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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

Ethyl 3-methyl-4-oxocrotonate

Cas:62054-49-3

Min.Order:1 Kilogram

FOB Price: $3.0

Type:Lab/Research institutions

inquiry

Ality Chemical Corporation

The above product is Ality Chemical's strong item with best price, good quality and fast supply. Ality Chemical has been focusing on the research and production of this field for over 14 years. At the same time, we are always committed to providi

Factory Supply ethyl (2E)-3-methyl-4-oxobut-2-enoate

Cas:62054-49-3

Min.Order:1

Negotiable

Type:Other

inquiry

Hebei Nengqian Chemical Import and Export Co., LTD

Our advantages: 1. All inquiries will be replied within 12 hours. 2. Dedication to quality, supply & service. 3. Strictly on selecting raw materials. 4. Reasonable & competitive price, fast lead time. 5. Sample is available for your eva

ETHYL 3-METHYL-4-OXOCROTONATE

Cas:62054-49-3

Min.Order:1 Kilogram

FOB Price: $9.0 / 99.0

Type:Trading Company

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 62054-49-3 with best quality

Cas:62054-49-3

Min.Order:1 Kilogram

FOB Price: $139.0 / 210.0

Type:Trading Company

inquiry

Qingdao Beluga Import and Export Co., LTD

ETHYL 3-METHYL-4-OXOCROTONATE CAS:62054-49-3 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 org

ETHYL 3-METHYL-4-OXOCROTONATE CAS:62054-49-3

Cas:62054-49-3

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

Ethyl 3-methyl-4-oxocrotonate

Cas:62054-49-3

Min.Order:1 Kilogram

Negotiable

Type:Lab/Research institutions

inquiry

Xiamen Hisunny Chemical Co.,Ltd

Best quality & Attractive price & Professional service; Trial & Pilot & Commercial Hisunny Chemical is a leading manufacturer and supplier of chemicals in China. We develop produce and distribute high quality intermediates, specia

Ethyl3-methyl-4-oxobut-2-enoate

Cas:62054-49-3

Min.Order:0

Negotiable

Type:Manufacturers

inquiry

Wuhan Han Sheng New Material Technology Co.,Ltd

Our 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

Ethyl 3-methyl-4-oxocrotonate

Cas:62054-49-3

Min.Order:10 Kilogram

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

Ethyl 3-methyl-4-oxocrotonate

Cas:62054-49-3

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

Ethyl 3-methyl-4-oxocrotonate

Cas:62054-49-3

Min.Order:10 Gram

FOB Price: $100.0

Type:Lab/Research institutions

inquiry

SHANGHAI SYSTEAM BIOCHEM CO., LTD

We 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

Ethyl 3-methyl-4-oxocrotonate

Cas:62054-49-3

Min.Order:100 Gram

FOB Price: $100.0 / 2000.0

Type:Lab/Research institutions

inquiry

Henan Tianfu Chemical Co., Ltd.

Our company was built in 2009 with an ISO certificate.In the past 5 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 o

62054-49-3 ETHYL 3-METHYL-4-OXOCROTONATE

Cas:62054-49-3

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

Henan Wentao Chemical Product Co., Ltd.

We are leading fine chemicals supplier in China with ISO certificate, Our main business covers the fields below: 1.Noble Metal Catalysts (Pt.Pd...) 2.Organic Phosphine Ligands (Tert-butyl-phosphine.Cyclohexyl-phosphine...) 3.OLED

