Trifluoroacetic acid → HCID 59580663, compound

Participants

Reaction Steps

To a solution of di(tert-butyl) 4-fluoro-2-(5-fluoropyridin-3-yl)-1,3-thiazol-5-ylimidodicarbonate (320 mg, 0.77 mmol) in DCM (7 mL) was added trifluoroacetic acid (TFA) (0.7 mL). The solution was stirred at room temperature for 10 minutes, before quenched slowly with saturated NaHCO3 solution. The organic layer was separated and the aqueous layer was extracted with dichloromethane (DCM). The combined organic layer was dried over Na2SO4, filtered and purified by silica gel chromatography (0 to 100% ethyl acetate/hexanes) to give product as a pale yellow solid (166 mg, 68%): mp 188-191° C.; 1H NMR (300 MHz, CDCl3) δ 8.84 (s, 1H), 8.46 (d, J=2.7 Hz, 1H), 7.85 (ddd, J=9.1, 2.6, 1.7 Hz, 1H), 6.92 (br s, 1H), 1.55 (s, 9H); ESIMS m/z 312 (M−1).

Provenance & Evidence