Dihydrobiphenylenes through Ruthenium-Catalyzed [2+2+2] Cycloadditions of<i>ortho</i>-Alkenylarylacetylenes with Alkynes
作者:Silvia García-Rubín、Carlos González-Rodríguez、Cristina García-Yebra、Jesús A. Varela、Miguel A. Esteruelas、Carlos Saá
DOI:10.1002/anie.201309496
日期:2014.2.10
A new synthetic route to dihydrobiphenylenes has been developed. The process involves a mild RuII‐catalyzed [2+2+2] dimerization of ortho‐alkenylarylacetylenes or its more versatile variant, the Ru‐catalyzed [2+2+2] cycloaddition of ortho‐ethynylstyrenes with alkynes. Mechanistic aspects of this [2+2+2] cycloaddition are discussed.