Reaction #1265402

Reaction equation

2,5,6-triamino-4-ethoxy-pyrimidine

glyoxal

→

title compound

2-amino-4-ethoxy-pteridin

Solvents

ethanol

Conditions

Workup

1. 1
   TemperatureThe reaction mixture was refluxed for 4 hours
2. 2
   FiltrationSome insoluble material was filtered off
3. 3
   ConcentrationThe filtrate was concentrated in vacuo
4. 4
   Otherthe residue purified by flash chromatography (silica

Procedure

To a solution of 2,5,6-triamino-4-ethoxy-pyrimidine (10.54 g, 62.37 mmoles) in ethanol (160 ml) was added glyoxal (40% solution in water, 2.7 ml, 18.6 mmoles). The reaction mixture was refluxed for 4 hours. Some insoluble material was filtered off. The filtrate was concentrated in vacuo and the residue purified by flash chromatography (silica, using a CH3OH/CH2Cl2 mixture (5:95) as the eluent), providing the pure title compound (7.34 g, yield: 62%). The spectral data of the product are identical with the literature data (W. Pfleiderer et al. cited supra).

Source