Methyl iodide → HCID 12819459, compound

Temperature

-30 °C

A solution of methyl 2-(thiophen-2-yl)acetate (4.90 g, 31.4 mmol) in THF (25 ml) was added dropwise to a suspension of sodium hydride (1.20 g, 31.4 mmol, 60%) in THF (25 ml) at −50° C. under an atmosphere of nitrogen. After the reaction mixture was stirred for 1 h, methyl iodide was added (1.76 ml, 28.2 mmol) as solution in THF (25 ml) slowly at −50° C. over a period of 15 min. The reaction mixture was warmed up to −30° C. and continued to stir for another 2 h. It was quenched with aqueous ammonium chloride, extracted with DCM (2×30 ml) and washed with brine (30 ml). The organic layer was dried over anhydrous sodium sulfate, filtered and concentrated under vacuo. The crude was purified by column chromatography over silica gel (100-200 mesh) using ethyl acetate (5%) in petroleum ether as eluent to get 2.2 g (41.7%) of methyl 2-(thiophen-2-yl)propanoate as a colorless liquid.

1. stirringto stir for another 2 h
2. customIt was quenched with aqueous ammonium chloride
3. extractionextracted with DCM (2×30 ml)
4. washwashed with brine (30 ml)
5. dry with materialThe organic layer was dried over anhydrous sodium sulfate
6. filtrationfiltered
7. concentrationconcentrated under vacuo
8. customThe crude was purified by column chromatography over silica gel (100-200 mesh)

ORD record

ord-933774f353de44928a9769981f56ae56

Source dataset

uspto-grants-2013_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08518948B2