1H-пиррол-3-карбоновая кислота, метиловый эфир (9CI)

Использование

Methyl pyrrole-3-carboxylate is used as an organic chemical synthesis intermediate.

прикладной

A solution of methyl 1H-pyrrole-3-carboxylate (4.48 g, 35.8 mmol) in THF (70 mL) was cooled to -78 °C, N-bromosuccinimide (6.30 g, 35.4 mmol) was added, pyridine (five drops) was added, and the mixture was left standing in a freezer (-20 °C) for 3 days. The reaction mixture was concentrated under reduced pressure. Water was added to the residue, and the mixture was extracted using EtOAc. The extract was washed with brine, dried over Na2SO4, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane-EtOAc = 9/1-1/1) to give Methyl 5-bromo-1H-pyrrole-3-carboxylate (3.59 g, 49percent) as a pale-yellow solid.