Ethyl 4-oxo-4-(4-pyridyl)butyrate

ethyl 8-(4-bromo-2-methylphenyl)-8-oxooctanoate

ethyl 6-(2-iodophenyl)-6-oxohexanoate

Ethyl 4-(3-nitrophenyl)-4-oxobutyrate

ethyl 5-oxo-5-(2-trifluoromethylphenyl)valerate

ethyl 8-oxo-8-(3-trifluoromethylphenyl)octanoate

ethyl 8-(2,4-dichlorophenyl)-8-oxooctanoate

Ethyl 8-(4-isopropylphenyl)-8-oxooctanoate

Ethyl 8-(4-t-butylphenyl)-8-oxooctanoate

ethyl 8-(2-ethoxyphenyl)-8-oxooctanoate

ethyl 5-oxo-5-(4-n-propoxyphenyl)valerate