Реакция #5445

ord-f54e63fe817945f5aca1b6509ef67a57

Растворители

Условия реакции

Температура
-20°CELSIUS
Подробные условия
See reaction.notes.procedure_details.

Обработка

  1. 1
    Другоеthe reaction was quenched in 5% NaHCO3
  2. 2
    Экстракцияextracted with ethyl acetate
  3. 3
    СушкаThe organic extracts were dried (Na2SO4)
  4. 4
    Другоеevaporated
  5. 5
    workup.DISSOLUTIONthe product was dissolved in ether
  6. 6
    workup.ADDITIONtreated with ethereal HCl
  7. 7
    Другоеevaporated to dryness
  8. 8
    ДругоеThe resulting product was recrystallized from ethyl acetate and ether

Методика

The product from Example 17 (0.95 g) was dissolved in 50 ml methylene chloride and 1.5 ml triethyl amine. The solution was cooled to -20° C. and 0.59 ml p-fluorobenzoyl chloride was added. After 30 min, the reaction was quenched in 5% NaHCO3 and extracted with ethyl acetate. The organic extracts were dried (Na2SO4), evaporated, and the product was dissolved in ether and treated with ethereal HCl and then evaporated to dryness. The resulting product was recrystallized from ethyl acetate and ether to yield 0.772 g of the desired product as a white solid, mp: 197°-8° C. NMR (d6DMSO) δ2.60-3.10 (m, 3H), 3.00-3.50 (m, 4H), 3.59 (m, 2H), 3.78 (s, 3H), 3.82-4.22 (m, 3H), 6.83 (d, 1H), 6.87 (d, 1H), 7.23 (t, 1H), 7.34 (m, 2 H), 8.00 (m, 2H).

Источник

DOI: 10.6084/m9.figshare.5104873.v1Патент: US05244888uspto-grants-1993_09