Ethyl 3-methyl-4-oxocrotonateCAS NO.: 62054-49-3

Cas:62054-49-3

Min.Order:1 Gram

FOB Price: $2.0

Type:Lab/Research institutions

inquiry

EAST CHEMSOURCES LIMITED

factory?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

Ethyl 3-methyl-4-oxocrotonate

Cas:62054-49-3

Min.Order:1 Kilogram

FOB Price: $18.0 / 20.0

Type:Trading Company

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

Ethyl 3-methyl-4-oxocrotonate

Cas:62054-49-3

Min.Order:1 Gram

Negotiable

Type:Lab/Research institutions

inquiry

KAISA GROUP INC

1.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

Ethyl 3-methyl-4-oxocrotonate

Cas:62054-49-3

Min.Order:1 Metric Ton

FOB Price: $1.5

Type:Trading Company

inquiry

Bluecrystal chem-union

We 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

Ethyl 3-methyl-4-oxocrotonate

Cas:62054-49-3

Min.Order:1 Metric Ton

FOB Price: $1.0

Type:Trading Company

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

ethyl 3-methyl-4-oxocrotonate

Cas:62054-49-3

Min.Order:0

Negotiable

Type:Other

inquiry

GIHI CHEMICALS CO.,LIMITED

high purity,in stock Package:25kg/drum,or as per customers'demand Application:API,or Intermediates,fine chemicals Transportation:air,sea,courier

Ethyl 3-methyl-4-oxocrotonate

Cas:62054-49-3

Min.Order:0

Negotiable

Type:Lab/Research institutions

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 Ethyl 3-methyl-4-oxocrotonate 10ml

Cas:62054-49-3

Min.Order:1 bottle

Negotiable

Type:Lab/Research institutions

inquiry

Aecochem Corp.

Our clients, like BASF,CHEMO,Brenntag,ASR,Evonik,Merck and etc.Appearance:COA Storage:in stock Application:MSDS/TDS

Ethyl3-Methyl-4-Oxobut-2-Enoate

Cas:62054-49-3

Min.Order:0

Negotiable

Type:Manufacturers

inquiry

Wuxi TAA Chemical Industry Co.,LTD.

1.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 quality Ethyl 3-methyl-4-oxocrotonate cas NO.: 62054-49-3

Cas:62054-49-3

Min.Order:0

Negotiable

Type:Other

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

Ethyl 3-methyl-4-oxocrotonate

Cas:62054-49-3

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Hangzhou Ocean Chemical Co., Ltd.

★.Best quality according to requirement ★.Competitive price in China market ★.Mature Technical support ★.Professional logistic support

ETHYL 3-METHYL-4-OXOCROTONATE

Cas:62054-49-3

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Hubei Langyou International Trading Co., Ltd

Ethyl 3-methyl-4-oxocrotonate Application:Ethyl 3-methyl-4-oxocrotonate

Ethyl 3-methyl-4-oxocrotonate

Cas:62054-49-3

Min.Order:0

Negotiable

Type:Other

inquiry

BOC Sciences

We 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

ETHYL 3-METHYL-4-OXOCROTONATE

Cas:62054-49-3

Min.Order:0

Negotiable

Type:Trading Company

inquiry

Hangzhou Fandachem Co.,Ltd

Ethyl 3-methyl-4-oxocrotonate cas 62054-49-3Appearance:white crystalline powder Storage:Store in dry, dark and ventilated place Package:25KG drum Application:intermediate Transportation:by air, by sea, by express

Ethyl 3-methyl-4-oxocrotonate cas 62054-49-3

Cas:62054-49-3

Min.Order:0

Negotiable

Type:Other

inquiry

Hangzhou Sartort Biopharma Co., Ltd

Best quality with low price Storage:ln stock Package:25kg/Barrel Application:Chemicals Transportation:Express/Sea/Air Port:Shanghai

Ethyl3-methyl-4-oxocrotonate

Cas:62054-49-3

Min.Order:0

Negotiable

Type:Lab/Research institutions

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

Ethyl 3-methyl-4-oxocrotonate

Cas:62054-49-3

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Hangzhou ZeErRui Chemical Co., Ltd.

