反应详情

Prepared analogously to Compound 27D replacing 5-fluoro-1H-benzo[d][1,3]oxazine-2,4-dione (Compound 27E) with 5-Chloro-1H-benzo[d][1,3]oxazine-2,4-dione (Compound 28E). 1H NMR (CDCl3, 500 MHz) δ=2.95 (d, J=5.2 Hz, 3H), 6.02 (brs, 2H), 6.89 (d, J=8.8 Hz, 1H), 7.25 (d, J=8.8 Hz, 1H), 7.79 (brs, 1H).