Reacción #1924610

ord-6d0fec66a0864bd5a318fac60aa1b151

Condiciones de reacción

Temperatura
0°CELSIUS
Condiciones detalladas
See reaction.notes.procedure_details.

Tratamiento posterior

  1. 1
    workup.STIRRINGthe reaction mixture stirred at 0° C. for 4 h
  2. 2
    Lavadowashed with water
  3. 3
    Extracciónthe organic layer extracted into hexane/ethyl acetate (3×30 ml, 1:1)
  4. 4
    LavadoThe combined extracts were washed with brine
  5. 5
    Secadodried (MgSO4)
  6. 6
    Otrothe solvent removed in vacuo
  7. 7
    Otroto yield colorless oil
  8. 8
    OtroThe crude product was purified by column chromatography [silica gel eluted with hexane/ethyl acetate (4:1)]
  9. 9
    Otroto yield a colorless oil

Procedimiento

Monochloroborane-methyl sulfide (2.03 ml, 2.15 g, 19.5 mmol) was added dropwise to a stirred, cooled (0° C.) solution of compound 10 (2.96 g, 13.0 mmol) in THF (20 ml). The reaction mixture was stirred at 0° C. for 24 h, and a solution of hydrogen peroxide (13 ml, 30% in water) added dropwise and the reaction mixture stirred at 0° C. for 4 h, washed with water and the organic layer extracted into hexane/ethyl acetate (3×30 ml, 1:1). The combined extracts were washed with brine, dried (MgSO4) and the solvent removed in vacuo to yield colorless oil. The crude product was purified by column chromatography [silica gel eluted with hexane/ethyl acetate (4:1)] to yield a colorless oil.

Fuente

DOI: 10.6084/m9.figshare.5104873.v1Patente: US06783812B2uspto-grants-2004_08