ethyl 6-(2,3-difluorophenyl)-6-oxohexanoate

Ethyl 5-oxooctanoate

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

Ethyl 4-propionylbenzoate

ethyl 4-(3,5-dimethylphenyl)-2-methyl-4-oxobutyrate

ethyl 7-(3,4-dichlorophenyl)-7-oxoheptanoate

ethyl 7-(4-bromo-2-methylphenyl)-7-oxoheptanoate

ethyl 5-(3-bromo-5-methylphenyl)-5-oxovalerate

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

Ethyl 5-(4-iodophenyl)-5-oxovalerate

Ethyl 6-(3-nitrophenyl)-6-oxohexanoate