Benzyl Alcohol → Benzyl 3-bromopropanoate

HRID 1459695Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1459695
O.[C:2]1([CH3:12])[CH:7]=[CH:6][C:5](S(O)(=O)=O)=[CH:4][CH:3]=1.[Br:13][CH2:14][CH2:15][C:16]([OH:18])=[O:17].C(O)C1C=CC=CC=1>C1C=CC=CC=1>[CH2:12]([O:18][C:16](=[O:17])[CH2:15][CH2:14][Br:13])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Komponenten

5

Edukt 3

HCID 244Benzyl AlcoholHCID 115533-Bromopropionic acidHCID 521998p-Toluenesulfonic acid monohydrate

Produkt 1

HCID 252570Benzyl 3-bromopropanoateAusbeute 56 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 241BenzeneLösungsmittel

Versuchsvorschrift

A spatula tip full of p-toluenesulfonic acid monohydrate was added to a solution of 3-bromopropionic acid (20.49 g, 0.134 mol) and benzyl alcohol (15 mL, ~ 15.7 g, 0.145 mol) in benzene (150 mL). A Dean-Stark trap was fitted to the reaction vessel and the solution was held at reflux with overnight stirring. After 16 hr at reflux, the reaction was cooled, washed with saturated sodium bicarbonate, dried (Na2SO4), and concentrated to an oil (28.78 g). Fractional distillation at reduced pressure (0.18 torr) gave the desired product as a colorless liquid (18.49 g, 56%) boiling in the range 99°-109° C.

Aufarbeitung

  1. customA Dean-Stark trap was fitted to the reaction vessel
  2. temperatureat reflux with overnight
  3. temperatureAfter 16 hr at reflux
  4. temperaturethe reaction was cooled
  5. washwashed with saturated sodium bicarbonate
  6. dry with materialdried (Na2SO4)
  7. concentrationconcentrated to an oil (28.78 g)
  8. distillationFractional distillation at reduced pressure (0.18 torr)

Quellen und Nachweise

ORD-Eintrag
ord-fa166e0ebb5c4a788fedb68a6dd51e86
Quelldatensatz
uspto-grants-1998_12
Patentnummer
US05854277

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