Cyclisatioh de diarylalcanes en milieu superacide : synthese de cetones tricycliques a methyle angulaire et mecanisme de leur isomerisation
作者:C. Berrier、J.C. Jacquesy、J.P. Gessom、A. Renoux
DOI:10.1016/s0040-4020(01)88438-6
日期:1984.1
Cyclisation of readily available diary1-1,2 ethanes 1→4 proceeds in SbF5,-HF at 0°C to yield tricyclic phenanthrenones 5, 6, 7 and 11 bearing an angular methyl group. This process implies the electrophilic attack of the more basic aromatic ring, reacting through its diprotonated form (on the oxygen and the meta carbon atom) on the second aromatic ring. Isomerization of these primary products may be
Crucial Dependence of Chemiluminescence Efficiency on the<i>Syn</i>/<i>Anti</i>Conformation for Intramolecular Charge-Transfer-Induced Decomposition of Bicyclic Dioxetanes Bearing an Oxidoaryl Group
作者:Masakatsu Matsumoto、Haruna Suzuki、Nobuko Watanabe、Hisako K. Ijuin、Jiro Tanaka、Chizuko Tanaka
DOI:10.1021/jo2006945
日期:2011.6.17
Thermally stable rotamers of bicyclic dioxetanes bearing 6-hydroxynaphthalen-1-yl (anti-5a and syn-5a), 3-hydroxynaphthalen-1-yl (anti-5b and syn-5b), and 5-hydroxy-2-methylphenyl groups (anti-5c and syn-5c) were synthesized. These dioxetanes underwent TBAF (tetrabutylammonium fluoride)-induced decomposition accompanied by the emission of light in DMSO and in acetonitrile at 25 °C. For all three pairs
[EN] SUBSTITUTED TRIAZINE PHENYLUREA DERIVATIVE AND USE THEREOF AGAINST TUMORS<br/>[FR] DÉRIVÉ SUBSTITUÉ DE TRIAZINE PHÉNYLURÉE ET SON UTILISATION CONTRE DES TUMEURS