tert-Butyl piperazine-1-carboxylate → tert-Butyl 4-(2-(3,3-bis(4-chlorophenyl)-2-oxopyrrolidin-1-yl)acetyl)piperazine-1-carboxylate

Participants

Reaction Steps

To a solution of the product from Example 25D (0.8 g, 2.2 mmol) in CH2Cl2 (30 mL) was added tert-butyl piperazine-1-carboxylate (0.41 g, 2.2 mmol) under nitrogen. 1-(3-Dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.84 g, 4.4 mmol) and 4-(dimethylamino)pyridine (0.027 g, 0.22 mmol) were added, and the reaction mixture was stirred overnight at room temperature. The reaction mixture was then washed with water and brine, dried over MgSO4, filtered, and concentrated. The crude product was purified by chromatography on silica gel (Analogix Intelliflash 280; (CH3OH/CH2Cl2, 2:98 eluant) to afford the title compound.

Provenance & Evidence