تفاعل #1511196

ord-fad2e87c3b2b44bd9d0fd6ff24986e5a

المذيبات

ظروف التفاعل

الظروف التفصيلية
See reaction.notes.procedure_details.

المعالجة

  1. 1
    تركيزThe reaction mixture was concentrated under reduced pressure, saturated aqueous sodium hydrogencarbonate
  2. 2
    workup.ADDITIONwas added to the residue
  3. 3
    استخلاصthe mixture was extracted with dichloromethane
  4. 4
    غسيلthe organic layer was washed with saturated sodium chloride solution
  5. 5
    تجفيفdried with anhydrous sodium sulfate
  6. 6
    ترشيحAfter filtration
  7. 7
    تركيزthe filtrate was concentrated under reduced pressure
  8. 8
    أخرىthe residue was purified by silica gel chromatography (Isco Combiflash, 12 g, methanol:ethyl acetate=0:100 to 40:60, gradient)

الإجراء التجريبي

A solution of the compound (380 mg, 0.73 mmol) obtained in Example 19-1) and 4 M hydrochloric acid (1,4-dioxane solution, 2 mL) in methanol (2 mL) was stirred at room temperature for 14 h. The reaction mixture was concentrated under reduced pressure, saturated aqueous sodium hydrogencarbonate was added to the residue, the mixture was extracted with dichloromethane, and the organic layer was washed with saturated sodium chloride solution and dried with anhydrous sodium sulfate. After filtration, the filtrate was concentrated under reduced pressure, and the residue was purified by silica gel chromatography (Isco Combiflash, 12 g, methanol:ethyl acetate=0:100 to 40:60, gradient) to obtain the title compound (230 mg, 78%) as a colorless solid.

المصدر

DOI: 10.6084/m9.figshare.5104873.v1براءة الاختراع: US08927536B2uspto-grants-2015_01