Dimethyl Sulfoxide → HCID 86604735, compound

Temperature

-78 °C

Dimethyl sulfoxide (0.050 mL, 0.70 mmol) in dichloromethane (0.28 mL) was added to oxalyl chloride (0.049 mL, 0.56 mmol) in dichloromethane (2.8 mL) at −78° C., and after 10 minutes of stirring at −78° C., 2-(4-t-butylphenyl)-3-methoxymethyloxy-4-hydroxymethylthiophene (87 mg, 0.28 mmol) in dichloromethane (0.93 mL) was added dropwise. After the addition, the reaction solution was stirred at −78° C. for 20 minutes and at −40 to −50° C. for 1 hour. Triethylamine (0.28 mL, 2.0 mmol) was added dropwise, and the reaction solution was stirred for another 20 minutes under cooling with ice. After addition of saturated aqueous ammonium chloride, the reaction solution was extracted with chloroform, and the organic layer was washed with saturated aqueous sodium chloride, dried over anhydrous sodium sulfate and concentrated to give the desired product as a brown oil (58 mg, yield 68%).

1. additionAfter the addition
2. stirringthe reaction solution was stirred at −78° C. for 20 minutes and at −40 to −50° C. for 1 hour
3. stirringthe reaction solution was stirred for another 20 minutes
4. temperatureunder cooling with ice
5. extractionthe reaction solution was extracted with chloroform
6. washthe organic layer was washed with saturated aqueous sodium chloride
7. dry with materialdried over anhydrous sodium sulfate
8. concentrationconcentrated

ORD record

ord-4ba8c8e85c354d22827cb84aec7a3d0f

Source dataset

uspto-grants-2012_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08318796B2