150690-14-5Relevant academic research and scientific papers
Preparation of symmetrical and unsymmetrical monomers towards bridge trifluoromethylated poly(p-phenylenevinylene)
Roche, Alex J.,Loyle, Anne D.,Pinto, Jean-Pierre
, p. 1473 - 1480 (2007/10/03)
The preparation and identification of a series of trifluoromethylated and bis(trifluoromethylated) precursors and monomers for bridge substituted trifluoromethylated poly(p-phenylenevinylene) (PPV) is reported. These monomers were prepared in several steps from terephthaldicarboxaldehyde and they contain symmetrical and unsymmetrical combinations of leaving groups and/or polarizers, including chlorides, sulfoxides, sulphones, tosylates and S-methyl (and also O-ethyl) xanthates. The electron withdrawing effect of the trifluoromethyl group dominated the regioselectivity of substitution, thus allowing the convenient and selective formation of unsymmetrically substituted products in high yield.
