20851-13-2

Basic information

• Product Name: 3,4-Thiophenedicarboxylic acid, 2,5-diphenyl-, dimethyl ester
• CAS NO: 20851-13-2
• Molecular Formula: C20H16O4S
• Molecular Weight: 352.411
• Mol File: 20851-13-2.mol
• Article Data: 6

Chemical Properties

• CAS DataBase Reference: 3,4-Thiophenedicarboxylic acid, 2,5-diphenyl-, dimethyl ester(CAS DataBase Reference)
• NIST Chemistry Reference: 3,4-Thiophenedicarboxylic acid, 2,5-diphenyl-, dimethyl ester(20851-13-2)
• EPA Substance Registry System: 3,4-Thiophenedicarboxylic acid, 2,5-diphenyl-, dimethyl ester(20851-13-2)

Safety Data

• Hazardous Substances Data: 20851-13-2(Hazardous Substances Data)

Upstream product

• 75142-20-0 1,2,5,6-Tetraphenyl-3,8,9,10-tetrathia-tricyclo[4.2.1.1^2,5]decane-4,7-dione 
• 762-42-5 dimethyl acetylenedicarboxylate 
• 20850-89-9 2,5-diphenyl-1,3-dithiolylium-4-olate 
• 18100-80-6 2,3,5-triphenyl-4-thiazolone 
• 59484-42-3 4-hydroxy-2,5-diphenyl-1,3-thiazole 
• 4891-38-7 phenylpropynoic acid methyl ester 
• 72234-59-4 methyl 5-phenyl-1,2,3-thiadiazole-4-carboxylate 

Downstream Products

• 22045-71-2 2,5-Diphenyl-3,4-thiophendicarbonsaeure 

Relevant articles and documents

THE CONDUCTIVE SULFUR/CARBON MIXTURE CATHODE. AN EFFICIENT SYNTHESIS OF THIOPHENES AND RELATED COMPOUNDS FROM ACETYLENES

The electroreduction of Michael acceptors such as acetylenic derivatives at a compact sulfur-carbon electrode in aprotic media affords thioorganic compounds, mainly thiophenes, in fairly high yields.Their formation is discussed as a function of the electronic effect of the substituents on the acetylenic triple bond.

REACTIONS DE CYCLOADDITION DIPOLAIRE-1,3 DES THIAZOLONES ET DES SELENAZOLONES MESOIONIQUES AVEC L'ACETYLENE DICARBOXYLATE DE METHYLE-II

Mesoionic thyazolones and selenazolones react with dimethyl acetylene dicarboxylate to give thiophenes or pyridones.We show that the reactivity of the mesoionic thiazolones towards dimethyl acetylene dicarboxylate may be explanied by second order perturbation theory, limited to frontier orbitals.The influence of the temperature and of the nature of the substituants on the evolution of the primary cycloadduct can be explained by competition between a retro Diels-Alder rection giving a thiophene and a desulfurisation or a deselenurisation giving a pyridone.

QUATERNARISATION DE L'ATOME D'AZOTE DE SYSTEMES TAUTOMERES DE LA SERIE DES OXO-4 THIAZOLES. CYCLOADDITIONS DIPOLAIRES 1,3 DES THIAZOLES MESOIONIQUES FORMES IN SITU

4-Hydroxythiazoles and N-acylimino 4-thiazolidinones show similar tautomeric behaviour to azlactones.However, the mechanism of their reaction with dimethylacetylenedicarboxylate or with ethyl vinyl ether differs fundamentally.In the thiazole series, the first step is the quaternization of the nitrogen atom.The mesoionic thiazole intermediate is then trapped by a second molecule of the dipolarophile.