反应详情

Trifluoroacetic acid (55 mL) is added dropwise to a solution of triethylsilane (1.95 mL, 12.18 mmol, d=0.728) and 2-(2-Fluoro-phenoxy)-3-(4-{2-[1-(4-methoxy-benzyl)-3-methyl-2-oxo-imidazolidin-4-yl]-ethoxy}-phenyl)-2-methyl-propionic acid ethyl ester (3.44 g, 6.09 mmol). The reaction mixture is stirred under nitrogen at ambient temperature for 2 h, then concentrated. The residue is diluted with ethyl acetate, then washed. The organic layer is dried and concentrated in vacuo to provide the title compound (2.7 g, 78%). 1H NMR (400 MHz, CDCl3): δ 7.20 (d, 2H, J=8.7 Hz), 7.06-7.01 (m, 1H), 6.97-6.87 (m, 3H), 6.79 (d, 2H, J=8.7 Hz), 5.04-4.98 (m, 1H), 4.20 (q, 2H, J=6.8 Hz), 4.02 (t, 2H, J=6.8 Hz), 3.76-3.69 (m, 1H), 3.55 (t, 1H, J=8.7 Hz), 3.26, 3.14 (ABq, 2H, J=14.5 Hz), 3.21 (t, 1H, J=8.7 Hz), 2.78 (s, 3H), 2.27-2.20 (m, 1H), 1.99-1.90 (m, 1H), 1.38 (s, 3H), 1.23 (t, 3H, J=6.8 Hz), 0.96 (t, 2H, J=7.7 Hz). MS [EI+] 445 (M+H)+.

1. concentrationconcentrated
2. additionThe residue is diluted with ethyl acetate
3. washwashed
4. customThe organic layer is dried
5. concentrationconcentrated in vacuo