Hydrochloric Acid → 4-{[(Benzyloxy)carbonyl]amino}-2-hydroxybenzoic acid

HRID 1715239

Reaktionsgleichung

Reaktionsgleichung von HRID 1715239
[Na].[NH2:2][C:3]1[CH:4]=[C:5]([OH:12])[C:6](=[CH:10][CH:11]=1)[C:7]([O-:9])=[O:8].[CH2:13]([O:20][C:21](Cl)=[O:22])[C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1.Cl>[OH-].[Na+]>[CH2:13]([O:20][C:21]([NH:2][C:3]1[CH:11]=[CH:10][C:6]([C:7]([OH:9])=[O:8])=[C:5]([OH:12])[CH:4]=1)=[O:22])[C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1

Komponenten

5

Edukt 3

HCID 313Hydrochloric AcidHCID 10387Benzyl chloroformateHCID 178507646HCID 178507646, Verbindung

Produkt 1

HCID 2460304-{[(Benzyloxy)carbonyl]amino}-2-hydroxybenzoic acidAusbeute 68,6 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 14798Sodium HydroxideLösungsmittel

Versuchsvorschrift

To a solution of sodium-p-aminosalicylate (Aldrich)(100 g, 0.65 mol) in 10% aqueous NaOH solution (1000 ml) is added 50% wt solution of benzylchloroformate (670 g, 1.96 mol in toluene) at 0° C. The resulting mixture is stirred at rt for 48 h. The progression of the reaction is followed by NMR. The reaction mixture is cooled down to 0° C. and acidified with 10% aqueous HCl. The solid obtained is filtered and washed with cold water and dried. It is further treated with petroleum ether and filtered to give crude 4-{[(benzyloxy)carbonyl]amino}-2-hydroxy benzoic acid (128 g, 68%).

Aufarbeitung

  1. temperatureThe reaction mixture is cooled down to 0° C.
  2. customThe solid obtained
  3. filtrationis filtered
  4. washwashed with cold water
  5. customdried
  6. additionIt is further treated with petroleum ether
  7. filtrationfiltered

Quellen und Nachweise

ORD-Eintrag
ord-7a7e6e72635e43bcaa7602f74ddff761
Quelldatensatz
uspto-grants-2010_09
Patentnummer
US07799814B2

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