Triethylamine → 6-Fluoro-3-(4-triisopropylsilanyloxyethyl-piperidin-1-yl)-[1,2,4]triazolo[4,3-a]pyridin

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Reaction Steps

To a solution of Intermediate 66a (319 mg, 1.21 mmol) and Et3N (252 μL, 1.82 mmol) in DCM (10 mL) was added triisopropylsilyltrifluoromethane sulfonate (319 μL, 1.45 mmol) and the mixture stirred at RT for 1.5 h. The mixture was washed with sat. aq. NaHCO3 solution, dried and concentrated in vacuo. The residue was purified by FCC, using 0-10% MeOH in DCM, to give the title compound as an orange solid (465 mg, 92%). LCMS (Method 3): Rt 5.35 min, m/z 421 [MH+].

Provenance & Evidence