Access to indenofluorene skeletons via Pd-catalyzed sequential reaction involving cyclization of indenone–allenyne intermediates

Abstract

The rapid construction of 7,12-dihydroindeno[1,2-a]fluorene skeletons is achieved via a tandem palladium-catalyzed cross-coupling, Alder–ene isomerization and cyclization sequence from 1-(2-iodophenyl)-3-arylprop-2-yn-1-ones and diynylic ethers.