反应详情

The procedure as described above for synthesis of (5a) was used, except that compound (4a) was replaced with compound (4b). 1H NMR (300 MHz) (CDCl3) δ 7.43-6.72 (m, 8H), 5.58 (s, 1H), 2.66-2.61 (t, 2H), 1.71-1.66 (m, 2H), 1.39-1.35 (m, 10H), 0.99-0.95 (t, 3H).