2,6-Diaminopyridine → HCID 58997339, compound

Participants

Reaction Conditions

Reaction Steps

Combine 2,4,6-trifluorobenzoyl chloride (3.891 g, 20 mmol), 2,6-diaminopyridine (6.548 g, 60 mmol) and dioxane (25 mL) and stir for 1 hr. at room temperature followed by heating at 40° C. overnight. Dilute the reaction mixture with CH2Cl2 (100 mL), and wash with 0.1N NaOH solution. Extract the aqueous layer three times with CH2Cl2. Combine the organic layers, dry over Na2SO4, filter, and concentrate to a residue. Chromatography on silica gel, eluting with a gradient of 40–50% ethylacetate in hexanes gives the title intermediate (3.95 g, 74%): mass spectrum (ion spray): m/z=267.9 (M+1); 1H NMR (CDCl3, ppm):8.28 (s, br, 1H), 7.66 (d, 1H), 7.52 (t, 1H), 6.78 (m, 2H), 6.31 (d, 1H), 4.36 (s, br, 2H).

Provenance & Evidence