Triethylamine → HCID 60345718, compound

Participants

Reaction Steps

Methanesulfonyl chloride (4.0 g, 35 mmol) was slowly added to a stirring solution of ethyl pipecolinate, (5.5 g, 35 mmol) and triethylamine (4.9 mL, 35 mmol) in anhydrous methylene chloride (88 mL). The reaction was stirred overnight at ambient temperature and then diluted with ethyl acetate. The organic layer was successively washed with water, twice with 1N aqueous hydrochloric acid, saturated aqueous sodium bicarbonate, and saturated aqueous sodium chloride solutions, dried (anhydrous sodium sulfate), and filtered. The solution was concentrated under reduced pressure to give the desired product as a tan liquid (6.9 g, 84%). 1H NMR (CDCl3, 300 MHz) δ 4.72-4.71 (br d, 1H, J=3.6 Hz), 4.24-4.16 (qd, 2H, J=6.9, 2.6 Hz), 3.74-3.68 (m, 1H), 3.22-3.13 (td, 1H, J=12.3, 3.0 Hz), 2.93 (s, 3H), 2.31-2.25 (m, 1H), 1.83-1.51 (m, 5H), 1.32-1.27 (td, 3H, J=7.0, 0.6 Hz), 3.52-3.42 (m, 1H), 3.01 (s, 3H), 2.32-2.22 (m, 1H), 2.11-1.98 (m, 3H). ESI (m/z): 235.9 (M+H).

Provenance & Evidence