2-(2,2,2-trifluoroethoxy)nicotinic acid 、 2-cyclopropyl-7-ethoxy-imidazo[1,2-a]pyridin-6-amine 、
2-oxo-1-(2,2,2-trifluoroethyl)-1,2-dihydropyridine-3-carboxylic acid 在
(benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 作用下,
以7.2%的产率得到N-(2-cyclopropyl-7-ethoxyimidazo[1,2-a]pyridin-6-yl)-2-(2,2,2-trifluoroethoxy)nicotinamide