Toluene → Tert-butyl (2S)-1-(carbonochloridoyl)pyrrolidine-2-carboxylate

Participants

Reaction Steps

A solution of 0.961 g (5.62 mmol) of t-butyl prolinate and 0.80 ml (5.76 mmol) of triethylamine in 4.2 ml of dry tetrahydrofuran was added dropwise to a stirring solution of phosgene in toluene (12.5%, 5.9 ml, 6.74 mmol) precooled to 0°. The reaction was allowed to warm to room temperature and stirred for an additional hour. After filtering and concentrating, a yellow oil was obtained which was used directly for the next step, B.

Provenance & Evidence