反应详情

A method similar to that used for the preparation of (99a) was used except that 3-thiophenecarboxaldehyde (762 mg) was used as the aldehyde component to afforded the desired product (549 mg). 1H NMR (300 MHz, CDCl3) δ 3.795 (s, 3H), 5.19 (s, 2H), 5.99 (br., 1H), 7.07 (m, 1H), 7.34(m, 7H), 7.49(d, 1H, J=5 Hz), 7.77(s, 1H). LC/MS: 2.32 min.