Reaktion #55964

Reaktionsgleichung

sodium

phenyl azide

ethyl cyanoacetate

→

Ethyl 5-amino-1-phenyl-1,2,3-triazole-4-carboxylate

Lösungsmittel

water

ethanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.STIRRINGAfter stirring at ambient temperature for a further 15 minutes the flask
2. 2
   SonstigeA white solid separated which
3. 3
   Filtrationwas filtered off after dilution of the mixture with water
4. 4
   Waschenwashed with water
5. 5
   SonstigeRecrystallisation from ethanol
6. 6
   Sonstigegave 18.4 g

Vorschrift

A solution of sodium (2.04 g; 0.089 mole) in ethanol (50 ml) was added to a mixture of phenyl azide (11.9 g; 0.1 mole) and ethyl cyanoacetate (11.3 g; 0.1 mole) and the product gently warmed to 45° C. with stirring for 5 mins. After stirring at ambient temperature for a further 15 minutes the flask was immersed in water at room temperature for 3 hrs. A white solid separated which was filtered off after dilution of the mixture with water and washed with water. Recrystallisation from ethanol gave 18.4 g. (79%) of material of mp 124.5-125.5° C. (lit mp 126°; B. R. Brown, D. L. Hammick and S. G. Heritage J. Chem. Soc. 3820 [1953]).

Quelle