Benzyl chloroformate → HCID 85850740, compound

Participants

Reaction Steps

A solution of 18 g (61 mmol) of (R/S)-1-benzyl-pyrrolidin-3-yl carboxylic acid, benzyl ester (from Step A) in 100 mL of CH2Cl2 at 0° C. was treated with 21.3 mL (231 mmol) of benzyl chloroformate while maintaining the internal temperature at less than 6° C. The reaction was allowed to warm to rt overnight. After 24 hours at rt, an additional 10 mL (10.8 mmol) of benzyl chloroformate was added. After 24 hours of stirring at rt, the reaction was concentrated. The residue was purified on a 40L Biotage column using 19:1 v/v hexane/acetone as the eluant to afford 8.42 g (39%) of the title compound as a colorless oil: RF: 0.14 (9:1 v/v hexane/acetone); 1H-NMR (500 MHz) δ 2.19-2.22 (m, 2H), 3.15 (m, 1H), 3.45-3.75 (m, 4H), 5.13-5.20 (m, 4H), 7.33-7.41 (m, 10H).

Provenance & Evidence