Synthesis and optical behaviour of monodispersed oligo(fluorenylidene)s
作者:Roberto Grisorio、Piero Mastrorilli、Giuseppe Ciccarella、Gian Paolo Suranna、Cosimo Francesco Nobile
DOI:10.1016/j.tetlet.2008.01.126
日期:2008.3
The synthesis of the first series of monodispersedoligo(fluorenylidene)s is reported. The synthetic sequence envisages as key steps the obtainment (a) of a bis-pinacolboronate fluorenylidene dimer by a Ni(cod)2 promoted homocoupling of the suitable 7-bromo-fluorenylidene boronic ester and (b) of the bis-pinacolboronate fluorenylidene trimer and tetramer by a Ni(cod)2 promoted coupling of a 7-bromo-fluorenylidene