Diisopropylethylamine → (S)-tert-butyl (1-(3-nitropyridin-4-yl)piperidin-3-yl)carbamate

Participants

Reaction Steps

To a 20 mL microwave vial containing 4-chloro-3-nitropyridine (Aldrich, 1.350 g, 8.515 mmol) and tert-butyl (3S)-piperidin-3-ylcarbamate (Combi-Blocks, 1.922 g, 9.597 mmol), 1-butanol (13.0 mL) was added, followed by DIPEA (2.213 g, 17.12 mmol). The reaction mixture was irradiated with microwaves at 130° C. for 1 h. The reaction mixture was then allowed to cool and concentrated under reduced pressure. The resulting residue was purified by flash chromatography on silica gel (0-100% EtOAc in hexanes) to give the sub-title compound as a yellow solid (2.69 g, 98%). LCMS calc. for C15H23N4O4 (M+H)+: m/z=323.2. found 323.2.

Provenance & Evidence