12.Linear C2-Symmetric Polycyclic Benzodithiophene: Efficient, Highly Diversified Approaches and the Optical Properties C. H. Wang, R. Hu, S. Liang, J. H. Chen. Z. Yang*, J. Pei* Tetrahedron Lett., 2005, 46, 8153. Two facile approaches to two new series of the seven-rings fused benzodithiophene-based polycyclic aromatics are developed in good yields.
