Methyl iodide → HCID 14567223, compound

In a nitrogen flow 0.56 g (2.93 mmol) of methyl 1-hydroxy-2-indolecarboxylate was added to a suspension of 0.12 g (2.93 mmol) of 60% sodium hydride in 20 ml of tetrahydrofuran at room temperature. After it was confirmed that the reaction mixture became transparent, 0.83 g (5.86 mmol) of methyl iodide was added to the reaction mixture. The mixture was then refluxed for 2 hours. After cooling to room temperature, the reaction mixture was poured onto ice water followed by extraction three times with ethyl acetate. The combined extracts were washed with saturated sodium chloride solution. After drying over anhydrous magnesium sulfate, the solvent was distilled off under reduced pressure. The resulting residue was purified by silica gel column chromatography to give 0.46 g (76.5%) of methyl 1-methoxy-2-indolecarboxylate.

1. temperatureThe mixture was then refluxed for 2 hours
2. additionthe reaction mixture was poured onto ice water
3. extractionfollowed by extraction three times with ethyl acetate
4. washThe combined extracts were washed with saturated sodium chloride solution
5. dry with materialAfter drying over anhydrous magnesium sulfate
6. distillationthe solvent was distilled off under reduced pressure
7. customThe resulting residue was purified by silica gel column chromatography

ORD record

ord-fa179234783446fdbfcd96b23569daf7

Source dataset

uspto-grants-2001_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06248772B1