NOVELTY - Preparation of N-(2-benzoylphenylethyl)benzamide involves carrying out ring opening of 1-phenyl-3,4-dihydroisoquinoline with benzoyl chloride using potassium fluoride on alumina as a heterogeneous basic medium at room temperature in an aromatic hydrocarbon solvent.    USE - Preparation of N-(2-benzoylphenylethyl)benzamide used as inflammation imaging agent, photosensitizer, and ultraviolet light stabilizer for sunscreen products, and for controlling phytopathogenic fungi and fungi diseases, and exhibiting antibacterial and antiviral effects.    ADVANTAGE - The method enables efficient preparation of N-(2-benzoylphenylethyl)benzamide with high yield, by economical and environmentally-friendly process.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) preparation of N-(4-chloro-2-(3-cyanobenzoyl)phenethyl)benzamide, which involves carrying out ring opening of 3-(7-chloro-3,4-dihydroisoquinolin-1-yl)benzonitrile with benzoyl chloride using potassium fluoride on alumina as heterogeneous basic medium at room temperature in an aromatic hydrocarbon solvent;    (2) preparation of N-(4-chloro-2-(3-(trifluoromethyl)benzoyl)phenethyl)-4-(trifluoromethyl)benzamide, which involves carrying out ring opening of 7-chloro-1-(3-(trifluoromethyl)phenyl)-3,4-dihydroisoquinoline with 4-(trifluoromethyl)benzoyl chloride using potassium fluoride on alumina as heterogeneous basic medium at room temperature in an aromatic hydrocarbon solvent;    (3) preparation of 2-chloro-N-(4-fluoro-2-(4-(trifluoromethyl)benzoyl)phenethyl)benzamide, which involves carrying out ring opening of 7-fluoro-1-(4-(trifluoromethyl)phenyl)-3,4-dihydroisoquinoline with 2-chlorobenzoyl chloride using potassium fluoride on alumina as heterogeneous basic medium at room temperature in an aromatic hydrocarbon solvent;    (4) preparation of N-(4-chloro-2-(3-(trifluoromethyl)benzoyl)phenethyl)benzamide, which involves carrying out ring opening of 7-chIoro-1-(3-(trifluoromethyl)phenyl)-3,4-dihydroisoquinoline with 4-(trifluoromethyl)benzoyl chloride using potassium fluoride on alumina as heterogeneous basic medium at room temperature in an aromatic hydrocarbon solvent;    (5) preparation of N-(4-chloro-2-(4-(trifluoromethyl)benzoyl)phenethyl)benzamide, which involves carrying out ring opening of 7-chloro-1-(4-(trifluoromethyl)phenyl)-3,4-dihydroisoquinoline with benzoyl chloride using potassium fluoride on alumina as heterogeneous basic medium at room temperature in an aromatic hydrocarbon solvent; and    (6) preparation of 2-chloro-N-(2-(4-cyanobenzoyl)-4-fluorophenethyl)benzamide, which involves carrying out ring opening of 4-(7-fluoro-3,4-dihydroisoquinolin-1-yl)benzonitrile with 3-chlorobenzoyl chloride using potassium fluoride on alumina as heterogeneous basic medium at room temperature in an aromatic hydrocarbon solvent.