Triethylamine → HCID 59577231, compound

To an ice-cold stirred solution of tert-butyl 3-hydroxyazetidine-1-carboxylate (2.20 g, 12.7 mmol) and triethylamine (1.54 g, 15.2 mmol) in THF (60.0 mL) was added methanesulfonyl chloride (1.60 g, 14.0 mmol) and the resulting reaction mixture was warmed to room temperature. After 2 h the reaction mixture was filtered and filtrate concentrated under reduced pressure. The residue was dissolved in toluene (30.0 mL), added to a stirred solution of 80% 2-tert-butylthiophenol (2.12 g, 10.2 mmol), tetrabutylammonium bromide (0.41 g, 1.27 mmol) and sodium hydroxide (4.80 ml of 8.0 M solution in water, 38.4 mmol) in toluene (30.0 mL) and the resulting reaction mixture was heated at 100° C. for 3 h. Then, the reaction mixture was cooled to room temperature, diluted with ethyl acetate and separated. The organic layer was washed with water, saturated sodium chloride, dried (Na2SO4), filtered and concentrated under reduced pressure. The residue was purified by flash column chromatography (silica gel, 95:5 to 80:20 heptane/ethyl acetate) provided tert-butyl 3-(2-tert-butylphenylthio)azetidine-1-carboxylate (1.80 g, 55%) as a pale yellow oil.

1. customthe resulting reaction mixture
2. filtrationAfter 2 h the reaction mixture was filtered
3. concentrationfiltrate concentrated under reduced pressure
4. dissolutionThe residue was dissolved in toluene (30.0 mL)
5. customthe resulting reaction mixture
6. temperaturewas heated at 100° C. for 3 h
7. temperatureThen, the reaction mixture was cooled to room temperature
8. customseparated
9. washThe organic layer was washed with water, saturated sodium chloride
10. dry with materialdried (Na2SO4)
11. filtrationfiltered
12. concentrationconcentrated under reduced pressure
13. customThe residue was purified by flash column chromatography (silica gel, 95:5 to 80:20 heptane/ethyl acetate)

ORD record

ord-8b1593ee1ed44111bbbfc313609da1fe

Source dataset

uspto-grants-2013_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08586571B2