Construction of tetracyclic ring systems by Co2(CO)8-catalyzed tandem [2 + 2 + 1]/[2 + 2 + 2] cycloaddition reaction of diynes: a simple one-pot reaction†
Abstract
The Co2(CO)8-catalyzed tandem [2 + 2 + 1]/[2 + 2 + 2] cycloaddition reaction of terminal diynes under CO produces an unnatural novel tetracyclic compound.