Morpholine → HCID 59516804, compound

Temperature

-40 °C

To a solution of 2.62 ml of morpholine in 50 ml of THF there was added 11.2 ml of n-butyllithium (2.71 M, hexane solution) at −78° C. under a nitrogen atmosphere, and the mixture was stirred at −40° C. for 30 minutes. To this solution there was added dropwise a solution of 6.5 g of 2-bromo-5-ethoxy-4-methoxybenzaldehyde [CAS No. 56517-30-7] in 40 ml of THF at −78° C., and the mixture was stirred at −78° C. for 1 hour. After further adding 14.8 ml of n-butyllithium (2.71 M, hexane solution) at −78° C., the mixture was stirred at −78° C. for 40 minutes, and then a solution of 15.8 g of N-fluorobenzenesulfonamide in 40 ml of THF was added dropwise at −78° C. and the mixture was stirred overnight while raising the temperature to room temperature. Saturated aqueous ammonium chloride was added to the reaction mixture and extraction was performed with ethyl acetate. The organic layer was washed with water and saturated brine and then dried over anhydrous sodium sulfate. The desiccating agent was filtered off and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate-heptane) to give the title compound (3.33 g) as a light yellow solid.

1. stirringthe mixture was stirred at −78° C. for 40 minutes
2. stirringthe mixture was stirred overnight
3. temperaturewhile raising the temperature to room temperature
4. washThe organic layer was washed with water and saturated brine
5. dry with materialdried over anhydrous sodium sulfate
6. filtrationThe desiccating agent was filtered off
7. concentrationthe filtrate was concentrated under reduced pressure
8. customThe residue was purified by silica gel column chromatography (ethyl acetate-heptane)

ORD record

ord-f9a34ae0af274caa9e688e75f44299f1

Source dataset

uspto-grants-2010_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07816522B2