Bernard Jacquet

Oxydation des tetralones par le superoxyde de potassium solubilise par ether-couronne

Resume α and β-tetralones are oxidised in tetrahydrofuran solution by means of potasssium superoxide with crown-ether to give 2-hydroxy-1,4 naphtoquinone with fair to good yields.

Differenciation entre les dihydroxy-2,5 et -3,5 naphtoquinones-1,4 par resonance magnetique nucleaire du 13C et 1H, et heteronucleaire a deux dimensions.

Resume 1 H and 13 C NMR, as well as two-dimensional correlation 13 C/ 1 H experiments were used to characterise unequivocally two isomeric naphthoquinones, 2,5-dihydroxy and 3,5-dihydroxy-1,4-naphthoquinones.

Exemple de réaction à l'interface solide-liquide: oxydation de naphtalènediols par le superoxyde de potassium

Abstract The oxidation of 1,2 and 1,3-dihydroxynaphtalenes with potassium superoxide in aprotic media is a heterogeneous to reaction at the solid-liquid interface, leading to the 2-hydroxy-1,4-naphtoquinone with good yields even if the addition of crown-ether is omitted.