Synthesis of Aryl-Substituted 1,4-Benzoquinonevia Water-Promoted and In(OTf)3-Catalyzedin situ Conjugate Addition-Dehydrogenation of Aromatic Compounds to 1,4-Benzoquinone in Water
作者:Hai-Bo Zhang、Li Liu、Yong-Jun Chen、Dong Wang、Chao-Jun Li
DOI:10.1002/adsc.200505248
日期:2006.1
Mono- and diaryl-substituted 1,4-quinones were synthesized by the In(OTf)3-catalyzed conjugate addition of aromatic C-nucleophiles to 1,4-quinone derivatives followed by in situ dehydrogenation in water. Water was found to be beneficial to the reaction. The regioselectivity of the addition reaction in water was also examined.
Title compounds possessing a variety of substituents are systematically prepared by means of Meerwein arylation of benzene-1,4-dione. Synthetic aspects and their MNDO calculation-based interpretation are described.