| abstract |
A process for preparing substituted pentacene compounds comprises the step of cyclizing substituted bis(benzyl)phthalic acids using an acid composition comprising trifluoromethanesulfonic acid, the substituted bis(benzyl)phthalic acids being represented by the following general formulas: n n nwherein each R (that is, each of the groups R 1 through R 8 ) is independently an electron-donating group, a halogen atom, a hydrogen atom, or a combination thereof. |