The synthesis and SAR of a series of triazolopyrimidines as anticancer agents are described. Treatment of 5-chloro-6-(trifluorophenyl)-N-fluoroalkyl [1, 2, 4] triazolo [1, 5-a] pyrimidin-7-amine with an alcohol, a thiol, or an alkylamine provided the corresponding final compounds. A clear SAR requirement has been established for optimal activity. A (1 S)-2, 2, 2-trifluoro-1-methylethylamino group or an achiral 2, 2, 2-trifluoroethylamino group is ...