Ethyl 4-oxo-4-(2-pyridyl)butyrate

Ethyl 4-(4-bromo-2-methylphenyl)-4-oxobutyrate

ethyl 8-(2-iodophenyl)-8-oxooctanoate

Ethyl 5-(3-nitrophenyl)-5-oxovalerate

Ethyl 5-(4-nitrophenyl)-5-oxovalerate

ethyl 4-(2,3-dichlorophenyl)-4-oxobutyrate

ethyl 7-(2,4-dichlorophenyl)-7-oxoheptanoate

ethyl 4-(4-t-butylphenyl)-4-oxobutyrate

ethyl 7-oxo-7-(4-n-pentylphenyl)heptanoate

ethyl 5-(4-ethoxyphenyl)-5-oxovalerate

Ethyl 5-oxo-5-(4-isopropoxyphenyl)valerate