合成路线1

2,5-Bis(p-bromophenyl)furan (II) was prepared by cyclodehydration of diketone (I) in refluxing acetic anhydride. Displacement of both bromine atoms by copper(I) cyanide in boiling quinoline generated the dicyano derivative (V). Alternatively, furan (V) was prepared by addition of p-cyanobenzaldehyde (III) to divinyl sulfone (IV) in the presence of a thiazolium catalyst. After conversion of the cyano groups of (V) into bis-imidate (VI), reaccion with ethanolic ammonia furnished amidine (VII). The stable symmetrical carbonate (X) was obtained by reaction of p-fluorophenyl chloroformate (VIII) with p-fluorophenol (IX) in the presence of pyridine. Finally, reaction of the bis(amidine) compound (VII) with carbonate (X) yielded the title compound.