Hydrochloric Acid → tert-butyl (6S,7R)-7-(3,4-dichlorophenyl)-6-(2,2,2-trifluoro-1-hydroxyethyl)-1,4-oxazepane-4-carboxylate

To a solution (2.6 mL) of tert-butyl (6R,7R)-7-(3,4-dichlorophenyl)-6-formyl-1,4-oxazepane-4-carboxylate (100 mg) in THF were added a solution (1.0 M, 0.534 mL) of trimethyl(trifluoromethyl)silane (190 mg) and tetrabutylammonium fluoride in THF under ice-cooling, and the mixture was stirred at room temperature overnight. To the reaction mixture was added 1 M hydrochloric acid (0.5 ml), and the mixture was further stirred for 3 hr. Distilled water was added, and the mixture was extracted with ethyl acetate. The extract was washed with distilled water and brine, and dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel chromatography (hexane/ethyl acetate) to give the title compound (91.7 mg).

1. temperaturecooling
2. stirringthe mixture was further stirred for 3 hr
3. extractionthe mixture was extracted with ethyl acetate
4. washThe extract was washed with distilled water and brine
5. dry with materialdried over anhydrous magnesium sulfate
6. customthe solvent was evaporated under reduced pressure
7. customThe residue was purified by silica gel chromatography (hexane/ethyl acetate)

ORDレコード

ord-db768316e77b413c9b72a5b2f44a30c6

出典データセット

uspto-grants-2014_05

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08722662B2