Chlorotrimethylsilane → 3-Oxo-3-[(pyridin-3-yl)amino]propanoic acid

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Reaction Steps

To a suspension of pyridine-3-amine (1 g, 10.6 mmol) in DCM (100 mL) was added TMSCl (1.3 mL, 10.6 mmol) at room temperature. The reaction mixture was stirred for 30 min. 2,2-Dimethyl-1,3-dioxane-4,6-dione (1.44 g, 10.6 mmol) was added and the combined mixture stirred overnight and concentrated under reduced pressure. The residue was dissolved in dilute NaHCO3 solution and washed with EtOAc. The aqueous phase was collected and acidified with conc. HCl to pH˜3 and extracted with EtOAc. The extract was dried over anhydrous Na2SO4, filtered and concentrated. The remaining solid was purified by flash chromatography (eluent CHCl3/MeOH/AcOH 8:1:0.1) to afford the title compound 39 as a white solid (0.5 g, 26% yield). 1H NMR (DMSO-d6) δ (ppm): 12.04 (bs, 1H), 9.67 (s, 1H), 8.18 (d, 1H), 8.01 (d, 1H), 7.29 (m, 1H), 2.97 (s, 2H). MS (m/z): 181.1 (M+H).

Provenance & Evidence