1-(3-Ethoxy-4-trifluoromethyl-phenyl)-4,4,4-trifluoro-butane-1,3-dione → 3-Bromo-5-(3-ethoxy-4-trifluoromethyl-phenyl)-7-trifluoromethyl-pyrazolo[1,5-a]pyrimidine

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반응 단계

Prepared from 1-(3-ethoxy-4-trifluoromethyl-phenyl)-4,4,4-trifluoro-butane-1,3-dione (example C.3 step 1) (8.00 g, 24 mmol) and commercially available 3-amino-4-bromopyrazole (4.03 g, 24 mmol) as described in example C.1 step 2a to give the 3-bromo-5-(3-ethoxy-4-trifluoromethyl-phenyl)-7-trifluoromethyl-pyrazolo[1,5-a]pyrimidine (10.12 g, 91%) as a yellow solid. MS (ISP) 454.0 [(M+H)+] and 456.0 [(M+2+H)+].

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