Реакция #53611

ord-bef4abc45ff44e46be142e66008f7e76

Растворители

Условия реакции

Подробные условия
See reaction.notes.procedure_details.

Обработка

  1. 1
    ФильтрацияThe catalyst was filtered off
  2. 2
    Концентрированиеthe filtrate was concentrated under reduced pressure
  3. 3
    ДругоеThe residue obtained
  4. 4
    Другоеwas chromatographed on aluminum oxide in chloroform

Методика

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.

Источник

DOI: 10.6084/m9.figshare.5104873.v1Патент: US06858640B2uspto-grants-2005_02