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Cas Database

105-45-3

105-45-3

Identification

  • Product Name:Butanoic acid, 3-oxo-,methyl ester

  • CAS Number: 105-45-3

  • EINECS:203-299-8

  • Molecular Weight:116.117

  • Molecular Formula: C5H8O3

  • HS Code:29183000

  • Mol File:105-45-3.mol

Synonyms:Acetoaceticacid, methyl ester (6CI,8CI);3-Oxobutanoic acid methyl ester;3-Oxobutyricacid methyl ester;Acetoacetate methyl ester;Methyl 3-oxobutanoate;Methyl3-oxobutyrate;Methyl acetylacetate;

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Safety information and MSDS view more

  • Pictogram(s):IrritantXi

  • Hazard Codes:Xi

  • Signal Word:Warning

  • Hazard Statement:H319 Causes serious eye irritation

  • First-aid measures: General adviceConsult a physician. Show this safety data sheet to the doctor in attendance.If inhaled Fresh air, rest. Refer for medical attention. In case of skin contact Remove contaminated clothes. Rinse skin with plenty of water or shower. In case of eye contact First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. If swallowed Rinse mouth. Do NOT induce vomiting. Give one or two glasses of water to drink. Refer for medical attention . May be harmful by inhalation, ingestion, or skin absorption. Causes eye irritation. May cause skin irritation. (USCG, 1999) Basic treatment: Establish a patent airway. Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if needed. Administer oxygen by nonrebreather mask at 10 to 15 L/min. Monitor for pulmonary edema and treat if necessary ... . Monitor for shock and treat if necessary ... . Anticipate seizures and treat if necessary ... . For eye contamination, flush eyes immediately with water. Irrigate each eye continuously with normal saline during transport ... . Do not use emetics. For ingestion, rinse mouth and administer 5 ml/kg up to 200 ml of water for dilution if the patient can swallow, has a strong gag reflex, and does not drool ... . Cover skin burns with dry sterile dressings after decontamination ... . /Poison A and B/

  • Fire-fighting measures: Suitable extinguishing media ... /Use/ foam, carbon dioxide, dry chemical. Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]: HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water. Substance may be transported hot. For hybrid vehicles, ERG Guide 147 (lithium ion batteries) or ERG Guide 138 (sodium batteries) should also be consulted. If molten aluminum is involved, refer to ERG Guide 169. (ERG, 2016) Wear self-contained breathing apparatus for firefighting if necessary.

  • Accidental release measures: Use personal protective equipment. Avoid dust formation. Avoid breathing vapours, mist or gas. Ensure adequate ventilation. Evacuate personnel to safe areas. Avoid breathing dust. For personal protection see section 8. Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Ventilation. Collect leaking and spilled liquid in sealable containers as far as possible. Wash away remainder with plenty of water. Pick up and arrange disposal. Sweep up and shovel. Keep in suitable, closed containers for disposal.

  • Handling and storage: Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Avoid exposure - obtain special instructions before use.Provide appropriate exhaust ventilation at places where dust is formed. For precautions see section 2.2. Separated from oxidants.

  • Exposure controls/personal protection:Occupational Exposure limit valuesBiological limit values Handle in accordance with good industrial hygiene and safety practice. Wash hands before breaks and at the end of workday. Eye/face protection Safety glasses with side-shields conforming to EN166. Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU). Skin protection Wear impervious clothing. The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace. Handle with gloves. Gloves must be inspected prior to use. Use proper glove removal technique(without touching glove's outer surface) to avoid skin contact with this product. Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices. Wash and dry hands. The selected protective gloves have to satisfy the specifications of EU Directive 89/686/EEC and the standard EN 374 derived from it. Respiratory protection Wear dust mask when handling large quantities. Thermal hazards

