88214-84-0Relevant academic research and scientific papers
ETUDE DE LA REACTIVITE DE L'ION AZOTURE VIS A VIS DE CATIONS HETEROCYCLIQUES-IV COMPORTEMENT VIS A VIS DE CATIONS CHROMYLIUM DIVERSEMENT SUBSTITUES. REARRANGEMENT THERMIQUE DES AZIDES COVALENTS OBTENUS. VOIE ORIGINALE D'ACCES AUX BENZHETEROAZEPINES
Desbene, P.-L.,Cherton, J.-C.
, p. 3567 - 3577 (2007/10/02)
The study of the azide nucleophile reaction with substituted chromylium salts is presented.When heated, the azido 2H-and azdo 4H-chromenes obtained give benz(f)oxazepins in very good yields.This is an easy preparation of these compounds.
Reactions of Flav-2-enes and Flav-2-en-4-ones (Flavones)
Bird, T. Geoffrey C.,Brown, Ben R.,Stuart, Ian A.,Tyrrell, William R.
, p. 1831 - 1846 (2007/10/02)
Flav-2-enes, flavones, and 3-alkyl ethers of flavonols add alcohols and carboxylic acids in the presence of N-bromosuccinimide to give 2-alkoxy- and 2-acyloxy-3-bromoflavans which provide routes to cis-3-bromoflavans by reduction and to 3,4-diols by elimination and reaction with osmium tetraoxide.The 2-acyloxyflavans react with alcohols yielding 2-alkoxyflavans.Flavonols react with N-bromosuccinimide and alcohols to give bromine-free hemiacetals, the known 2,3-dialkoxy-3-hydroxyflavanones.
