Reacción #53611

ord-bef4abc45ff44e46be142e66008f7e76

Disolventes

Condiciones de reacción

Condiciones detalladas
See reaction.notes.procedure_details.

Tratamiento posterior

  1. 1
    FiltraciónThe catalyst was filtered off
  2. 2
    Concentraciónthe filtrate was concentrated under reduced pressure
  3. 3
    OtroThe residue obtained
  4. 4
    Otrowas chromatographed on aluminum oxide in chloroform

Procedimiento

Compound (29) 609 mg was dissolved in tetrahydrofuran 20 ml. 20% Palladium(II)hydroxide 200 mg was added. A mixture was stirred in a hydrogen atomosphere for 22 h. The catalyst was filtered off and the filtrate was concentrated under reduced pressure. The residue obtained was chromatographed on aluminum oxide in chloroform to give the titled compound (31) as pale brown crystals, 337 mg. Yield 86%. Furthermore, this was recrystallized from methanol-isopropanol to give the titled compound (31) as pale brown crystals, m.p. 202-203° C.

Fuente

DOI: 10.6084/m9.figshare.5104873.v1Patente: US06858640B2uspto-grants-2005_02