Supplier and reference price

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  • Manufacture/Brand:TRC
  • Product Description:Methyl acetoacetate
  • Packaging:100g
  • Price:$ 225
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  • Manufacture/Brand:TCI Chemical
  • Product Description:Methyl Acetoacetate >99.0%(GC)
  • Packaging:25g
  • Price:$ 13
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  • Manufacture/Brand:TCI Chemical
  • Product Description:Methyl Acetoacetate >99.0%(GC)
  • Packaging:500g
  • Price:$ 24
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  • Manufacture/Brand:SynQuest Laboratories
  • Product Description:Methyl acetoacetate
  • Packaging:5 kg
  • Price:$ 240
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  • Manufacture/Brand:SynQuest Laboratories
  • Product Description:Methyl acetoacetate
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  • Manufacture/Brand:Sigma-Aldrich
  • Product Description:Methyl acetoacetate Lonza quality, ≥99% (GC)
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  • Price:$ 2330
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  • Manufacture/Brand:Sigma-Aldrich
  • Product Description:Methyl acetoacetate for synthesis. CAS 105-45-3, EC Number 203-299-8, chemical formula CH COCH COOCH ., for synthesis
  • Packaging:8001070100
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  • Manufacture/Brand:Sigma-Aldrich
  • Product Description:Methyl acetoacetate for synthesis
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  • Manufacture/Brand:Sigma-Aldrich
  • Product Description:Methyl acetoacetate for synthesis. CAS 105-45-3, EC Number 203-299-8, chemical formula CH COCH COOCH ., for synthesis
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  • Manufacture/Brand:Sigma-Aldrich
  • Product Description:Methyl acetoacetate for synthesis
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Relevant articles and documentsAll total 71 Articles be found

Synthesis of methyl acetoacetate from acetone and dimethyl carbonate with alkali-promoted MgO catalysts

Wu, Dudu,Chen, Zhi

, p. 758 - 766 (2010)

The synthesis of methyl acetoacetate (MAA) by methoxycarbonylation of acetone with dimethyl carbonate (DMC) was carried out in the presence of MgO and alkali-promoted MgO catalysts. From among Li, Na, K, and Cs, potassium was found to be the most effective promoter to improve the activity of MgO. The effect of K/MgO with variable content of K was also investigated, and the individual catalysts were characterised by the XRD, BET, SEM, CO2-TPD, and in situ CO2 IR techniques. The results showed that the addition of a small amount of K (1.97 mass %) could promote MAA formation, but a higher K loading caused a decrease in the yield of MAA, which might result from particle agglomeration and the presence of stable potassium carbonates. In situ FTIR experiments of co-adsorbed reactants indicated that the reaction probably proceeded via abstraction of Hα from acetone by base sites.

-

Tezuka et al.

, p. 443 (1969)

-

-

Royals

, p. 489 (1948)

-

Catalytic Dimerization of Ketene. A Simple and Convenient Method for the Preparation of Diketene and Esters of Acetoacetic Acid

Jarowicki, Krzysztof,Kwitakowski, Stefan

, p. 141 - 144 (1985)

A new method for the preparation of diketene is described.The main feature of the procedure is the dimerization of ketene in the presence of tetramethylethylenediamine (TMEDA) and the direct use of crude diketene in the syntheses of acetoacetic esters.Keywords: Dimerization of ketene; Tetramethylethylenediamine, catalytic action of

Asymmetric Aerobic Epoxidation of Unfunctionalized Olefins Catalyzed by Optically Active α-Alkoxycarbonyl-β-ketoiminato Manganese(III) Complexes

Mukaiyama, Teruaki,Yamada, Tohru,Nagata, Takushi,Imagawa, Kiyomi

, p. 327 - 330 (1993)

Optically active N,N'-ethylenebis(α-alkoxycarbonyl-β-ketoimine) was found to be a new class of effective ligand of manganese(III) complex catalyst for the asymmetric aerobic epoxidation of simple olefins, such as 1,2-dihydronaphthalene derivatives, to afford the corresponding optically active epoxides with good to high enantioselectivities.

Synthesis of β-keto esters by carbonylation of halomethylketones

Lapidus,Eliseev,Bondarenko,Sizan,Ostapenko,Beletskaya

, p. 317 - 319 (2002)

A number of β-keto esters were synthesized by Pd-catalyzed carbonylation of halomethylketones in the presence of tributylamine in 68-86percent yields. The reaction is completed in 2 hours at 110°C and 10 bar CO pressure. Chloromethylketones are carbonylated selectively while 2-bromoacetophenone is partly reduced to acetophenone as a byproduct. The reaction can be carried out at atmospheric pressure though the rate stays low. The reaction mechanism is discussed.

New method of zinc activation by electrochemistry: synthetic applications to the Blaise reaction

Zylber, N.,Zylber, J.,Rollin, Y.,Dunach, E.,Perichon, J.

