反应详情

Yellow powder; mp 157-158° C.; UV (MeOH) λmax (log ε) 373 (4.23), 205 (4.43) nm; IR (NaCl) γmax 3350, 2923, 1645, 1558, 1508 cm−1; 1H NMR (CD3OD, 500 MHz) δ 1.75 (3H, s, H-4″), 1.76 (3H, s, H-5″), 3.27 (2H, d, J=7.2 Hz, H-1″), 5.34 (1H, m, H-2″), 6.29 (1H, s, H-3′), 6.85 (2H, d, J=8.5 Hz, H-3), 7.54 (1H, d, J=15.4 Hz, H-a), 7.59 (2H, d, J=8.5 Hz, H-2), 7.72 (1H, s, H-6′), 7.76 (1H, d, J=15.3 Hz, H-β); 13C NMR (CD3OD, 125 MHz) δ 17.8 (C-4″), 26.0 (C-5″), 28.9 (C-1″), 103.4 (C-3′), 114.4 (C-1′), 117.0 (C-3), 118.6 (C-o), 122.2 (C-5′), 124.2 (C-2″), 127.4 (C-1), 131.9 (C-2), 132.4 (C-6′), 133.1 (C-3″), 145.4 (C-β), 161.5 (C-4), 164.6 (C-4′), 165.5 (C-2′), 193.4 (CO); EIMS m/z 324 (M+, 100), 231 (10), 205 (77), 147 (12).