Diisopropylethylamine → 1-tert-Butyl 4-methyl 4-aminopiperidine-1,4-dicarboxylate

Participants

Reaction Steps

4-Amino-1-tert-butoxycarbonylpiperidine-4-carboxylate (5 g) in acetonitrile (22 ml) and methanol (2 ml) was treated with diisopropylethylamine (3.65 ml) and trimethylsilyldiazomethane (2M in hexane, 13.9 ml). After overnight stirring and evaporation of solvent, the crude product was chromatographed on silica gel (0–50% ethyl acetate/petrol) to give a yellow oil (4 g, 76%).

Provenance & Evidence