Hangzhou ZeErRui Chemical Co., Ltd. is focused on customization, research and development and production of APIs and advanced intermediates, which can effectively compensate for the deficiencies of traditional CRO and CMO. Priority of high-tech barri

Ethyl 3-methyl-4-oxocrotonate

Cas:62054-49-3

Min.Order:0

Negotiable

Type:Lab/Research institutions

inquiry

Synthetic route

ethyl (E)-4-hydroxy-3-methyl-2-butenoate
65527-85-7

ethyl (E)-4-hydroxy-3-methyl-2-butenoate

ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

Conditions
ConditionsYield
With manganese(IV) oxide In dichloromethane at 25℃; for 1h;92%
With manganese(IV) oxide In dichloromethane for 3h; Ambient temperature;79%
With manganese(IV) oxide; calcium sulfate In dichloromethane for 1h; Ambient temperature;72%
ethyl (E/Z)-4,4-dimethoxy-3-methylbut-2-enoate
83803-81-0

ethyl (E/Z)-4,4-dimethoxy-3-methylbut-2-enoate

ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

Conditions
ConditionsYield
With hydrogenchloride In dichloromethane for 1.5h;78%
With sulfuric acid In water70%
With hydrogenchloride In 1,4-dioxane for 4h; Ambient temperature;53%
(E)-4,4-Dimethoxy-3-methyl-crotonsaeureaethylester
65527-84-6

(E)-4,4-Dimethoxy-3-methyl-crotonsaeureaethylester

ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

Conditions
ConditionsYield
With sodium acetate In water; acetic acid for 3.5h; Heating;69.8%
With hydrogenchloride In dichloromethane; water at 0℃; for 2h; Inert atmosphere;
ethyl (E)-4-bromo-3-methyl-2-butenoate
51318-62-8

ethyl (E)-4-bromo-3-methyl-2-butenoate

ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

Conditions
ConditionsYield
With sulfuric acid In water42%
ethyl 2-ethoxyglycolate
49653-17-0

ethyl 2-ethoxyglycolate

propionaldehyde
123-38-6

propionaldehyde

ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

Conditions
ConditionsYield
With dibutylamine
3-Methyl-4--crotonsaeureethylester
97361-72-3

3-Methyl-4--crotonsaeureethylester

ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

Conditions
ConditionsYield
With sulfuric acid
4-hydroxy-3-methyl-trans(?)-crotonic acid ethyl ester

4-hydroxy-3-methyl-trans(?)-crotonic acid ethyl ester

ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

Conditions
ConditionsYield
With manganese(IV) oxide; Petroleum ether
diethoxyphosphoryl-acetic acid ethyl ester
867-13-0

diethoxyphosphoryl-acetic acid ethyl ester

Pyruvic aldehyde dimethyl acetal
6342-56-9

Pyruvic aldehyde dimethyl acetal

ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

Conditions
ConditionsYield
Stage #1: diethoxyphosphoryl-acetic acid ethyl ester; Pyruvic aldehyde dimethyl acetal With sodium hydride In N,N-dimethyl-formamide at 0℃; for 1h;
Stage #2: With hydrogenchloride; water In dichloromethane at 20℃; for 3h;
ethyl 3-methylbut-2-enoate
638-10-8

ethyl 3-methylbut-2-enoate

ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: 90 percent / SeO2 / aq. ethanol / 24 h / Heating
2: 72 percent / CaSO4, MnO2 / CH2Cl2 / 1 h / Ambient temperature
View Scheme
Multi-step reaction with 2 steps
1: N-bromosuccinimide, d'acide m-chloroperbenzoique / CCl4
2: 42 percent / H2SO4 / H2O
View Scheme
Multi-step reaction with 3 steps
1: Br2
2: (i) Py, (ii) /BRN= 607293/, NaOH
3: aq. H2SO4
View Scheme
β,γ-epoxy-isovaleric acid ethyl ester
344248-78-8