, p. 1 - 4 (1993)

A new electrochemical zinc metal activation method based on the cathodic reduction of a catalytic amount of zinc bromide in the presence of a zinc anode is described.This procedure is applied to the coupling of α-bromoesters with nitriles, and affords β-ketoesters in good yield.

Inversion of cpADH5 Enantiopreference and Altered Chain Length Specificity for Methyl 3-Hydroxyalkanoates

Ensari, Yunus,Dhoke, Gaurao V.,Davari, Mehdi D.,Bocola, Marco,Ruff, Anna Jo?lle,Schwaneberg, Ulrich

, p. 12636 - 12645 (2017)

Expanding the substrate scope of enzymes opens up new routes for synthesis of valuable chemicals. Ketone-functionalized fatty acid derivatives and corresponding chiral alcohols are valuable building blocks for the synthesis of a variety of chemicals including pharmaceuticals. The alcohol dehydrogenase from Candida parapsilosis (cpADH5) catalyzes the reversible oxidations of chiral alcohols and has a broad substrate range; a challenge for cpADH5 is to convert alcohols with small substituents (methyl or ethyl) next to the oxidized alcohol moiety. Molecular docking studies revealed that W286 is located in the small binding pocket and limits the access to substrates that contain aliphatic chains longer than ethyl substituent. In the current manuscript, we report that positions L119 and W286 are key residues to boost oxidation of medium chain methyl 3-hydroxy fatty acids; interestingly the enantiopreference toward methyl 3-hydroxybutyrate was inverted. Kinetic characterization of W286A showed a 5.5 fold increase of Vmax and a 9.6 fold decrease of Km values toward methyl 3-hydroxyhexanoate (Vmax: 2.48 U mg? and Km: 4.76 mm). Simultaneous saturation at positions 119 and 286 library yielded a double mutant (L119M/W286S) with more than 30-fold improved activity toward methyl 3-hydroxyoctanoate (WT: no conversion; L119M/W286S: 30 %) and inverted enantiopreference (S-enantiomer ≥99 % activity decrease and R-enantiomer >20-fold activity improvement) toward methyl 3-hydroxybutyrate.

Carbonylation of chloroacetone to methyl acetoacetate

Lapidus,Eliseev,Bondarenko,Sizan,Ostapeako

, p. 2239 - 2241 (2001)

Methyl acetoacetate was prepared by the selective carbonylation of chloroacetone in the presence of a homogeneous palladium catalyst at 100 °C and under a CO pressure of 1.5 MPa.

-

Ogibin,Yu.N.,Nikishin,G.I.

, (1965)

-

A NEW PREPARATIVE METHOD FOR 1,3-DICARBONYL COMPOUNDS BY THE REGIOSELECTIVE OXIDATION OF α,β-UNSATURATED CARBONYL COMPOUNDS, CATALYZED BY PdCl2 USING HYDROGENPEROXIDES AS THE REOXIDANT OF Pd0

Tsuji, Jiro,Nagashima, Hideo,Hori, Kimihiko

, p. 257 - 260 (1980)

α,β-Unsaturated esters and ketones are oxidized regioselectively to give β-keto esters and 1,3-diketones in good yields in aqueous acetic acid using Na2PdCl4 as the catalyst and t-butyl hydroperoxide or hydrogen peroxide as the reoxidant of Pd0.

Versatile PdTe/C catalyst for liquid-phase oxidations of 1,3-butadiene

Kuznetsova,Zudin,Kuznetsova,Zaikovskii,Kajitani,Utsunomiya,Takahashi

, p. 30 - 38 (2016)

A commercial Pd catalyst based on Sibunit carbon support was treated with H6TeO6 in a reducing media to obtain a Te coating on the surface of Pd particles. The PdTe/C catalyst prepared in this way showed the ability to control the radical chain oxidation of 1,3-butadiene by promoting the selective formation of 2-butene-1,4-diol, 4-hydroxybut-2-enal and furan in DMA (total selectivity of 61% and yield of 7%). At the same time, the catalyst induced oxidation of 1,3-butadiene by a non-radical heterolytic mechanism involving the formation of two groups of primary products: (1) crotonaldehyde and methyl vinyl ketone and (2) the products of oxygenation at the 1,4-positions. The compounds of the second group including 1,4-dimethoxy-2-butene and maleic acid dimethyl ester were formed on PdTe centers in MeOH. Increasing the Te concentration in the PdTe/C catalyst forced the conversion of 1,3-butadiene toward 1,4-oxygenation and simultaneously decreased the intensity of secondary oxidation, resulting in the selective formation of derivatives of the 1,4-oxygenation - 1,4-dimethoxy-2-butene and allenic alcohol methyl ether (total selectivity of 84% and yield of 48%).

