39477-94-6Relevant academic research and scientific papers
A case of favoured aromatization of the transient o-benzoquinonemethide the aza-analogue and o-quinodimethane intermediate over the intramolecular cyclo-addition reaction
Trehan, I R,Jain, Vinay K,Seth, Vibha,Singh, Vasundhara
, p. 328 - 333 (2007/10/02)
Suitable precursors silylated 2-(1-hydroxy-5-hexenyl)phenol (III), 3-(pent-5-enyl)-2,1-benzisothiazolin-2,2-dioxide (VII), 3-(3,7-dimethyl-6-octenyl)-2,1-benzisothiazolin-2,2-dioxide (X) and N-methyl>pyruvoyl amide (XIV)
Reactions of 2-phenyl-4H-1,3,2-benzodioxaborin, a stable ortho-quinone methide precursor
Chambers, Jeffrey D.,Crawford, Jason,Williams, Haydn W. R.,Dufresne, Claude,Scheigetz, John,et al.
, p. 1717 - 1732 (2007/10/02)
Thermolysis of 1-phenyl-4H-1,3,2-benzodioxaborins generated the corresponding ortho-quinone methides, which were found to undergo intermolecular cycloaddition reactions with ethyl vinyl ether, dihydropyran, β-methylstyrene, cyclohexene, and 1-ethoxy-1-trimethylsiloxy-1-propenes to give various substituted chromans.Intramolecular trapping of the quinone methides with an olefin led to the syntheses of several analogs of tetrahydrocannabinols. ortho-Quinone methides, generated by treatment of the 2-phenyl-4H-1,3,2-benzodioxaborins with a Lewis acid, react with various nucleophiles to give the corresponding 1,4-addition products.Thus, alkyl and aryl thiols, alcohols, amine, hydride, allyl trimethylsilane, acetophenone, and diethyl malonate as well as some aryl compounds react with the quinone methide to give various 2-substituted phenols.Intramolecular reaction of the quinone methide with an aryl group led to the preparation of some 4-phenylchromans and tetralins.
