Dimethylformamide → HCID 72204793, compound

Participants

Reaction Steps

Chlorosulfonyl isocyanate [1189-71-5] (0.453 mmol) was added to a mixture of 5-(5-chloro-2-methyl-phenyl)-6-(4-chloro-phenyl)-1-isopropyl-2-(2-methoxy-phenyl)-5,6-dihydro-1H-pyrrolo[3,4-b]pyrrol-4-one (Example 9) (0.302 mmol) in CH3CN (2 mL) at 0° C. After stirring at rt for 2.5 h, additional chlorosulfonyl isocyanate (0.226 mmol) was added. After another 4 h, the reaction mixture was cooled to 0° C., treated with DMF (0.4 mL), stirred for 15 min and then warmed to 50° C. After 30 min, the reaction mixture was cooled to rt, poured onto ice-H2O and extracted with EtOAc. The organic layer was successively washed with a 1N aqueous solution of NaHCO3 and brine, dried (Na2SO4), filtered and concentrated. The residue was purified by silica gel column chromatography to afford the title compound as an off-white solid. tR: 5.59 min (HPLC 1); ESI-MS: tR=1.39 min, [M+H]+ 530/532/534 (LC-MS 1); TLC: Rf=0.12 (1:3 EtOAc/heptanes); 1H-NMR (d6-DMSO, 600 MHz): (rotamers) 7.79/7.83 (s, 1H), 7.58 (m, 1H), 7.35-7.46 (m, 3H), 7.31 (m, 2H), 7.25 (m, 1H), 7.21 (m, 1H), 7.09-7.17 (m, 2H), 6.61 (s, 1H), 3.97/4.01 (m, 1H), 3.77/3.83 (s, 3H), 1.93 (s, 3H), 1.26/1.35 (m, 3H), 0.42/0.58 (m, 3H).

Provenance & Evidence