title: Efficient synthesis of symmetrically and unsymmetrically substituted hexaphenylbenzene analogues by suzuki-miyaura coupling reactions.
abstract: A series of symmetrically and unsymmetrically substituted hexaphenylbenzene (HPB) analogues were efficiently synthesized by using a sterically hindered Suzuki-Miyaura cross-coupling reaction of arylboronic acids with 1,4-diiodo-2,3,5,6-tetraarylbenzenes under our optimized reaction conditions. The 1,4-diiodo-2,3,5,6-tetraarylbenzenes can be readily prepared by using a one-pot Hart reaction. Oxidative cyclodehydrogenation of the dibromo derivative with FeCl(3) gave the corresponding hexabenzocoronene (HBC) derivative in good yield.
authors.affiliation: Max-Planck-Institute for Polymer Research, Ackermannweg 10D-55128 Mainz, Germany.
authors.forename: Xiaoyin
authors.initials: X
authors.lastname: Yang
authors.forename: Xi
authors.initials: X
authors.lastname: Dou
authors.forename: Klaus
authors.initials: K
authors.lastname: Müllen