Sodium Hydroxide → 5-bromo-2-[(3-chloro-4-fluoro-phenylamino)-(4-chloro-phenyl)-methyl]-1-isopropyl-1H-pyrrole-3-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

2N aqueous NaOH (32 mmol) was added to a solution of 5-bromo-2-[(3-chloro-4-fluoro-phenylamino)-(4-chloro-phenyl)-methyl]-1-isopropyl-1H-pyrrole-3-carboxylic acid methyl ester (Step D2) (1.517 mmol) in 1:1 THF/MeOH (32 mL) and the mixture was stirred at 80° C. for 10 h. After evaporation of MeOH, the pH was adjusted to 5 with addition of 10% w/w aqueous citric acid (35 mL) and extracted with EtOAc. The organic phase was dried (Na2SO4), filtered and concentrated to afford a light brown solid. tR: 8.05 min (HPLC 2); ESI-MS: tR=1.38 min, [M−H] 497/499/501 (LC-MS 2).

Provenance & Evidence