Water → HCID 20708440, compound

Temperature

0 °C

Methyl (3-(2-hydroxyethyl)-2-methylbenzofuran-7-yloxy)acetate (203 mg) and triethylamine (0.16 ml) were dissolved in dichloromethane (4 ml) and the obtained solution was cooled to 0° C. To this solution, methanesulfonyl chloride (0.071 ml) was added and the solution was stirred at 0° C. for 20 minutes. The reaction solution was poured into water layer (50 ml) and the resultant was extracted twice with ethyl acetate (20 ml). The organic layers were combined and washed with saturated brine, followed by drying over sodium sulfate. The sodium sulfate was removed by filtration and the solvent was removed under reduced pressure. The obtained residue was dissolved in DMF (2.5 ml) and the obtained solution was added to a separately prepared solution of bis(4-tetrahydropyranyloxyphenyl)methanethiol (369 mg) and potassium t-butoxide (104 mg) in DMF (2 ml), followed by stirring the resulting solution at room temperature for 30 minutes. To this reaction solution, 1N hydrochloric acid (1.5 ml) was added and the solution was stirred for 1 hour. The reaction solution was poured into water layer (50 ml) and the resultant was extracted twice with ethyl acetate (20 ml). The organic layers were combined and washed with saturated brine, followed by drying 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: hexane/ethyl acetate=1/1)using silica gel to obtain the desired compound (54 mg, yield: 15%).

1. extractionthe resultant was extracted twice with ethyl acetate (20 ml)
2. washwashed with saturated brine
3. dry with materialby drying over sodium sulfate
4. customThe sodium sulfate was removed by filtration
5. customthe solvent was removed under reduced pressure
6. dissolutionThe obtained residue was dissolved in DMF (2.5 ml)
7. additionthe obtained solution was added to a separately prepared solution of bis(4-tetrahydropyranyloxyphenyl)methanethiol (369 mg) and potassium t-butoxide (104 mg) in DMF (2 ml)
8. stirringby stirring the resulting solution at room temperature for 30 minutes
9. additionTo this reaction solution, 1N hydrochloric acid (1.5 ml) was added
10. stirringthe solution was stirred for 1 hour
11. additionThe reaction solution was poured into water layer (50 ml)
12. extractionthe resultant was extracted twice with ethyl acetate (20 ml)
13. washwashed with saturated brine
14. dry with materialby drying over sodium sulfate
15. customAfter removing the sodium sulfate
16. filtrationby filtration
17. customthe solvent was removed under reduced pressure
18. customthe residue was purified by column chromatography (solvent

ORD record

ord-79ace85fc57c42a98fe4c1bfd392b68c

Source dataset

uspto-grants-2001_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06323235B1