1-Ethyl-1h-pyrazol-4-amine → (1-Ethyl-1H-pyrazol-4-yl)-[8-(4-trifluoromethyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-yl]-amine

Participants

Reaction Steps

2-Chloro-8-(4-trifluoromethyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridine was prepared from 8-bromo-2-chloro-[1,2,4-triazolo[1,5-a]pyridine (1.23 g, 5.29 mmol) and (4-trifluoromethyl-phenyl)boronic acid (1.23 g, 6.50 mmol) in a manner analogous to Example 2c. Product was isolated as a white solid (0.95 g, 62%). MP=163-165° C. 1H NMR (400 MHz, CDCl3, δ, ppm): 8.65 (d, J=6.77 Hz, 1H), 8.12 (d, J=8.09 Hz, 2H), 7.80 (d, J=8.17 Hz, 2H), 7.77 (d, J=8.40 Hz, 1H), 7.22 (t, J=7.12 Hz, 1H). MS=298 (MH)+. 215b) (1-Ethyl-1H-pyrazol-4-yl)-[8-(4-trifluoromethyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-yl]-amine was prepared from 2-chloro-8-(4-trifluoromethyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridine (0.100 g, 0.31 mmol) and 1-ethyl-1H-pyrazol-4-ylamine (0.046 g, 0.41 mmol) in a manner analogous to Example 2d. Product was isolated as a tan solid (52 mg, 44%). MP=162-164° C. 1H NMR (400 MHz, (D3C)2SO, δ, ppm): 9.37 (s, 1H), 8.77 (d, J=6.36 Hz, 1H), 8.38 (d, J=7.76 Hz, 2H), 7.85-7.97 (m, 3H), 7.81 (s, 1H), 7.47 (s, 1H), 7.11 (t, J=6.80 Hz, 1H), 4.10 (q, J=7.12 Hz, 2H), 1.36 (t, J=6.92 Hz, 3H). MS=373 (MH)+.

Provenance & Evidence