26579-97-5

Basic information

• Product Name: 2-Methoxy-2-butenedioic acid dimethyl ester
• Synonyms: 2-Methoxy-2-butenedioic acid dimethyl ester
• CAS NO: 26579-97-5
• Molecular Formula: C₇H₁₀O₅
• Molecular Weight: 174.15
• Mol File: 26579-97-5.mol
• Article Data: 5

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 2-Methoxy-2-butenedioic acid dimethyl ester(CAS DataBase Reference)
• NIST Chemistry Reference: 2-Methoxy-2-butenedioic acid dimethyl ester(26579-97-5)
• EPA Substance Registry System: 2-Methoxy-2-butenedioic acid dimethyl ester(26579-97-5)

Safety Data

• Hazardous Substances Data: 26579-97-5(Hazardous Substances Data)

Upstream product

• 762-42-5 dimethyl acetylenedicarboxylate 
• 105-55-5 N,N'-diethylthiourea 
• 67-56-1 methanol 
• 90-02-8 salicylaldehyde 
• 7664-93-9 sulfuric acid 
• 142-45-0 Acetylenedicarboxylic acid 
• 685-63-2 hexafluoro-1,3-butadiene 

Relevant articles and documents

A convenient synthesis of alkyl-2-(2-imino-4-oxothiazolidin-5-ylidene)acetate derivatives involving an electrogenerated base of acetonitrile

We report a simple method for the synthesis of alkyl-2-(2-imino-4-oxothiazolidin-5-ylidene) acetate derivatives 3 in good yields under mild conditions. The electrogenerated cyanomethyl base (EGB), obtained from electroreduction of acetonitrile-0.1 M TBABF4, assists the reaction between thiourea derivatives 1 and dialkyl acetylene dicarboxylate 2. The expected products, 3/4, and the structure obtained from X-ray diffraction confirm that the main products are the five-membered heterocycles 3. Furthermore, a mechanism, to explain the reaction pathways, is proposed based on the thermodynamic and kinetic data obtained from quantum calculations.

Aqueous-phase deactivation and intramolecular [2 + 2 + 2] cycloaddition of oxanorbornadiene esters

Both inter- and intramolecular degradation pathways were identified for the aqueous phase deactivation of oxanorbornadiene (OND) electrophiles, and propargylic OND esters were found to undergo facile intramolecular [2 + 2 + 2] homo-Diels-Alder cycloaddition in polar media.

The crystal structure of [Mo(NCS)(CO)2(η3-C3H5) (NCMe)2].MeCN and the reactions of {Mo(CO)2 (η3-C3H5)+} containing species with symmetric alkynes

In the solid-state about molybdenum, with carbonyls and nitriles in the equatorial plane and an N-bonded thiocyanate group trans to the allyl ligand. In refluxing methanol or acetonitrile both 1, and the analogous chloro-complex [MoCl(CO)2(η3-C3 H5)(NCMe)2](2) catalytically convert PhC≡CPh to a mixture of hexaphenylbenzene and E,E-1,2,3,4-tetraphenylbutadiene. By contrast MeO2CC≡CCO2Me is not oligomerised. In methanol, complex 2 dimerises 1,4-diphenylbutadiyne to Z,E-1,4,5,8-tetraphenyl-1,7-octa-3,5-diene-1,7-diyne, whereas in the presence of base both the complex and the diyne, react preferentially with the solvent to generate the [Mo2(CO)4 (η3-C3H5)2 (OMe)3]- anion and Z-1,4-diphenyl-3- methoxy-but-3-ene-1-yne, respectively.