2,5-Dimethyl-1-phenylpyrrole-3-carboxaldehyde → Pyrvinium Pamaote Impurity 3

Participants

Reaction Conditions

Reaction Steps

To a solution of compound 3 (316 mg, 1.7 mmol) and compound 5 (507 mg, 2.55 mmol) in DMF (25 mL) was added ZnCl2 (232 mg, 1.7 mmol). The reaction mixture was stirred at 160° C. overnight. Then the reaction mixture was diluted with aqueous NaOH (10%) and extracted with EtOAc. The organic layer was dried over anhydrous Na2SO4 and the solvent was removed under reduced pressure, the residue was purified by column chromatography (hexane:EtOAc=20:1) to give 13 mg of the target product (2.1%). MS[M++1]=368, LC-MS: tR=1.909 min

Provenance & Evidence