4-Acetamidophenylacetonitrile → N-{4-[5-Amino-1-(2-fluoro-4-trifluoromethyl-phenyl)-1H-[1,2,3]triazol-4-yl]-phenyl}-acetamide

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To a stirred and ice-cooled solution of potassium tert-butoxide (0.432 g, 3.6566 mmol) in tert-butanol (15 ml), commercial 4-acetamidophenylacetonitrile (0.5096 g, 2.9252 mmol) and 1-azido-2-fluoro-4-trifluoromethyl-benzene (0.500 g, 2.4377 mmol) are added under a nitrogen atmosphere and the reaction mixture is allowed to attain spontaneously room temperature (1 h) and finally refluxed for 6 h. The resulting reaction mixture is concentrated, added water, and extracted with ethylacetate (3×100 ml). The combined organic layers are dried over MgSO4, filtered and evaporated, to afford a dark brown gummy material (0.900 g, 97% mass balance). The crude residue is purified by column chromatography over silica gel (230-400 mesh), eluting with 50% ethylacetate in petroleum ether, to obtain the title compound as a light yellow solid (0.270 g, 30% yield). M.p. 114.8-116.2° C. LC-ESI-HRMS of [M+H]+ shows 380.1125 Da. Calc. 380.113447 Da, dev. −2.5 ppm.

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