Dimethylformamide → HCID 86719972, compound

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Reaction Steps

Add cesium carbonate (3 Eq, 53.05 mmoles; 17.2 g) to a solution of 2-fluoro-5-hydroxypyridine (2.0 g, 1.00 Eq, 17.68 mmoles) in dimethylformamide (0.3 M; 762.37 mmoles; 59.0 mL), followed by 2-(2-bromoethoxy)tetrahydro-2H-pyran (17.7 mmoles, 3.7 g) and stir at room temperature overnight. Transfer to a separatory funnel and add EtOAc (500 mL). Wash organic layer, wash with water (300 mL) followed by brine (200 mL). Dry over Na2SO4, filter and concentrate. Purify the crude mixture by HPLC eluting with hexanes/EtOAc 7/3 to give 2-fluoro-5-[2-(tetrahydro-2H-pyran-2-yloxy)ethoxy]pyridine as a pale yellow oil (3.9 g, 16.2 mmoles; 91% yield). LCMS (Low) rt=1.8 min., M+1=242.

Provenance & Evidence