View all references and, in particular, substituted cyclopentenes, such as 4??arylcyclopentenes 3, are important building blocks used in organic synthesis. These compounds have seldom been prepared and usualy as by??products in the course of the Heck reaction of halobenzenes with cyclopentene.2 View all references Compound 3 can be subjected to a wide variety of additional chemical transformations to give potential intermediates as cyclopentadienes and ...