85960-76-5Relevant academic research and scientific papers
The Behaviour of 2H-1-Benzopyrans Toward Trialkylaluminium Reagents
Alberola, Angel,Ortega, Alfonso Gonzalez,Pedrosa, Rafael,Bragado, Jose L. Perez,Amo, Justo F. Rodriguez
, p. 1209 - 1212 (2007/10/02)
2H-1-Benzopyrans react with trialkylaluminium compounds by alkyl- and hydrogen-transfer to C-2 and C-4 to give the o-allylphenols (2), (3), and the (E)-o-propenylphenols (4) and (5).The site of attack and the ratio of alkyl- to hydrogen-transfer depend on the alkylaluminium used and on the size of the substituent at C-2 of the pyran.A mechanism involving reaction of the alkylaluminium with the quinone methanide (6), which is in equilibrium with the pyran (1), is in accord with all experimental results.
REACTION DE WITTIG EN MILIEU HETEROGENE SOLIDE-LIQUIDE : TRANSFORMATION DIRECTE DES ALDEHYDES PHENOLIQUES NATURELS EN ALCENES
Bigot, Yves Le,Delmas, Michel,Gaset, Antoine
, p. 193 - 196 (2007/10/02)
New alkenylphenols can be obtained directly, without protecting the phenol group from the condensation reaction between phenolic aldehydes and various phosphonium salts in the presence of potassium carbonate in protic and aprotic media, using a solid-liquid phase transfer.
