole
23840-48-4

3-methyl-3H-benzo[e]indole

Conditions
ConditionsYield
With cesium fluoride In acetonitrile at 100℃; for 5h; Inert atmosphere;85%
With cesium fluoride In acetonitrile at 100℃;85%
pyran-2-one
504-31-4

pyran-2-one

hept-6-en-1-ylmagnesium bromide
154920-12-4

hept-6-en-1-ylmagnesium bromide

(-)-(R)-4-(hept-6-en-1-yl)-3,4-dihydro-2H-pyran-2-one
1417889-31-6

(-)-(R)-4-(hept-6-en-1-yl)-3,4-dihydro-2H-pyran-2-one

Conditions
ConditionsYield
Stage #1: hept-6-en-1-ylmagnesium bromide With copper(I) bromide dimethylsulfide complex; (R,S)-reverse-Josiphos In diethyl ether; tert-butyl methyl ether at -72℃; for 0.25h; Inert atmosphere; Schlenk technique;
Stage #2: pyran-2-one In diethyl ether; tert-butyl methyl ether at -72℃; Inert atmosphere; Schlenk technique; enantioselective reaction;
85%
pyran-2-one
504-31-4

pyran-2-one

dimethyl acetylenedicarboxylate
762-42-5

dimethyl acetylenedicarboxylate

phthalic acid dimethyl ester
131-11-3

phthalic acid dimethyl ester

Conditions
ConditionsYield
at 200℃; for 2h;84%
pyran-2-one
504-31-4

pyran-2-one

methyl 2-(7-hydroxy-3-methyl-5-(triflyloxy)bicyclo[4.2.0]octa-1,3,5-trien-7-yl)acetate

methyl 2-(7-hydroxy-3-methyl-5-(triflyloxy)bicyclo[4.2.0]octa-1,3,5-trien-7-yl)acetate

methyl 4-(1-(3-methylnaphthyl))-3-oxobutanoate

methyl 4-(1-(3-methylnaphthyl))-3-oxobutanoate

Conditions
ConditionsYield
With potassium carbonate In acetonitrile at 20℃; for 12h; Inert atmosphere;82%
pyran-2-one
504-31-4

pyran-2-one

(3-methylphenyl)(6-methyl-2-pyridyl)acetylene
74844-06-7

(3-methylphenyl)(6-methyl-2-pyridyl)acetylene

1-(3-methylphenyl)-2-(6-methyl-2-pyridyl)benzene
74844-07-8

1-(3-methylphenyl)-2-(6-methyl-2-pyridyl)benzene

Conditions
ConditionsYield
With hydroquinone In 1,2-dichloro-benzene for 72h; Heating;80%

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