1-tert-butyl 3-methyl 5,5-difluoropiperidine-1,3-dicarboxylate

1-tert-butyl 3-methyl 5,5-dimethyl-2,5-dihydro-1H-pyrrole-1,3-dicarboxylate

1-tert-butyl 3-methyl 5-(2-hydroxypropan-2-yl)piperazine-1,3-dicarboxylate

1-tert-butyl 3-methyl 5-bromo-1,2,3,4-tetrahydropyridine-1,3-dicarboxylate

1-tert-butyl 3-methyl 5-bromo-1H-pyrrole-1,3-dicarboxylate

1-tert-butyl 3-methyl 5-hydroxypiperidine-1,3-dicarboxylate

1-tert-butyl 3-methyl 5-oxopiperidine-1,3-dicarboxylate

1-tert-butyl 3-methyl 6-oxoazepane-1,3-dicarboxylate

1-tert-butyl 3-methyl 6-oxopiperidine-1,3-dicarboxylate

1-tert-butyl 3-methyl azetidine-1,3-dicarboxylate

1-tert-butyl 3-methyl piperazine-1,3-dicarboxylate

1-tert-butyl 3-methyl piperidine-1,3-dicarboxylate

1-tert-butyl 3-methyl propanedioate

1-tert-butyl 3-methyl pyrrolidine-1,3-dicarboxylate

1-tert-butyl 4-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) 4-methylpiperidine-1,4-dicarboxylate

1-tert-butyl 4-(1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) piperidine-1,4-dicarboxylate

1-tert-butyl 4-(4,5,6,7-tetrachloro-1,3-dioxo-2,3-dihydro-1H-isoindol-2-yl) piperidine-1,4-dicarboxylate

1-tert-butyl 4-ethyl (2E)-but-2-enedioate

1-tert-butyl 4-ethyl 3-hydroxy-1H-pyrazole-1,4-dicarboxylate

1-tert-butyl 4-ethyl 3-oxoazepane-1,4-dicarboxylate

1-tert-butyl 4-ethyl 3-oxopiperidine-1,4-dicarboxylate

1-tert-butyl 4-ethyl 4-(2-azidoethyl)piperidine-1,4-dicarboxylate

1-tert-butyl 4-ethyl 4-(methylsulfanyl)piperidine-1,4-dicarboxylate

1-tert-butyl 4-ethyl 4-(prop-2-yn-1-yl)piperidine-1,4-dicarboxylate

1-tert-butyl 4-ethyl 4-acetylpiperidine-1,4-dicarboxylate

1-tert-butyl 4-ethyl 4-cyanopiperidine-1,4-dicarboxylate

1-tert-butyl 4-ethyl 4-formylpiperidine-1,4-dicarboxylate

1-tert-butyl 4-ethyl 4-methanesulfonylpiperidine-1,4-dicarboxylate

1-tert-butyl 4-ethyl 4-methylpiperidine-1,4-dicarboxylate

1-tert-butyl 4-ethyl 5-(trifluoromethanesulfonyloxy)-1,2,3,6-tetrahydropyridine-1,4-dicarboxylate

1-tert-butyl 4-ethyl 5-aminoazepane-1,4-dicarboxylate

1-tert-butyl 4-ethyl 5-cyano-1,2,3,6-tetrahydropyridine-1,4-dicarboxylate

1-tert-butyl 4-ethyl 5-methyl-1,2,3,6-tetrahydropyridine-1,4-dicarboxylate

1-tert-butyl 4-ethyl 5-oxoazepane-1,4-dicarboxylate

1-tert-butyl 4-ethyl 6-(trifluoromethyl)-1H-indole-1,4-dicarboxylate

1-tert-butyl 4-ethyl 6-fluoro-5-oxoazepane-1,4-dicarboxylate

1-tert-butyl 4-ethyl piperidine-1,4-dicarboxylate

1-tert-butyl 4-methyl (2E)-but-2-enedioate

1-tert-butyl 4-methyl (2Z)-but-2-enedioate

1-tert-butyl 4-methyl 1,2,3,4-tetrahydropyridine-1,4-dicarboxylate

1-tert-butyl 4-methyl 1,2,3,6-tetrahydropyridine-1,4-dicarboxylate

1-tert-butyl 4-methyl 4-(2-cyanoethyl)piperidine-1,4-dicarboxylate

1-tert-butyl 4-methyl 4-(4-chlorophenyl)piperidine-1,4-dicarboxylate

1-tert-butyl 4-methyl 4-(aminomethyl)piperidine-1,4-dicarboxylate

1-tert-butyl 4-methyl 4-(azidomethyl)piperidine-1,4-dicarboxylate