反应详情

119B was prepared from 119A using a procedure similar to that used in the preparation of 118E. 1H NMR (400 MHz, CDCl3) δ ppm 1.23 (t, J=7.47 Hz, 3H) 2.64 (q, J=7.62 Hz, 2H) 3.89 (s, 3H) 5.76 (s, 1H) 6.86 (dd, J=7.91, 2.20 Hz, 1H) 6.98 (dd, J=5.93, 1.98 Hz, 1H).