β,γ-epoxy-isovaleric acid ethyl ester

ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: hexamethylphosphoric amide / 2 h / Ambient temperature
2: 79 percent / activated MnO2 / CH2Cl2 / 3 h / Ambient temperature
View Scheme
ethyl 4-bromo-3-methylcrotonate
51318-62-8, 51371-55-2, 26918-14-9

ethyl 4-bromo-3-methylcrotonate

ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: (i) Py, (ii) /BRN= 607293/, NaOH
2: aq. H2SO4
View Scheme
diethyl (2R,3R)-tartrate
87-91-2

diethyl (2R,3R)-tartrate

2-(triphenylphosphoranylidene)propionaldehyde
24720-64-7

2-(triphenylphosphoranylidene)propionaldehyde

ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

Conditions
ConditionsYield
With NaIO4 on SiO2 In dichloromethane at 20℃;
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

acetic anhydride
108-24-7

acetic anhydride

(E)-ethyl 3-methyl-4-diacetoxycrotonate
283179-31-7

(E)-ethyl 3-methyl-4-diacetoxycrotonate

Conditions
ConditionsYield
With iron(III) chloride at 0℃; for 0.5h;99%
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

ethyl (E)-4-hydroxy-3-methyl-2-butenoate
65527-85-7

ethyl (E)-4-hydroxy-3-methyl-2-butenoate

Conditions
ConditionsYield
With sodium tetrahydroborate In methanol at 0 - 20℃;98%
With sodium tetrahydroborate In methanol at 0 - 20℃; for 16h; chemoselective reaction;90%
With sodium tetrahydroborate In ethanol for 0.25h;3.9 g
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

ethylene glycol
107-21-1

ethylene glycol

ethyl (E)-4,4-ethylenedioxy-3-methylbut-2-enoate
65527-87-9

ethyl (E)-4,4-ethylenedioxy-3-methylbut-2-enoate

Conditions
ConditionsYield
With pyridinium p-toluenesulfonate In benzene for 4h; Heating;91%
With pyridinium p-toluenesulfonate89%
With pyridinium p-toluenesulfonate In benzene for 12h; Heating;
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

(7E)-9-ethynyl-β-ionol
17974-59-3

(7E)-9-ethynyl-β-ionol

ethyl 9-(2',6',6'-trimethyl-1'-cyclohexen-1'-yl)-3,7-dimethyl-4,7-dihydroxy-(2E,8E)-nona-2,8-dien-5-ynoate
95286-43-4, 118304-67-9, 118333-95-2

ethyl 9-(2',6',6'-trimethyl-1'-cyclohexen-1'-yl)-3,7-dimethyl-4,7-dihydroxy-(2E,8E)-nona-2,8-dien-5-ynoate

Conditions
ConditionsYield
With ethylmagnesium bromide90%
With ethylmagnesium bromide 1.) THF, room temperature, 1 h, 2.) THF, 15 min; Yield given. Multistep reaction;
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

(3,7-dimethyl-2,6-octadienyl)-triphenylphosphonium bromide
41273-34-1

(3,7-dimethyl-2,6-octadienyl)-triphenylphosphonium bromide

ethyl (2E,4E,6E)-3,7,11-trimethyldodeca-2,4,6,10-tetraenoate
29448-58-6, 37384-80-8, 51010-81-2, 51010-78-7

ethyl (2E,4E,6E)-3,7,11-trimethyldodeca-2,4,6,10-tetraenoate

Conditions
ConditionsYield
With n-butyllithium In tetrahydrofuran at 20℃; Condensation; Wittig reaction;90%
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

(2R,3R)-ethyl 4-(benzyldimethylsilyl)-2-hydroxy-3-(trimethylsilyl)pent-4-enoate

(2R,3R)-ethyl 4-(benzyldimethylsilyl)-2-hydroxy-3-(trimethylsilyl)pent-4-enoate

ethyl 4-(benzyldimethylsilyl)-6-((E)-4-ethoxy-4-oxobut-2-en-2-yl)-5,6-dihydro-2H-pyran-2-carboxylate

ethyl 4-(benzyldimethylsilyl)-6-((E)-4-ethoxy-4-oxobut-2-en-2-yl)-5,6-dihydro-2H-pyran-2-carboxylate

Conditions
ConditionsYield
With trimethylsilyl trifluoromethanesulfonate In dichloromethane at -20℃; for 1.5h; Inert atmosphere; diastereoselective reaction;90%
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

