反应详情

The title compound was prepared (as described above for Intermediate 16) from 2.0 g of 2′-fluoroacetophenone and 2.86 mL of EtOAc to yield Intermediate 20: 1H NMR (400 MHz, CDCl3, enol form) δ7.70 (dt, 1H. J=1.79, 7.69), 7.45 (m, 1H), 7.24 (m, 1H), 7.10 (m, 1H), 6.28 (s, 1H), 2.20 (s, 3H).