Sodium Hydroxide → 1-Benzyl-3-(4-chlorophenyl)-5-(trifluoromethyl)-1H-pyrrole-2-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

To a solution of ethyl 1-benzyl-3-(4-chlorophenyl)-5-(trifluoromethyl)-1H-pyrrole-2-carboxylate (2.59 g, 6.35 mmol) in dry THF (15 mL) was added a solution of NaOH (3.9 g, 98 mmol) in H2O (15 mL). The reaction mixture was stirred overnight at 80° C. An additional portion of NaOH (4.25 g, 106 mmol) was added and the reaction mixture was stirred at 100° C. during 7 h. The organic solvent was evaporated and the residue was acidified with aqueous 5 M HCl (55 mL). The product was extracted with EtOAc (3×20 mL). The combined organic layer was washed with brine (3×20 mL) and dried (Na2SO4). The remaining oil was triturated with heptane (20 mL). The off-white solids were filtered off to give 1.29 g (51%) ACI-06.

Provenance & Evidence