Hydrochloric Acid → HCID 70869363, compound

Temperature

-78 °C

Diisopropylamine (478 μL, 3.40 mmol) was dissolved in tetrahydrofuran (2.0 mL), the mixture was stirred at −78° C. for 15 minutes, and 2.6N n-butyllithium/hexane solution (1.31 mL, 3.40 mmol) was added dropwise. After dropwise addition, the mixture was stirred at 0° C. for 30 minutes, and isobutyric acid (158 μL, 1.70 mmol) was added dropwise at −78° C. After the completion of the dropwise addition, the mixture was stirred at 0° C. for 20 minutes, 5-chloromethylthiophene-2-carboxylic acid tert-butyl ester (360 mg, 1.55 mmol) dissolved in tetrahydrofuran (1.5 mL) was added at 0° C., and the mixture was stirred at room temperature overnight. Ethyl acetate and 1N aqueous hydrochloric acid solution were added to the reaction mixture, the mixture was partitioned, and the organic layer was separated. The aqueous layer was extracted three times with ethyl acetate, and the organic layers was combined and washed with saturated brine. The organic layer was dried over magnesium sulfate, and the solvent was evaporated to give the title compound as a crude product.

1. additionAfter dropwise addition
2. stirringthe mixture was stirred at 0° C. for 30 minutes
3. additionAfter the completion of the dropwise addition
4. stirringthe mixture was stirred at 0° C. for 20 minutes
5. additionwas added at 0° C.
6. stirringthe mixture was stirred at room temperature overnight
7. customthe mixture was partitioned
8. customthe organic layer was separated
9. extractionThe aqueous layer was extracted three times with ethyl acetate
10. washwashed with saturated brine
11. dry with materialThe organic layer was dried over magnesium sulfate
12. customthe solvent was evaporated

ORD record

ord-72c7f6a71e874833ade0c5f870c3a741

Source dataset

uspto-grants-2014_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08877805B2