-

Eisenmann et al.

, p. 2102 (1961)

-

Electrochemical synthesis of versatile ammonium oxides under metal catalyst-, exogenous-oxidant-, and exogenous-electrolyte-free conditions

Yuan, Yong,Li, Liang-Sen,Zhang, Lin,Wang, Feng,Jiang, Lin,Zuo, Lin,Wang, Qi,Hu, Jian-Guo,Lei, Aiwen

supporting information, p. 2768 - 2771 (2021/03/23)

An electrochemical oxidative cross-coupling reaction between 2.5-substituted-pyrazolin-5-ones and ammonium thiocyanate has been developed, which resulted in a series of unprecedented cross-coupling products under metal catalyst-, exogenous-oxidant-, and exogenous-electrolyte-free conditions. It is worth noting that since the resulting cross-coupling products are nearly insoluble in MeCN, the pure product could be afforded without silica gel column purification. In addition, the prepared ammonium oxides are versatile building blocks for synthesizing functionalized pyrazole derivatives.

Revisiting ageless antiques; synthesis, biological evaluation, docking simulation and mechanistic insights of 1,4-Dihydropyridines as anticancer agents

Sidhom, Peter A.,El-Bastawissy, Eman,Salama, Abeer A.,El-Moselhy, Tarek F.

supporting information, (2021/06/21)

The historic DHP nucleus was serendipitously discovered by Arthur Hantzsch about 130 years ago and is still considered a hidden treasure for various pharmacological activities. Twenty-one DHP analogues were synthesized using the expedient one pot Hantzsch synthesis for screening as anticancer agents. Initially, the in vitro anti-proliferative single dose against a panel of 18 cancer cell lines showed that compounds 11b and 8f were the superlative candidates regarding their antitumor effect (GI% mean = 66.40% and 50.42%, correspondingly) compared to cisplatin (GI% mean = 65.58%) and doxorubicin (GI% mean = 74.56%). Remarkably, compound 11b showed a remarkable MDA-MB-468 anticancer activity (GI%=80.81%), higher than cisplatin (64.44%) and doxorubicin (76.72%), as well as strong antitumor activity against lung cancer A549 (GI%= 83.02%), more powerful than both cisplatin and doxorubicin. Compound 11b exhibited an exceptional anticancer activity against lung cancer cell line (A549) as its GI50 in nanomolar was (540 nM) with a 9-fold increase greater than cisplatin (GI50 = 4.93 μM) and with a selectivity index = 131 to cancer cells over normal cells. Further mechanistic investigations proved that DHPs anticipate simultaneously TOPI and RTKs (VEGFR-2, HER-2 and BTK) which can stimulate BAX/BAK and the executioner caspases via rtPCR studies.

Method for synthesizing methyl acetoacetate

-

Paragraph 0014-0031, (2020/08/09)

The invention relates to a novel method for synthesizing methyl acetoacetate, which comprises the following steps: using methyl crotonate as a raw material, oxygen or air as an oxidant and nickel chloride and organic amine as catalysts, carrying out oxidation reaction to directly prepare methyl acetoacetate from methyl crotonate. Compared with the existing process for preparing methyl acetoacetate, the method has the advantages that the use of a strong acid catalyst in a diketene route is avoided, and the methyl acetoacetate synthesis method which is low in cost and environment-friendly and does not need noble metal palladium is provided.

