Ammonia → HCID 178519929, Verbindung

HRID 356287Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 356287
[C:1]([OH:5])(=O)[CH2:2]O.[Cl:6][C:7]1[N:12]=[C:11]([NH2:13])[C:10]([NH2:14])=[CH:9][CH:8]=1.Cl.N>>[Cl:6][C:7]1[N:12]=[C:11]2[NH:13][C:2]([CH2:1][OH:5])=[N:14][C:10]2=[CH:9][CH:8]=1

Komponenten

5

Edukt 4

HCID 222AmmoniaHCID 313Hydrochloric AcidHCID 757Glycolic AcidHCID 106306156-Chloropyridine-2,3-diamine

Produkt 1

HCID 178519929HCID 178519929, VerbindungAusbeute 83,4 %

Reaktionsbedingungen

Temperatur
150 °C

Versuchsvorschrift

6.60 g of glycolic acid were added to 5.00 g of 6-chloro-2,3-diaminopyridine (prepared as described in Preparation 42), and the resulting mixture was stirred at 150° C. for 4 hours. At the end of this time, the reaction mixture was treated with 3N aqueous hydrochloric acid and subsequently made alkaline by the addition of aqueous ammonia. The aqueous mixture was evaporated to dryness, and the resulting residue was purified by column chromatography through silica gel, using a gradient elution method, with mixtures of ethyl acetate and methanol in ratios ranging from 1:0 to 10:1 by volume as the eluent. The product was then crystallized by trituration with ethyl acetate, to give 5.33 g of the title compound, melting at 224°-226° C.

Aufarbeitung

  1. customThe aqueous mixture was evaporated to dryness
  2. customthe resulting residue was purified by column chromatography through silica gel
  3. washa gradient elution method
  4. customThe product was then crystallized by trituration with ethyl acetate

Quellen und Nachweise

ORD-Eintrag
ord-9092622409124b628041e6f900e0e4ab
Quelldatensatz
uspto-grants-1998_11
Patentnummer
US05834501

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