Lithium Hydroxide → HCID 86609851, compound

Participants

Reaction Steps

A mixture of 3-chloro-3-oxopropanoate (0.235 mL, 2.2 mmol), tert-butyl 3-aminopyrrolidine-1-carboxylate (410 mg, 2.2 mmol), DCM (4.4 mL) and DIPEA (0.766 mL, 4.4 mmol) was stirred for 2 h at room temperature. The reaction mixture was concentrated under reduced pressure and the residue was re-dissolved in THF (2.2 mL), treated with LiOH×H2O (0.185 g, 4.4 mmol) in water (2.2 mL) for 2 h at room temperature and concentrated under reduced pressure to remove the THF. The remaining aqueous solution was extracted with EtOAc, acidified with 2N HCl (until pH˜5), extracted again with EtOAc. The combined organic extracts were dried over anhydrous Na2SO4, filtered and concentrated under reduced pressure to afford the title compound 35 (286 mg, 48% yield) as a light brown foam which was used in the next step without further purification. MS (m/z): 273.1 (M+H).

Provenance & Evidence