2-Hydroxy-4-methyl-hydratropic acid phenylurethane → 2-(4-Tolyl)propanoic acid

HRID 358286

Reaktionsgleichung

Reaktionsgleichung von HRID 358286
C1(NC(OCC)=O)C=CC=CC=1.O[C:14]1[CH:24]=[C:23]([CH3:25])[CH:22]=[CH:21][C:15]=1[CH:16]([CH3:20])[C:17]([OH:19])=[O:18].[H][H]>C(O)(=O)C.[Pd]>[CH3:25][C:23]1[CH:22]=[CH:21][C:15]([CH:16]([CH3:20])[C:17]([OH:19])=[O:18])=[CH:14][CH:24]=1

Komponenten

5

Edukt 2

HCID 705129172-Hydroxy-4-methyl-hydratropic acid phenylurethaneHCID 178418361HCID 178418361, Verbindung

Produkt 1

HCID 1508662-(4-Tolyl)propanoic acidAusbeute 67 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 23938PalladiumKatalysatorHCID 176Acetic AcidLösungsmittel

Versuchsvorschrift

3 g. of 2-hydroxy-4-methyl-hydratropic acid phenylurethane are dissolved in acetic acid. To the solution 0.4 g. of a 5% palladium-on-charcoal catalystand the mixture is hydrogenated at 25° C. until the calculated amount of hydrogen is used up. The catalyst is filtered off and the filtrate is evaporated. The residue is admixed with a 10% aqueous hydrochloric acid solution and the separated oil is extracted with chloroform. The chloroform solution is dried over sodium sulphate and evaporated. 1.1 g. (67%) of 4-methyl-hydratropic acid are obtained.

Aufarbeitung

  1. filtrationThe catalyst is filtered off
  2. customthe filtrate is evaporated
  3. extractionthe separated oil is extracted with chloroform
  4. dry with materialThe chloroform solution is dried over sodium sulphate
  5. customevaporated

Quellen und Nachweise

ORD-Eintrag
ord-63815bf459344ee2a79fc079d2e70945
Quelldatensatz
uspto-grants-1984_08
Patentnummer
US04465855

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