5-chloro-4-(2,2,2-trifluoro-ethoxy)-pyridine-2-carboxylic acid 、
2-amino-3-methanesulfonyl-2-methyl-propionitrile 以isolated (583 mg, 56%) as a white solid的产率得到5-chloro-4-(2,2,2-trifluoro-ethoxy)-pyridine-2-carboxylic acid (1-cyano-2-methanesulfonyl-1-methyl-ethyl)-amide