Triethylamine → HCID 86646817, compound

Participants

Reaction Conditions

Reaction Steps

Under an atmosphere of argon, (2S,4S)-1-tert-butyl 2-methyl 4-hydroxypyrrolidine-1,2-dicarboxylate (10 g, 39.5 mmol, Eq: 1.00) was combined with dichloromethane (75 ml) to give a colorless solution. Then at 0° C., 3-nitrobenzene-1-sulfonyl chloride (9.58 g, 41.9 mmol, Eq: 1.06) was added. Also at 0° C., triethylamine (12.0 g, 16.5 ml, 119 mmol, Eq: 3.00) was added dropwise to the reaction mixture. The reaction was stirred for 1.5 h at 0° C. and then for 2 days at room temperature. The reaction mixture was diluted in dichloromethane (200 ml) and then extracted with 2×50 ml HC10.5N, 70 ml satd. NaHCO3 solution and 50 ml satd. NaCl solution. The organic layer was stirred over Na2SO4, filtered and concentrated under reduced pressure. The title compound was obtained as a brown gum (17.25 g, quant., MS (m/e)=431.3 [M+H+]. The product was used in the next step without further purification.

Provenance & Evidence