ethyl 4-bromo-2,2-dimethylbutanoate

ethyl 2-chloro-2-methylpropanoate

ethyl 2,2-dimethyl-5,6,6-trichlorohex-3-yn-5-enoate

ethyl 3-hydroxy-2,2,3-trimethylbutanoate

2,3-dimethyl-1-(pyridin-4-yl)butan-2-ol