Ammonium Hydroxide → 4-Amino-4-ethoxy-1,1,1-trifluorobut-3-en-2-one

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Reaction Steps

To a solution of 4,4-diethoxy-1,1,1-trifluorobut-3-en-2-one (7.94 g, 37.4 mmol) in MeCN (30 mL) at room temperature was dropped 28% solution of NH4OH in water (7 mL). It was stirred at room temperature overnight. After solvent was removed under reduced pressure, to it was added CH2Cl2 and washed with water. The organic layer was dried over MgSO4 and concentrated under reduced pressure to afford (E)-4-amino-4-ethoxy-1,1,1-trifluorobut-3-en-2-one as solid (6.371 g, 93%). 1H NMR (300 MHz, CDCl3) δ 9.79 (br, 1H), 5.66 br, 1H), 5.13 (s, 1H), 4.15 (q, 2H), 1.38 (t, 3H); LC-MS (ESI) m/z 184 (M+H)+.

Provenance & Evidence