3-Methylpentanoic acid → 3-Methylpentanoic anhydride

HRID 1757256Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1757256
[CH3:1][CH:2]([CH2:7][CH3:8])[CH2:3][C:4]([OH:6])=[O:5].C(O[C:13](=[O:15])[CH3:14])(=O)C>>[CH3:1][CH:2]([CH2:7][CH3:8])[CH2:3][C:4]([O:6][C:13](=[O:15])[CH2:14][CH:2]([CH3:1])[CH2:3][CH3:4])=[O:5]

Komponenten

3

Edukt 2

HCID 77553-Methylpentanoic acidHCID 7918Acetic Anhydride

Produkt 1

HCID 467790543-Methylpentanoic anhydrideAusbeute 97 %

Versuchsvorschrift

3-Methylpentanoic acid anhydride was prepared from 6 moles of 3-methylpentanoic acid and 4.5 moles of acetic acid anhydride, by distilling acetic acid and the excess acetic acid anhydride from the reaction mixture at atmospheric pressure to a pot temperature of 220° C. Thereafter the desired anhydride was purified by distillation under reduced pressure. Yield: 97% of theory.

Aufarbeitung

  1. distillationby distilling acetic acid
  2. customto a pot temperature of 220° C
  3. distillationThereafter the desired anhydride was purified by distillation under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-6f9b9986d8ee4edbae729bd88a9c6fe0
Quelldatensatz
uspto-grants-1995_08
Patentnummer
US05444162

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