116544-74-2Relevant academic research and scientific papers
Cyclodeshydratation d'aryloxy-2 diaryl-1,2 ethanones en diaryl-2,3 benzofurannes. Influence de la substitution sur la competition entre deux chemins reactionnels
Montfort, Bernard,Laude, Bernard,Vebrel, Joel,Cerutti, Ernest
, p. 848 - 854 (2007/10/02)
Many of the methods for synthesizing derivatives of 2,3-diaryl benzofurans imply cyclodehydration of 1,2-diaryl 2-aryloxyethanones, leading often to a mixture of two isomers which differ by the presence of the aryl substituent at positions C-2 or C-3 of benzofuran.This isomerisation is explained by a competition between two possible mechanisms.Either a direct electrophilic substitution or the intermediate formation of an α-acylcarbenium ion.This study deals with the competition as determined by the substitution of aryl groups in the initial substrate.Each 2,3-diarylbenzofuran was synthesized previously using an unambiguous method.
Synthese de l'hydroxymethyl-5 furanne carboxaldehyde-2 et de ses derives par traitement acide de sucres sur resines echangeuses d'ions
Hajj, Toni El,Masroua, Antoine,Martin, Jean-Claude,Descotes, Gerard
, p. 855 - 860 (2007/10/02)
Conversion of carbohydrates (D-fructose, sucrose) or natural polysaccharides (inuline) to 5-hydroxymethyl-2-furancarboxaldehyde in a two phase system (water-organic solvent) has been investigated.Continuous or semi-continuous processes for extracting HMF and purification techniques were explored.Reaction of 5-hydroxy-methyl-2-furancarboxaldehyde with reducting or oxidating agents allows access to a variety of 2,5-bifunctional derivatives.
