反应详情

4-Chlorobenzyl chloride (0.04 g, 0.174 mmol) and tetrabutyl ammonium iodide (catalytic amount) are added to a 0° C. suspension of 2-butoxy-2-methyl-3-{4-[2-(3-methyl-2-oxo-imidazolidin-4-yl)-ethoxy]-phenyl}-propionic acid ethyl ester (0.047 g, 0.116 mmol) and sodium hydride (0.012 g, 0.29 mmol, 60% suspension on mineral oil), pre-stirred for 1 h at ambient temperature. The reaction mixture is stirred at ambient temperature 48 h, diluted with ethyl acetate, and washed with 1N HCl and water. The organic layer is dried, concentrated, and purified by LCMS to provide the title compound. 1H NMR (400 MHz, CDCl3): δ 7.27 (d, 2H, J=8.7 Hz), 7.17 (d, 2H, J=8.7 Hz), 7.07 (d, 2H, J=8.7 Hz), 7.71 (d, 2H, J=8.7 Hz), 4.34, 4.32 (ABq, 2H, J=15.0 Hz), 3.95 (t, 3H, J=5.9 Hz), 3.69-3.62 (m, 1H), 3.61-3.55 (m, 1H), 3.51-3.45 (m, 1H), 3.38 (t, 1H, J=8.7 Hz), 3.04-2.93 (m, 3H), 2.84 (s, 3H), 2.26-2.18 (m, 1H), 1.92-1.84 (m, 1H), 1.62-1.54 (m, 2H), 1.49 (s, 3H), 1.42-1.33 (m, 3H), 0.93 (t, 3H, J=7.3 Hz). MS [EI+] 503 (M+H)+, [EI−] 501 (M−H)+.

1. stirringThe reaction mixture is stirred at ambient temperature 48 h
2. washwashed with 1N HCl and water
3. customThe organic layer is dried
4. concentrationconcentrated
5. custompurified by LCMS