A series of N-fluoroalkyl-8-(6-methoxy-2-methylpyridin-3-yl)-2, 7-dimethyl-N-alkylpyrazolo [1, 5-a][1, 3, 5] triazin-4-amines were prepared and evaluated as potential CRF1R PET imaging agents. Optimization of their CRF1R binding potencies and octanol–phosphate buffer phase distribution coefficients resulted in discovery of analog 7e (IC50= 6.5 nM, logD= 3.5).