Diethyl Ether → HCID 18351826, compound

Temperature

0 °C

3-azidomethyl-7-methoxybenzofuran (325 mg) was dissolved in diethyl ether (10 ml) and the solution was cooled to 0° C. To this solution, lithium aluminum hydride (91 mg) was added and the resulting solution was stirred at 0° C. for 1 hour and then at room temperature for 1.5 hours. To the reaction solution, saturated aqueous sodium hydrogen carbonate was added and the solution was dried over magnesium sulfate, followed by filtration. After concentrating the filtrate, the residue was dissolved in dimethylformamide (7 ml). To this solution, potassium t-butoxide (415 mg) and n-propanethiol (0.34 ml) were added and the solution was stirred at 100° C. for 1.5 hours. After the reaction, the reaction solution was cooled to 0° C. and pyridine (1.2 ml) and acetyl chloride (1.05 ml) were added, followed by stirring the resulting solution for 40 minutes. The reaction solution was poured into water layer (30 ml) and extracted twice with ethyl acetate (20 ml). The organic layers were combined and washed with 1N hydrochloric acid (20 ml) and with saturated brine, followed by drying the resultant over sodium sulfate. After removing the sodium sulfate by filtration, the solvent was removed under reduced pressure and the residue was purified by column chromatography (solvent: chloroform/methanol=95/5) using silica gel to obtain the desired compound (260 mg, yield: 66%).

1. waitat room temperature for 1.5 hours
2. dry with materialthe solution was dried over magnesium sulfate
3. filtrationfollowed by filtration
4. concentrationAfter concentrating the filtrate
5. dissolutionthe residue was dissolved in dimethylformamide (7 ml)
6. additionTo this solution, potassium t-butoxide (415 mg) and n-propanethiol (0.34 ml) were added
7. stirringthe solution was stirred at 100° C. for 1.5 hours
8. customAfter the reaction
9. temperaturethe reaction solution was cooled to 0° C.
10. stirringby stirring the resulting solution for 40 minutes
11. extractionextracted twice with ethyl acetate (20 ml)
12. washwashed with 1N hydrochloric acid (20 ml) and with saturated brine
13. dry with materialby drying the resultant over sodium sulfate
14. customAfter removing the sodium sulfate
15. filtrationby filtration
16. customthe solvent was removed under reduced pressure
17. customthe residue was purified by column chromatography (solvent: chloroform/methanol=95/5)

ORD record

ord-f3cf53c5260b4a2db0a1974945050dda

Source dataset

uspto-grants-2001_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06323235B1