Sodium Methoxide → HCID 67239280, compound

Participants

Reaction Steps

Sodium methoxide (190 mg, 3.50 mmol) was added to a solution of diethyl 1-(3-chloropropyl)-5-methyl-3-phenyl-pyrrole-2,4-dicarboxylate (1.1 g, 2.91 mmol) in methanol (10 mL) and stirred at reflux for 28 h. The reaction mixture was cooled to room temperature and concentrated to dryness. The residue was dissolved in water and the aqueous layer was extracted with dichloromethane. The organic layer was washed with water, brine, dried over anhydrous sodium sulphate and concentrated in vacuo to afford dimethyl 1-(3-methoxypropyl)-5-methyl-3-phenyl-pyrrole-2,4-dicarboxylate (330 mg, 33%) as a yellow oil. The aqueous layer was acidified with 2N hydrochloric acid to pH 2 and extracted with ethyl acetate. The combined organic layer was washed with water, brine, dried over anhydrous sodium sulphate and concentrated to afford 4-methoxycarbonyl-1-(3-methoxypropyl)-5-methyl-3-phenyl-pyrrole-2-carboxylic acid (170 mg, 18%) as a pink oil.

Provenance & Evidence