Abstract
Guanidine salts were condensed with 1-bromo-3, 3-dichloropropyl acetate (I) or β, β-dichloropropione acetal (II) in conc. sulfuric acid or in alcohol containing hydrochloric acid by which 2-aminopyrimidine was obtained in a good yield. A small amount of 2-amino-5-bromopyrimidine was formed at the same time when (I) was used as the starting material.
