Triethylamine → rel-1,1-Dimethylethyl (3R,4S)-3-amino-4-(3,4-dichlorophenyl)-1-pyrrolidinecarboxylate

Participants

Reaction Conditions

Reaction Steps

To a solution of the compound (14.4 g) obtained in step 5 in toluene (120 mL) was added DPPA (16.5 g) and triethylamine (8.36 mL) at room temperature, and the mixture was stirred at 100° C. for 2 hr. The reaction solution was cooled, 8N aqueous sodium hydroxide solution (50 mL) was added, and the mixture was stirred at room temperature for 14 hr. The reaction mixture was poured into water and extracted with ethyl acetate. The organic layer was washed with saturated aqueous ammonium chloride solution and saturated brine, dried, and concentrated under reduced pressure to give tert-butyl (3R*,4S*)-3-amino-4-(3,4-dichlorophenyl)pyrrolidine-1-carboxylate (13.3 g, 100%) as an orange oil.

Provenance & Evidence