tert-butyl (2S)-2-formylpyrrolidine-1-carboxylate → Tert-butyl (2S)-2-acetylpyrrolidine-1-carboxylate

Participants

Reaction Steps

25 ml (75 mmol) 3 M methylmagnesium chloride (diethyl ether) and 8.25 g (41.4 mmol) BOC-L-prolinal were allowed to react at −80° C. for 30 min according to procedure F. Yield of the crude product 9.19 g. The product was purified with a silica column using 33% ethyl acetate in petroleum ether as eluent. Yield 7.54 g (35.0 mmol 85%). The product was oxidized to the corresponding ketone according to procedure G. Yield of crude product 6.91 g. The product was purified with a silica column using 20–25% ethyl acetate in petroleum ether as eluent. Yield 5.61 g (26.3 mmol, 75%).

Provenance & Evidence