Methyl iodide → HCID 12917669, compound

Temperature

20 °C

Methyl α-methylthio(2-thienyl)acetate (1.446 g) was dissolved in 8 ml of anhydrous dimethyl sulfoxide, and while cooling, at 20° C., 290 mg (65% content) of sodium hydride was added. When the mixture was stirred for 30 minutes, the reaction solution turned bluish violet. Methyl iodide (0.60 ml) was added to it over the course of 3 minutes, and the mixture was stirred at 20° C. for 1.5 hours, whereupon the bluish violet color gradually vanished. An aqueous solution of ammonium chloride (0.40 g/30 ml) was added, and the mixture was extracted three times with 20 ml of diethyl ether. The organic layer was washed three times with 10 ml of water, and dried over anhydrous sodium sulfate. After concentration under reduced pressure, the residue was chromatographed on a silica gel column using benzene as an eluent to afford 1.410 g of methyl α-methylthio-α-(2-thienyl)propionate in a yield of 91% as a colorless liquid.

1. stirringthe mixture was stirred at 20° C. for 1.5 hours, whereupon the bluish violet color
2. extractionthe mixture was extracted three times with 20 ml of diethyl ether
3. washThe organic layer was washed three times with 10 ml of water
4. dry with materialdried over anhydrous sodium sulfate
5. concentrationAfter concentration under reduced pressure
6. customthe residue was chromatographed on a silica gel column

ORD record

ord-6a3914c7a05741469add2f2e26629b3f

Source dataset

uspto-grants-1981_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04308208