N-bromobutanimide → 2-Bromo-5-(3-chloro-2-fluoro-phenyl)-6-(4-chloro-2-methyl-phenyl)-1-isopropyl-5,6-dihydro-1H-pyrrolo[3,4-b]pyrrol-4-one

Participants

Reaction Steps

NBS (1.926 mmol) was added to a mixture of 5-(3-chloro-2-fluoro-phenyl)-6-(4-chloro-2-methyl-phenyl)-1-isopropyl-5,6-dihydro-1H-pyrrolo[3,4-b]pyrrol-4-one (Step A1) (1.965 mmol) in CCl4 (65 mL). After 1.5 h, the reaction mixture was diluted with EtOAc and successively washed with a saturated aqueous solution of NaHCO3, water and brine, dried (Na2SO4), filtered and concentrated. The residue was purified using a RediSep® silica gel column to afford the title compound as a white solid. tR: 5.69 min (HPLC 1); ESI-MS: tR=1.39 min, [M+H]+ 495/497/499 (LC-MS 1); TLC: Rf=0.12 (CH2Cl2).

Provenance & Evidence