MnO2as a terminal oxidant in Wacker oxidation of homoallyl alcohols and terminal olefins

Fernandes, Rodney A.,Ramakrishna, Gujjula V.,Bethi, Venkati

, p. 6115 - 6125 (2020/10/27)

Efficient and mild reaction conditions for Wacker-type oxidation of terminal olefins of less explored homoallyl alcohols to β-hydroxy-methyl ketones have been developed by using a Pd(ii) catalyst and MnO2 as a co-oxidant. The method involves mild reaction conditions and shows good functional group compatibility along with high regio- and chemoselectivity. While our earlier system of PdCl2/CrO3/HCl produced α,β-unsaturated ketones from homoallyl alcohols, the present method provided orthogonally the β-hydroxy-methyl ketones. No overoxidation or elimination of benzylic and/or β-hydroxy groups was observed. The method could be extended to the oxidation of simple terminal olefins as well, to methyl ketones, displaying its versatility. An application to the regioselective synthesis of gingerol is demonstrated.

High-stability ion liquid for catalyzing esterification of alcohol and acid to generate ester and preparation method

-

Paragraph 0061; 0062; 0063, (2018/11/03)

The invention discloses high-stability ion liquid for catalyzing esterification of alcohol and acid to generate ester and a preparation method, and belongs to the technical field of esterification ofalcohol and acid. A main component of the ion liquid is N-ethylpyrrolidone p-toluenesulfonate and is obtained by synthesizing N-ethyl-2-pyrrolidinone and p-toluenesulfonic acid at the temperature of 80 to 120 DEG C in a one-step method. The high-stability ion liquid has unexpected stability in the reaction for catalyzing the synthesis of alcohol and acid into ester, has the advantages of high activity, high selectivity and low preparation cost, and can realize the esters environment-friendly industrialized production.

Process route upstream and downstream products

Process route

methanol
67-56-1

methanol

1,4-dimethoxy-2-butene
26649-86-5

1,4-dimethoxy-2-butene

dimethyl cis-but-2-ene-1,4-dioate
624-48-6

dimethyl cis-but-2-ene-1,4-dioate

acetoacetic acid methyl ester
105-45-3

acetoacetic acid methyl ester

Conditions
Conditions Yield
With sulfuric acid; oxygen; In water; at 100 ℃; for 3h; under 30402 Torr; Sealed tube; Inert atmosphere;
28.5 %Chromat.
23.9 %Chromat.
22.8 %Chromat.
19.8 %Chromat.
With sulfuric acid; oxygen; In water; at 100 ℃; for 3h; under 30402 Torr; Sealed tube; Inert atmosphere;
32.6 %Chromat.
23.8 %Chromat.
22.3 %Chromat.
12.8 %Chromat.
With sulfuric acid; oxygen; In water; at 120 ℃; for 3h; under 30402 Torr; Sealed tube; Inert atmosphere;
33.7 %Chromat.
29.5 %Chromat.
17.7 %Chromat.
13.3 %Chromat.
methanol
67-56-1

methanol

1,4-dimethoxy-2-butene
26649-86-5

1,4-dimethoxy-2-butene

dimethyl cis-but-2-ene-1,4-dioate
624-48-6

dimethyl cis-but-2-ene-1,4-dioate

acetoacetic acid methyl ester
105-45-3

acetoacetic acid methyl ester

crotonaldehyde
123-73-9,4170-30-3

crotonaldehyde

Conditions
Conditions Yield
With sulfuric acid; oxygen; In water; at 100 ℃; for 2h; under 30402 Torr; Sealed tube; Inert atmosphere;
24.5 %Chromat.
23.6 %Chromat.
22.7 %Chromat.
17.7 %Chromat.
9.1 %Chromat.
With sulfuric acid; oxygen; In water; at 100 ℃; for 3h; under 30402 Torr; Sealed tube; Inert atmosphere;
28 %Chromat.
24.6 %Chromat.
22.1 %Chromat.
17.3 %Chromat.
5.5 %Chromat.
methanol
67-56-1

methanol

2,4-dioxo-6-methyl-3,4-dihydro-2H-1,3-oxazine
2911-21-9

2,4-dioxo-6-methyl-3,4-dihydro-2H-1,3-oxazine

acetoacetic acid methyl ester
105-45-3

acetoacetic acid methyl ester

methyl carbamate
598-55-0

methyl carbamate

Conditions
Conditions Yield
With triethylamine; for 24h; Heating;
15%
70%
α-(2-methyl-1,3-oxathiolan-2-yl)acetanilide
67980-06-7

