Tetrabutylammonium Fluoride → 5-(4-Chlorophenyl)-2-ethynyl-3-fluoropyridine

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Reaction Steps

1.14 g (3.61 mmol) of TBAF was added at RT to a solution of 1.25 g (3.61 mmol) of 2-[(tert-butyldimethylsilanyl)ethynyl]-5-(4-chlorophenyl)-3-fluoropyridine in 30 mL of DCM and the mixture was stirred for 2 hours. The organic phase was washed with water, dried over sodium sulfate, and evaporated down in vacuo. The residue was stirred with PE, the precipitate was filtered off, washed with PE, and dried in the air. Yield: 0.72 g (86% of theoretical); C13H7ClFN (M=231.653); calc.: molpeak (M+H)+: 232/234 (Cl); found: molpeak (M+H)+: 232/234 (Cl); HPLC-MS: 5.81 minutes (method B).

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