Phosgene → HCID 66971415, compound

Participants

Reaction Steps

The product of Step A, (2S,4S)-1-Boc-2-{[(2-hydroxyethyl)amino]carbonyl}-4-[dimethylpropanoyl(4,4-dimethylcyclohexyl)amino]pyrrolidine (410 mg, 0.58 mmol) together with DMAP (70.7 mg, 0.58 mmol) and DIPEA (0.39 ml, 2.32 mmol) were dissolved in toluene (3 ml), and phosgene (20% in toluene, 0.31 ml, 0.87 mmol) was added dropwise. After the reaction solution was stirred at 30˜40° C. for 48 h, the solution was concentrated in vacuo. The residue was diluted with EtOAc, and washed with a saturated NaHCO3 aqueous solution, water and 1N HCl. The organic solution was dried over MgSO4, concentrated in vacuo, and the residue was purified by column chromatography (eluent: EtOAc) to give the title compound (160 mg, 62%).

Provenance & Evidence