1: 4-Methylpyridine With fluorine in chloroform T=-78 - -60°C; 2: p-(trifluoromethyl)phenyl isonitrile With trimethylsilylazide in chloroform T=-50 - 0°C;

sodium azide; p-toluenesulfonyl chloride in toluene T=120°C; 48 h;