Dimethyl Sulfoxide → Benzo[d][1,2,3]thiadiazole-7-carbaldehyde

温度

-78 °C

Under nitrogen atmosphere, to a solution of oxalyl chloride (7.03 mL, 83.0 mmol) in methylene chloride (50 mL) was added dimethyl sulfoxide (8.84 mL, 125 mmol) and the mixture was stirred at −78° C. for 30 min. To the reaction mixture was added 1,2,3-benzothiadiazol-7-ylmethanol (6.90 g, 41.5 mmol) at −78° C. and the mixture was stirred for 2 hr. To the reaction mixture was added triethylamine (35.0 mL, 249 mmol) at −78° C. and the mixture was stirred for 30 min. The reaction mixture was warmed to room temperature, and stirred at room temperature for 4 hr. Saturated aqueous ammonium chloride solution was added to the reaction mixture, and the mixture was extracted with methylene chloride. The extract was washed with saturated brine, and dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by recrystallization (methylene chloride/hexane) to give the title compound (6.20 g, yield 91%).

1. stirringthe mixture was stirred for 2 hr
2. stirringthe mixture was stirred for 30 min
3. temperatureThe reaction mixture was warmed to room temperature
4. stirringstirred at room temperature for 4 hr
5. extractionthe mixture was extracted with methylene chloride
6. washThe extract was washed with saturated brine
7. dry with materialdried over anhydrous sodium sulfate
8. customthe solvent was evaporated under reduced pressure
9. customThe residue was purified by recrystallization (methylene chloride/hexane)

ORDレコード

ord-3ec17b8986d24227b531d5950aaf9f98

出典データセット

uspto-grants-2012_02

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08110585B2