Abstract–Effects of substituents at 1, 4-positions of polycyclic aromatic compounds were investigated in the case of reduction of 2, 3-bis (alkoxycarbonyl) arenes with the LiAlH4/AlCl3 system. 2, 3-Bis (alkoxycarbonyl) dihydronaphthacenes and dihydropentacenes 1 were treated with a mixture of LiAlH4 and AlCl3. The products were dependent on the substituents at 1, 4-positions. Similar type of influence of the ...