2-Aminopyrimidine → HCID 20145062, compound

Participants

Reaction Steps

A solution of ethyl 2-amino-5-(2-bromoacetyl)-4-thiazolecarboxylate (5.9 g), 2-aminopyrimidine (5.7 g) and triethylamine (8.4 ml) in ethanol (100 ml) was refluxed for 6 hours. The reaction mixture was evaporated in vacuo. To the residue was added a mixture of water and ethyl acetate, and the resulting mixture was acidified to pH 0.5 with conc. hydrochloric acid. The separated aqueous layer was treated with charcoal and filtered. To the filtrate was added ethyl acetate and the resulting mixture was adjusted to pH 7.0 with 20% aqueous potassium carbonate. The precipitate was collected by filtration, washed successively with water, ethyl acetate and ethanol, and dried over phosphorus pentoxide to give 2-(2-amino-4-ethoxycarbonyl-5-thiazolyl)imidazo[1,2-a]pyrimidine (1.6 g). mp 282° C. (dec.).

Provenance & Evidence