TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (claimed): A ketone compound of formulae (Ar1asterisk-C(=O)-CH3, Ar2asterisk-C(=O)-CH3 or Ar3asterisk-C(=O)-CH3), or subjected to cyclization reaction in presence of acid or base to obtain tri-substituted aromatic compound (I).Ar1asterisk,Ar2asterisk,Ar3asterisk=aryl group or monovalent heterocyclic group, with each having aryl, monovalent alicyclic hydrocarbon or monovalent heterocyclic group in adjacent position of atom comprised in it bonded with acetyl.Preferred Compounds: The tri-substituted aromatic compound is preferably of formula (a-d).X1,X2,X3=-S(=O)n-,-O- or -N(R2)-;n=0-2;R2=H, alkyl, alkoxy, alkylthio, alkylamino, aryl, aryloxy, aryalkyl, aryl alkoxy, arylamino, or monovalent heterocyclic group;andAr4-Ar15=aryl or monovalent heterocyclic group. Preferred Definitions:    Ar1,Ar2,Ar3=monovalent heterocyclic group, thiophene ring, furan ring, pyrrole ring, thiazole ring or oxazole ring;and    X1,X2,X3=-S-, -S(=O)- or -S(=O)2.    SPECIFIC COMPOUNDS - 91 tri-substituted aromatic compounds e.g. 3-phenyl-2-(3-(3-phenyl-2H-l3-thiophen-2-yl)-5-(3-phenylthiophen-2-yl)phenyl)thiophene of formula (1), 3-phenyl-2-(3-(3-phenyl-2H-l3-furan-2-yl)-5-(3-phenylfuran-2-yl)phenyl)furan, 3-phenyl-2-(3-(3-phenyl-1H-pyrrol-2-yl)-5-(3-phenyl-2H-l3-thiophen-2-yl)phenyl)-1H-pyrrole, 2-(3-(3-(2H-l3-thiophen-2-yl)thiophen-2-yl)-5-(3-(thiophen-2-yl)thiophen-2-yl)phenyl)-3-(thiophen-2-yl)thiophene and 2-(2-(3-(3-(furan-2-yl)thiophen-2-yl)-5-(3-(2H-l3-furan-2-yl)thiophen-2-yl)phenyl)thiophen-3-yl)furan, are disclosed.    EXAMPLE - A magnetic stirring element coated with Teflon (RTM: polytetrafluoroethylene) was added to drying machine attached with nitrogen substituted blow-in pipe, heated, mixed with 3-acetyl-2-phenyl thiophene (101.6 mg), cooled and mixed with ethanol (1.25 mL). Then, the reaction container was cooled to 0 degrees C, tetrachlorosilane (0.29 mL) was dripped, reacted for 7 hours, and mixed with water to form water layer. Dichloromethane was extracted from obtained water layer, obtained organic layer was cleaned using saturated salt solution and mixed with magnesium sulfate, and dried to obtain 3-phenyl-2-(3-(3-phenyl-2H-l3-thiophen-2-yl)-5-(3-phenylthiophen-2-yl)phenyl)thiophene (1) in yield of 67%.