反应详情

The title compound was prepared (as described above for Intermediate 16) from 0.525 g of 4′-fluoroacetophenone and 0.73 mL of methyl propionate to yield 120 mg of Intermediate 32: TLC analysis: Rf=0.77 (2/1, hexanes/EtOAc); 1H NMR (400 MHz, CDCl3, enol form) δ7.98 (d, 2H, J=8.3), 7.7 (d, 2H, J=8.3), 6.12 (s, 1H), 1.55 (s, 3H); low resolution mass spectrum (ES+) 195 (MH+)