Methyltriphenylphosphonium bromide
1779-49-3

Methyltriphenylphosphonium bromide

methyl-3 pentadiene-2,4 oate d'ethyle E
37850-26-3

methyl-3 pentadiene-2,4 oate d'ethyle E

Conditions
ConditionsYield
Stage #1: Methyltriphenylphosphonium bromide With n-butyllithium In tetrahydrofuran; hexane at -78 - 0℃; for 1h; Schlenk technique;
Stage #2: ethyl (E)-3-formyl-2-butenoate In tetrahydrofuran; hexane at 0℃; for 0.5h; Schlenk technique;
89%
Stage #1: Methyltriphenylphosphonium bromide With n-butyllithium In tetrahydrofuran; hexane at -78 - 0℃; Wittig reaction;
Stage #2: ethyl (E)-3-formyl-2-butenoate In tetrahydrofuran; hexane at -78 - 20℃; Wittig reaction;
83%
Stage #1: Methyltriphenylphosphonium bromide With n-butyllithium In tetrahydrofuran; hexane at -78 - 0℃; for 1h;
Stage #2: ethyl (E)-3-formyl-2-butenoate In tetrahydrofuran; hexane at -78 - 20℃; for 10h;
40%
Stage #1: Methyltriphenylphosphonium bromide With n-butyllithium In tetrahydrofuran; hexane at -78 - 110℃; Inert atmosphere;
Stage #2: ethyl (E)-3-formyl-2-butenoate In tetrahydrofuran; hexane at -45℃; Inert atmosphere;
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

1-bromo-2-ethyl-3,4-dimethoxybenzene
1353851-85-0

1-bromo-2-ethyl-3,4-dimethoxybenzene

(E) ethyl 4-(2-ethyl-3,4-dimethoxyphenyl)-4-hydroxy-3-methylbut-2-enoate

(E) ethyl 4-(2-ethyl-3,4-dimethoxyphenyl)-4-hydroxy-3-methylbut-2-enoate

Conditions
ConditionsYield
Stage #1: 1-bromo-2-ethyl-3,4-dimethoxybenzene With ethyl bromide; iodine; magnesium In tetrahydrofuran for 1h; Reflux;
Stage #2: ethyl (E)-3-formyl-2-butenoate In tetrahydrofuran at 0 - 20℃; for 12h;
Stage #3: With hydrogenchloride In tetrahydrofuran; water
89%
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

(5Z,7E)-(1S,3R)-1,3-bis[(t-butyldimethyl-silyl)oxy]-24-phenylsulfonyl-22,23-dinor-9,10-secochola-5,7,10(19)-triene
223538-02-1

(5Z,7E)-(1S,3R)-1,3-bis[(t-butyldimethyl-silyl)oxy]-24-phenylsulfonyl-22,23-dinor-9,10-secochola-5,7,10(19)-triene

ethyl (5Z,7E,23aE)-(1S,3R)-1,3-bis[(t-butyldimethylsilyl)oxy]-22-phenylsulfonyl-23-hydroxy-23a-methyl-23a,23b-dihomo-9,10-secochola-5,7,10(19),23-tetraene-24-oate

ethyl (5Z,7E,23aE)-(1S,3R)-1,3-bis[(t-butyldimethylsilyl)oxy]-22-phenylsulfonyl-23-hydroxy-23a-methyl-23a,23b-dihomo-9,10-secochola-5,7,10(19),23-tetraene-24-oate

Conditions
ConditionsYield
With n-butyllithium In tetrahydrofuran at -70℃; for 0.25h;88%
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

