Reaction of 1-phenyldiazoethane with tetrachloro-p- and o-benzoquinones
作者:Takumi Oshima、Toshikazu Nagai
DOI:10.1016/s0040-4039(00)95026-3
日期:1985.1
Reaction of 1-phenyldiazoethane(1) with tetrachloro-p-benzoquinone(2) gave 1-alkoxy-4-ethenyloxy-tetrachlorobenzene(4). With tetrachloro-o-benzoquinone(5), 1 provided 1-alkoxy-2-ethenyloxy-tetrachlorobenzene(7) and tetrachlorobenzo-1,3-dioxolane(8). The mechanism and the effect of added methanol were discussed.
Two C–O Bond Formations on a Carbenic Carbon: Palladium-Catalyzed Coupling of <i>N</i>-Tosylhydrazones and Benzo-1,2-quinones To Construct Benzodioxoles
A novel and efficient method for the formation of two C–O bonds on a carbenic carbon is reported. This palladium-catalyzed coupling of N-tosylhydrazones and benzo-1,2-quinones were involved the process of carbonylylidesgeneration, aromatization, and intramolecular nucleophilic addition, delivering various useful benzodioxoles in high yields.