Chemistry Letters, Vol.35, No.12, 1364-1365, 2006
Trimethylsilyl-substituted dibenzodehydro[12]annulene having high thermal and chemical stability
1,4,9,12-Tetrakis(trimethylsilyl)dibenzodehydro[12]annulene (3) was synthesized by the Eglinton coupling reaction in a good yield. In contrast to parent dibenzodehydro[12]annulene, 3 has extremely high thermal and chemical stability, probably due to the steric protection of the annulene ring by bulky trimethylsilyl substituents on benzene.