D. Pena et al., Kinetic control in the palladium-catalyzed synthesis of C-2-symmetric hexabenzotriphenylene. A conformational study, ORG LETT, 2(11), 2000, pp. 1629-1632
[GRAPHICS]
The hitherto unisolated, thermodynamically unstable C-2-symmetric conformer
of hexabenzotriphenylene (1) has been efficiently synthesized by palladium
catalyzed cyclotrimerization of 9,10-didehydrophenanthrene (4). The barrie
rs to conformational interconversion of 1 are examined experimentally and b
y computational studies.