4-methoxyphenylhydrazine hydrochloride
19501-58-7

4-methoxyphenylhydrazine hydrochloride

(2E,4E)-4-[2-(4-methoxyphenyl)hydrazono]-3-methyl-2-butenoic acid ethyl ester

(2E,4E)-4-[2-(4-methoxyphenyl)hydrazono]-3-methyl-2-butenoic acid ethyl ester

Conditions
ConditionsYield
With pyridine at 20℃; for 0.5h;87%
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

hex-1-yne
693-02-7

hex-1-yne

ethyl (E)-4-hydroxy-3-methyldec-2-en-5-ynoate

ethyl (E)-4-hydroxy-3-methyldec-2-en-5-ynoate

Conditions
ConditionsYield
Stage #1: hex-1-yne With n-butyllithium In tetrahydrofuran; hexane for 1h; Inert atmosphere; Cooling with acetone-dry ice;
Stage #2: ethyl (E)-3-formyl-2-butenoate In tetrahydrofuran; hexane at 20℃; Inert atmosphere;
86%
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

C41H65NO4S2Si2

C41H65NO4S2Si2

C41H70O4Si2

C41H70O4Si2

Conditions
ConditionsYield
With lithium hexamethyldisilazane Julia Olefin Synthesis;85%
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

(S)-p-toluenesulfinimide
188447-91-8

(S)-p-toluenesulfinimide

C14H17NO3S

C14H17NO3S

Conditions
ConditionsYield
With titanium(IV) tetraethanolate In dichloromethane for 6h; Inert atmosphere; Reflux;84%
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

[(2E,4E)-5-(2-Acetoxymethyl-6,6-dimethyl-cyclohex-1-enyl)-3-methyl-penta-2,4-dienyl]-triphenyl-phosphonium; bromide
81121-47-3

[(2E,4E)-5-(2-Acetoxymethyl-6,6-dimethyl-cyclohex-1-enyl)-3-methyl-penta-2,4-dienyl]-triphenyl-phosphonium; bromide

A

(2E,4E,6E,8E)-9-(2-Hydroxymethyl-6,6-dimethyl-cyclohex-1-enyl)-3,7-dimethyl-nona-2,4,6,8-tetraenoic acid ethyl ester
81121-49-5, 81176-72-9

(2E,4E,6E,8E)-9-(2-Hydroxymethyl-6,6-dimethyl-cyclohex-1-enyl)-3,7-dimethyl-nona-2,4,6,8-tetraenoic acid ethyl ester

B

(2E,4Z,6E,8E)-9-(2-Acetoxymethyl-6,6-dimethyl-cyclohex-1-enyl)-3,7-dimethyl-nona-2,4,6,8-tetraenoic acid ethyl ester
81121-48-4

(2E,4Z,6E,8E)-9-(2-Acetoxymethyl-6,6-dimethyl-cyclohex-1-enyl)-3,7-dimethyl-nona-2,4,6,8-tetraenoic acid ethyl ester

C

ethyl (2E,4E,6E,8E)-9-<2-(acetoxymethyl)-6,6-dimethyl-1-cyclohexen-1-yl>-3,7-dimethyl-2,4,6,8-nonatetraenoate
81176-71-8

ethyl (2E,4E,6E,8E)-9-<2-(acetoxymethyl)-6,6-dimethyl-1-cyclohexen-1-yl>-3,7-dimethyl-2,4,6,8-nonatetraenoate

Conditions
ConditionsYield
With sodium methylate In methanol; dichloromethane at 0 - 5℃; for 0.166667h;A n/a
B n/a
C 81%
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

acetone
67-64-1

acetone

ethyl (E)-4-hydroxy-3-methyl-6-oxohept-2-enoate

ethyl (E)-4-hydroxy-3-methyl-6-oxohept-2-enoate

Conditions
ConditionsYield
With chiral binaphthyl-based amino acid In N,N-dimethyl-formamide at 20℃; for 24h;81%
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

(2S)-ethoxy-(4S)-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydro-2H-pyran
596093-06-0

(2S)-ethoxy-(4S)-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydro-2H-pyran

ethyl-(2E,4R)-4-[(2R,6S)-6-ethoxy-5,6-dihydro-2H-pyran-2-yl]-4-hydroxy-3-methylbut-2-enoate
890527-60-3

ethyl-(2E,4R)-4-[(2R,6S)-6-ethoxy-5,6-dihydro-2H-pyran-2-yl]-4-hydroxy-3-methylbut-2-enoate

