Regioselective oxidation of 3-monosubstituted juglone derivatives
作者:Elias A Couladouros、Alexandros T Strongilos
DOI:10.1016/s0040-4039(99)02112-7
日期:2000.1
Derivatives of 3-substituted juglones with either electron-withdrawing or -donating substituents are regioselectively oxidized to o- or p-naphthoquinones using salcomine/air or [bis(trifluoroacetoxy)iodo]benzene, respectively. The structure of the oxidation products was confirmed by chemical transformations. A correlation between chemical shift of the single quinoid proton and the quinone structure was established
Directable regiochemistry in naphthazarins via the use of masked derivatives
作者:J.L. Bloomer、K.W. Stagliano
DOI:10.1016/0040-4039(93)89004-a
日期:1993.1
The carboethoxynaphthol 3d was converted via salcomine oxidation to the masked carboethoxynaphthazarin 4b which could undergo nucleophilic addition or, if unmasked, transfer quinone reactivity to the alternative ring in form 5. The latter should undergo regiospecific Diels-Alder reactions.