Acetic Anhydride → HCID 14984434, Verbindung

HRID 868773

Reaktionsgleichung

Reaktionsgleichung von HRID 868773
[C:1]([O:6][CH2:7][CH2:8][CH2:9][CH3:10])(=[O:5])[C:2]([CH3:4])=[O:3].[C:11](OC(=O)C)(=[O:13])[CH3:12]>O.C1(C)C=CC(S(O)(=O)=O)=CC=1.C(O)(=O)C>[C:11]([O:3][C:2](=[CH2:4])[C:1]([O:6][CH2:7][CH2:8][CH2:9][CH3:10])=[O:5])(=[O:13])[CH3:12]

Komponenten

5

Edukt 2

HCID 7918Acetic Anhydride2×HCID 523883Butyl pyruvate

Produkt 1

HCID 14984434HCID 14984434, VerbindungAusbeute 67,1 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 521998p-Toluenesulfonic acid monohydrateKatalysatorHCID 176Acetic AcidLösungsmittel

Reaktionsbedingungen

Temperatur
120 °C

Versuchsvorschrift

Next, in a mixture of the obtained butyl pyruvate (235 g, 1.6 mol) and acetic anhydride (333 g, 3.3 mol), p-toluenesulfonic acid monohydrate (5 g) was added. Then, the mixture was stirred under a nitrogen gas stream at 120° C. for 25 hours to obtain a second reaction solution. Next, acetic acid generated by a reaction with excess acetic anhydride under reduced pressure (5 mmHg) was removed from the second reaction solution. Thereafter, the residue was purified by reduced pressure distillation (2 mmHg, 56 to 63° C.) to obtain butyl α-acetoxyacrylate (200 g, yield 67%).

Aufarbeitung

  1. additionwas added
  2. customto obtain a second reaction solution
  3. customwas removed from the second reaction solution
  4. distillationThereafter, the residue was purified by reduced pressure distillation (2 mmHg, 56 to 63° C.)

Quellen und Nachweise

ORD-Eintrag
ord-c044d2a1fa244dfd88caa39a2fce939c
Quelldatensatz
uspto-grants-2015_03
Patentnummer
US08968975B2

Verknüpfte Notizen

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