Pure Appl. Chem., 2006, Vol. 78, No. 4, pp. 699-706
http://dx.doi.org/10.1351/pac200678040699
From superphanes to beltenes
Abstract:
This short review describes paths to superphanes with metal-stabilized cyclobutadiene and cyclopentadienone rings in a one-pot and stepwise fashion. The stepwise synthesis also led to a new class of belt-like systems with large rings composed of CpCo-stabilized cyclobutadiene rings connected with propane chains. Finally, our research yielded the first beltenes composed of alternating four- and eight-membered conjugated rings.