Dimethylformamide → HCID 15572341, compound

Participants

Reaction Steps

To 25 ml DMF at 0° was added dropwise with stirring 30 g of phosphorus oxychloride. The mixture was stirred for 15 minutes at room temperature, then a solution of 5.6 g (0.02 mole) of 2,3-bis(4-methoxyphenyl)pyrrole in 40 ml DMF was added dropwise with cooling in an ice bath. The mixture was then heated at 70°-80° for one hour, then cooled. Aqueous sodium hydroxide (50%) was added until the mixture was basic. The reaction mixture was then heated again at 70° for 15 minutes. The cooled reaction mixture was poured into ice water. The precipitated material was collected and purified by chromatography on 600 g Silic AR CC-7 (eluting with toluene containing 1-2% ethyl acetate) to give 3.4 g (55%) of product, m.p. 165°-6° (methylcyclohexane/toluene).

Provenance & Evidence