反应详情

The title compound was prepared following the method for preparing Intermediate 6 except that 3-amino-3-(3,4-dimethoxy-phenyl)propionic acid was substituted with 3-amino-3-(3-methoxy-4-ethoxy-phenyl)propionic acid. 1H NMR (CDCl3): δ 6.79-6.90 (m, 3H), 4.37 (q, 1H, J=5 Hz), 4.06 (q, 2H, J=5 Hz), 3.86 (s, 3H), 3.67 (s, 3H), 2.63 (d, 2H, J=5 Hz), 1.80 (s, 2H), 1.43 (t, 3H, J=5 Hz).