Conditions
ConditionsYield
Stage #1: ethyl (E)-3-formyl-2-butenoate; (2S)-ethoxy-(4S)-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,4-dihydro-2H-pyran at 50℃; for 5h; Inert atmosphere;
Stage #2: With water; sodium hydrogencarbonate for 0.5h; Inert atmosphere; Saturated solution;
81%
at 25℃; for 24h;476 mg
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

1-(3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydronaphthalenyl)ethanone
17610-24-1

1-(3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydronaphthalenyl)ethanone

ethyl (E)-4-hydroxy-3-methyl-6-oxo-(3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydro-2-naphthalenyl)-2-hexenoate
156910-46-2

ethyl (E)-4-hydroxy-3-methyl-6-oxo-(3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydro-2-naphthalenyl)-2-hexenoate

Conditions
ConditionsYield
With n-butyllithium; diisopropylamine In tetrahydrofuran; hexane80%
With n-butyllithium; diisopropylamine 1.) THF, hexane, -78 deg C, 20 min, 2.) THF, hexane, -78 deg C, 35 min; Yield given. Multistep reaction;
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

(triphenylphosphoranylidene)acetaldehyde
2136-75-6

(triphenylphosphoranylidene)acetaldehyde

ethyl (2E,4E)-3-methyl-6-oxo-2,4-hexadienoate
35482-69-0

ethyl (2E,4E)-3-methyl-6-oxo-2,4-hexadienoate

Conditions
ConditionsYield
In dichloromethane at 20℃; for 15h; Wittig reaction;80%
In dichloromethane at 20℃; for 15h; optical yield given as %de;80%
In dichloromethane at 20℃; for 14h; Wittig reaction;68%
In dichloromethane at 20℃; for 15h; Inert atmosphere;
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

(triphenylphosphoranylidene)acetaldehyde
2136-75-6

(triphenylphosphoranylidene)acetaldehyde

A

ethyl (2E,4E)-3-methyl-6-oxo-2,4-hexadienoate
35482-69-0

ethyl (2E,4E)-3-methyl-6-oxo-2,4-hexadienoate

B

C11H14O3
1221294-61-6

C11H14O3

Conditions
ConditionsYield
In dichloromethane at 20℃; for 15h; Wittig reaction; stereoselective reaction;A 80%
B 2.7%
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

A

TRICARBONYL{1-4-η-[(1E,3E)-1-ETHOXYCARBONYL-2-METHYL-5-OXO-1,3-PENTADIENYL]}IRON

TRICARBONYL{1-4-η-[(1E,3E)-1-ETHOXYCARBONYL-2-METHYL-5-OXO-1,3-PENTADIENYL]}IRON

B

ethyl (E)-4-hydroxy-3-methyl-2-butenoate
65527-85-7

ethyl (E)-4-hydroxy-3-methyl-2-butenoate

Conditions
ConditionsYield
A n/a
B 76%
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

(2S,3R,4R)-2-Ethoxy-3-(3-methyl-but-2-enyl)-4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-3,4-dihydro-2H-pyran

(2S,3R,4R)-2-Ethoxy-3-(3-methyl-but-2-enyl)-4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-3,4-dihydro-2H-pyran

(E)-(R)-4-[(2R,5R,6S)-6-Ethoxy-5-(3-methyl-but-2-enyl)-5,6-dihydro-2H-pyran-2-yl]-4-hydroxy-3-methyl-but-2-enoic acid ethyl ester
848188-00-1

(E)-(R)-4-[(2R,5R,6S)-6-Ethoxy-5-(3-methyl-but-2-enyl)-5,6-dihydro-2H-pyran-2-yl]-4-hydroxy-3-methyl-but-2-enoic acid ethyl ester

