34669-95-9Relevant academic research and scientific papers
Electron-Deficient Glutaconate Systems: the Formation of Lactones, Benzenes and Naphthalenes
Baker, S. Richard,Cromble, Leslie,Loader, Charles
, p. 2407 - 2420 (2007/10/03)
Base catalysed glutaconate-pyrone systems involved in the formation of xanthyrones and glaucyrones also produce benzenoid and naphthalenoid compounds dependent on the system and conditions involved. "Dimer" type condensations usually require milder base than the "monomeric" type and three base-catalysed cases are encountered involving: (a) two aldol and one Claisen condensations; (b) three aldols; and (c) Michael addition and lactonisation.An example of Lewis acid catalysed formation of a coumarin from dimethyl 2,4-dimethoxycarbonyl glutaconic ester is also given.Arationale is suggested for the formation of trimethyl methyltrimesate in a "melt" reaction, and of the products from the treatment of certain xanthyrones with sodium methoxide.
CYCLOAROMATIZATION REACTIONS OF METHYL 4-CARBOMETHOXY-5-METHOXY-PENTA-2,4-DIENOATE
Nantz, M. H.,Fuchs, P. L.
, p. 761 - 772 (2007/10/02)
Synthesis of the title compound, 1, is described.Reaction of 1 with β-dicarbonyl compounds or various activated acetone derivatives provides substituted 1,3-benzenedicarboxylates.
