In accordance with the purpose(s) of the present disclosure, as embodied and broadly described herein is versatile polyene cyclization strategy that exploits conjugated -ionyl derivatives. Photomediated disruption of the extended -system within these chromophores unveils a contra-thermodynamic polyene that engages in a Heck-type cyclization to afford [4.4.1]-propellanes. The connectivity of overbred polycycles generated from this process is controlled by the position of the requisite C-Halide bond. Thus, compared to conventional biomimetic polyene cyclization, this approach allows for complete control of regiochemistry and facilitates incorporation of both electron-rich and electron-deficient (hetero)aryl groups. This strategy was successfully applied to the total synthesis of abietanes such as, for example, taxodione and salviasperanol, two isomeric abietane-type diterpenes that previously could not be prepared along the same synthetic pathway.

Process for the industrial synthesis of the compound of formula (I): ##STR00001##

Process for the industrial synthesis of the compound of formula (I): ##STR00001##

The present disclosure discloses tribenzotriquinacene with an axial aryl group and a method for preparing the same. The triphenyltripentacene has a structure shown in formula (1):

##STR00001##

R.sub.1 and R.sub.2 are independently hydrogen, a C1-C12 alkyl group, a C1-C12 alkoxy group, a C1-C12 fluoroalkyl group, a C1-C12 fluorine-containing alkoxy group, a C1-C12 ester group, a halogen group, a nitro group, an amine group, a cyano group, or a hydroxy group.

The present disclosure discloses tribenzotriquinacene with an axial aryl group and a method for preparing the same. The triphenyltripentacene has a structure shown in formula (1):

##STR00001##

R.sub.1 and R.sub.2 are independently hydrogen, a C1-C12 alkyl group, a C1-C12 alkoxy group, a C1-C12 fluoroalkyl group, a C1-C12 fluorine-containing alkoxy group, a C1-C12 ester group, a halogen group, a nitro group, an amine group, a cyano group, or a hydroxy group.