Methanol → 2-(3',4'-Dihydroxybenzyl)-5-[2-(4-chlorophenyl)ethyl]pyrrolidine hydrobromide

HRID 1249526Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1249526
C[O:2][C:3]1[CH:4]=[C:5]([CH:21]=[CH:22][C:23]=1[O:24]C)[CH2:6][CH:7]1[CH2:11][CH2:10][CH:9]([CH2:12][CH2:13][C:14]2[CH:19]=[CH:18][C:17]([Cl:20])=[CH:16][CH:15]=2)[NH:8]1.B(Br)(Br)[Br:27].CO>C(Cl)Cl>[BrH:27].[OH:2][C:3]1[CH:4]=[C:5]([CH:21]=[CH:22][C:23]=1[OH:24])[CH2:6][CH:7]1[CH2:11][CH2:10][CH:9]([CH2:12][CH2:13][C:14]2[CH:19]=[CH:18][C:17]([Cl:20])=[CH:16][CH:15]=2)[NH:8]1

Komponenten

5

Edukt 3

HCID 887MethanolHCID 25134Boron tribromideHCID 201642172-(3',4'-Dimethoxybenzyl)-5-[2-(4-chlorophenyl)ethyl]pyrrolidine

Produkt 1

HCID 201642162-(3',4'-Dihydroxybenzyl)-5-[2-(4-chlorophenyl)ethyl]pyrrolidine hydrobromide

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

To a cold (-70° C.) solution of 24.2 g (0.67 mole) of 2-(3',4'-dimethoxybenzyl)-5-[2-(4-chlorophenyl)ethyl]pyrrolidine in 600 cc of methylene chloride was added dropwise 46.5 g (0.186 mole) of boron tribromide. After the addition the reaction mixture was gradually warmed to room temperature over a period of 2 hours. The mixture was cooled again to -70° C. and 300 ml of methanol was carefully added. Solvent was removed in vacuo. An additional 100 ml of methanol was added and removed in vacuo. The gummy residue was boiled in ethyl acetate and decanted, then triturated with ethyl acetate and left in the refrigerator overnight to give a solid. After recrystallization from a minimum amount of methanol there was obtained 7.05 g.

Aufarbeitung

  1. additionAfter the addition the reaction mixture
  2. temperatureThe mixture was cooled again to -70° C.
  3. customSolvent was removed in vacuo
  4. additionAn additional 100 ml of methanol was added
  5. customremoved in vacuo
  6. customdecanted
  7. customtriturated with ethyl acetate
  8. customto give a solid
  9. customAfter recrystallization from a minimum amount of methanol
  10. customthere was obtained 7.05 g

Quellen und Nachweise

ORD-Eintrag
ord-ab3718a620cd45399aa01be4e3a86ee9
Quelldatensatz
uspto-grants-1986_12
Patentnummer
US04632929

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