Water → HCID 12897054, compound

Participants

Reaction Steps

Under nitrogen, methyl pyrrole-3-carboxylate (5 g., 40 mmoles) was combined with benzoyl chloride (4.8 ml., 40 mmoles) and stannic chloride (9.2 ml. 80 mmoles) in 75 ml. of methylene chloride and stirred for 3 hours at room temperature. Ice and water (50 ml.) was added slowly and stirring continued for an additional 15 minutes. Ether (150 ml.) was then added and, after equilibration, the phases separated. The upper, organic phase was washed sequentially with 50 ml. of water, 50 ml. of 1 N sodium hydroxide and 50 ml. of water, and evaporated to dryness to yield crude product (6.4 g. of solid). Recrystallization from acetonehexane gave purified methyl 5-benzoylpyrrole-3-carboxylate (4.1 g., Rf 0.4 on silica gel thin layer chromatography eluted with ethyl acetate-1/hexane-5/5% acetic acid).

Provenance & Evidence