Conditions
ConditionsYield
at 110℃; for 48h;76%
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

triphenyl-(2,3,3-trimethyl-cyclohex-1-enylmethyl)-phosphonium; iodide

triphenyl-(2,3,3-trimethyl-cyclohex-1-enylmethyl)-phosphonium; iodide

(2E,4E)-[3-methyl-5-(2',3',3'-trimethylcyclohex-1'-enyl)penta-2,4-dienoate d'ethyle]

(2E,4E)-[3-methyl-5-(2',3',3'-trimethylcyclohex-1'-enyl)penta-2,4-dienoate d'ethyle]

Conditions
ConditionsYield
Stage #1: triphenyl-(2,3,3-trimethyl-cyclohex-1-enylmethyl)-phosphonium; iodide With n-butyllithium In tetrahydrofuran; hexane at -10℃; for 0.25h; Wittig reaction;
Stage #2: ethyl (E)-3-formyl-2-butenoate In tetrahydrofuran; hexane at -10℃; for 5h; Wittig reaction;
Stage #3: With hydrogenchloride In tetrahydrofuran; hexane
75%
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

Dimethyl-(3-methyl-but-2-enyl)-sulfonium; chloride
81121-25-7

Dimethyl-(3-methyl-but-2-enyl)-sulfonium; chloride

(E)-3-[3-(2-Methyl-propenyl)-oxiranyl]-but-2-enoic acid ethyl ester
81121-26-8, 81177-14-2

(E)-3-[3-(2-Methyl-propenyl)-oxiranyl]-but-2-enoic acid ethyl ester

Conditions
ConditionsYield
With sodium hydroxide; N-benzyl-N,N,N-triethylammonium chloride In dichloromethane at 0℃; for 0.333333h;74%
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

(2S,3R,4R)-2-Ethoxy-3-heptyl-4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-3,4-dihydro-2H-pyran
848187-89-3

(2S,3R,4R)-2-Ethoxy-3-heptyl-4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-3,4-dihydro-2H-pyran

ethyl-(2E,4R)-4-[(2R,5R,6S)-6-ethoxy-5-heptyl-5,6-dihydro-2H-pyran-2-yl]-4-hydroxy-3-methylbut-2-enoate
848187-90-6

ethyl-(2E,4R)-4-[(2R,5R,6S)-6-ethoxy-5-heptyl-5,6-dihydro-2H-pyran-2-yl]-4-hydroxy-3-methylbut-2-enoate

Conditions
ConditionsYield
at 110℃; for 48h;74%
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

N,N-diisopropylhydrazine
921-14-2

N,N-diisopropylhydrazine

ethyl (2E, 4E)-4-(2,2-diisopropylhydrazono)-3-methylbut-2-enoate

ethyl (2E, 4E)-4-(2,2-diisopropylhydrazono)-3-methylbut-2-enoate

Conditions
ConditionsYield
With magnesium sulfate In dichloromethane at 23℃; for 24h; Inert atmosphere;74%
ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

1,1-dimethylhydrazine
57-14-7

1,1-dimethylhydrazine

ethyl (2E,4Z)-4-(2,2-dimethylhydrazono)-3-methylbut-2-enoate

ethyl (2E,4Z)-4-(2,2-dimethylhydrazono)-3-methylbut-2-enoate

Conditions
ConditionsYield
With magnesium sulfate In dichloromethane at 23℃; for 24h; Inert atmosphere;74%
2,5,5-trimethylpyrroline N-oxide
4567-18-4

2,5,5-trimethylpyrroline N-oxide

ethyl (E)-3-formyl-2-butenoate
62054-49-3

ethyl (E)-3-formyl-2-butenoate

3-methyl-5-(5,5-dimethyl-1-oxide-4,5-dihydro-3H-pyrrol-2-yl)penta-2,4-dienoic acid ethyl ester

3-methyl-5-(5,5-dimethyl-1-oxide-4,5-dihydro-3H-pyrrol-2-yl)penta-2,4-dienoic acid ethyl ester

Conditions
ConditionsYield
In toluene at 110℃; for 3h;72%

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