作者:Zhao Chen、Xie Han、Jin-Hua Liang、Jun Yin、Guang-Ao Yu、Sheng-Hua Liu
DOI:10.1016/j.cclet.2014.09.013
日期:2014.12
Some novel cycloaddition reactions based on benzyne and olefins have been developed. These reactions were performed in the absence of a transition metal catalyst, and they displayed good yields. These cycloaddition reactions of benzyne with olefins provide effective routes for synthesizing benzocyclobutenes, biaryl compounds and 9,10-dihydrophenanthrene derivatives.
A palladium-catalyzed cyclobutanation of aryl sulfonates with strainedalkenes has been developed. The methodology is featured to achieve the cleavage of both C–O and C–H bonds of phenol derivatives in one pot. Under the reaction conditions, in addition to reactive triflates, the relatively inactive tosylates and mesylates can also be transformed into the corresponding benzocyclobutanes in high yields
An Improved Synthesis of 1,4-cis,exo-Hexa- or Tetrahydromethano- or -ethanobiphenylene Derivatives Catalyzed by Palladium Complexes
作者:Marta Catellani、Lorenzo Ferioli
DOI:10.1055/s-1996-4286
日期:1996.6
A direct way to prepare cis,exo-hexahydromethano- or -ethanobiphenylene derivatives involving intramolecular aromatic C-H activation is reported. It consists of the palladium-catalyzed reaction of a rigid olefin with an aryl halide in dimethyl formamide in the presence of potassium carbonate.