Dimethyl Sulfoxide → tert-Butyl 4-formylpiperidine-1-carboxylate

Participants

Reaction Steps

Oxalyl chloride (18.5 mL, 2M in DCM, 37.0 mmol) in DCM (230 mL) was cooled with a dry ice/acetone bath. DMSO (5.15 mL, 72.6 mmol) was added dropwise via addition funnel and the reaction was stirred for 10 min. N-Boc-4-piperidinemethanol in DCM (20 mL) was added dropwise via addition funnel and the reaction was stirred for 15 min. TEA (17.0 mL, 122 mmol) was then added dropwise via addition funnel and the reaction was warmed to rt. The reaction was diluted with diethyl ether, washed with H2O and brine, dried (MgSO4) and concentrated to provide the title compound (5.36 g, 25.1 mmol, 100%, approximately 96% pure, used without further purification). 1H NMR (400 MHz, DMSO-d6) δ ppm 1.29-1.34 (m, 3H), 1.37 (s, 9H), 1.75-1.83 (m, 2H), 2.87 (s, 2H), 3.78 (d, J=13.2 Hz, 2H), 9.56 (s, 1H).

Provenance & Evidence