5-(3-Chloro-4-trifluoromethyl-phenyl)-7-trifluoromethyl-pyrazolo[1,5-a]pyrimidine-3-carboxylic acid → 5-{5-[5-(3-Chloro-4-trifluoromethyl-phenyl)-7-trifluoromethyl-pyrazolo[1,5-a]pyrimidin-3-yl]-[1,2,4]oxadiazol-3-yl}-pyrimidin-2-ylamine

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The title compound was prepared from 5-(3-chloro-4-trifluoromethyl-phenyl)-7-trifluoromethyl-pyrazolo[1,5-a]pyrimidine-3-carboxylic acid (example C.17) (205 mg, 0.5 mmol) and 2-amino-N-hydroxy-pyrimidine-5-carboxamidine (example B.5) (115 mg, 0.75 mmol) according to general procedure II. Obtained after flash chromatography on silica gel (ethyl acetate/heptane) and further purification by crystallization (dichloromethane/hexane) as a yellow solid (150 mg, 57%). MS (EI) 526.1 [(M)+]; mp 279° C.

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