α-(2-methyl-1,3-oxathiolan-2-yl)acetanilide

acetoacetic acid methyl ester
105-45-3

acetoacetic acid methyl ester

2-(chloromethyl)-5,6-dihydro-N-phenyl-1,4-oxathiin-3-carboxamide
42825-78-5

2-(chloromethyl)-5,6-dihydro-N-phenyl-1,4-oxathiin-3-carboxamide

2,3-dichloro-2-methyl-1,4-oxathiin-3-carboxanilide
110512-33-9

2,3-dichloro-2-methyl-1,4-oxathiin-3-carboxanilide

5,6-dihydro-2-methyl-N-phenyl-1,4-oxathiin-3-carboxamide
5234-68-4

5,6-dihydro-2-methyl-N-phenyl-1,4-oxathiin-3-carboxamide

Conditions
Conditions Yield
With chlorine; In dichloromethane; at 18 ℃; for 0.5h; Yield given;
acetone
67-64-1

acetone

carbonic acid dimethyl ester
616-38-6

carbonic acid dimethyl ester

3,5,5-Trimethylcyclohex-2-en-1-one
78-59-1

3,5,5-Trimethylcyclohex-2-en-1-one

4-methyl-pent-3-en-2-one
141-79-7

4-methyl-pent-3-en-2-one

2-Methoxypropene
116-11-0

2-Methoxypropene

4-Hydroxy-4-methyl-2-pentanone
123-42-2

4-Hydroxy-4-methyl-2-pentanone

acetoacetic acid methyl ester
105-45-3

acetoacetic acid methyl ester

Conditions
Conditions Yield
With CO2 adsorbed on sodium doped MgO; at 240 ℃; for 5h;
<Tripropyl-stannyl>-essigsaeure-methylester
109514-04-7

-essigsaeure-methylester

acetic acid methyl ester
79-20-9

acetic acid methyl ester

acetic acid-(1-methoxy-vinyl ester)
13253-76-4

acetic acid-(1-methoxy-vinyl ester)

tripropyltin chloride
2279-76-7

tripropyltin chloride

acetoacetic acid methyl ester
105-45-3

acetoacetic acid methyl ester

Conditions
Conditions Yield
With acetyl chloride;
88%
18%
46%
9%
methanol
67-56-1

methanol

ethyl (E)-2-acetyl-3-oxo-5-phenylpent-4-enoate
76352-65-3

ethyl (E)-2-acetyl-3-oxo-5-phenylpent-4-enoate

sodium methylate
124-41-4

sodium methylate

acetic acid methyl ester
79-20-9

acetic acid methyl ester

methyl 3-oxo-5-phenyl-4-pentenoate
42996-88-3

methyl 3-oxo-5-phenyl-4-pentenoate

Methyl cinnamate
103-26-4,1754-62-7

Methyl cinnamate

acetoacetic acid methyl ester
105-45-3

acetoacetic acid methyl ester

Conditions
Conditions Yield
3-acetyl-4-hydroxy-6-methyl-2H-pyran-2-one
771-03-9

3-acetyl-4-hydroxy-6-methyl-2H-pyran-2-one

4-hydroxy-6-methyl-2-pyron
675-10-5

4-hydroxy-6-methyl-2-pyron

3,5-dioxohexanoic acid methyl ester
29736-80-9

3,5-dioxohexanoic acid methyl ester

acetoacetic acid methyl ester
105-45-3

acetoacetic acid methyl ester

Conditions
Conditions Yield
With sodium methylate; In methanol; benzene; for 18h; Heating;
18%
16%
7%
crotonic acid methyl ester
623-43-8

crotonic acid methyl ester

acetoacetic acid methyl ester
105-45-3

acetoacetic acid methyl ester

Conditions
Conditions Yield
With oxygen; nickel dichloride; In methanol; water; at 100 ℃; for 12h; under 7500.75 Torr; Reagent/catalyst; Solvent; Temperature; Autoclave;
85.3%
methanol
67-56-1

methanol

1,4-dimethoxy-2-butene
26649-86-5

1,4-dimethoxy-2-butene

Methoxyallene
13169-00-1

Methoxyallene

acetoacetic acid methyl ester
105-45-3

acetoacetic acid methyl ester

Conditions
Conditions Yield
With sulfuric acid; oxygen; In water; at 120 ℃; for 2h; under 30402 Torr; Sealed tube; Inert atmosphere;
49 %Chromat.
35 %Chromat.
11.6 %Chromat.

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