Reaction Steps
Odor: Marine, aquatic. -IR (film): ν=1502/1435/1580 cm−1 (ν C═C, Ar), 1265/1304/1201 cm−1 (ν ring), 1051 cm−1 (ν C—O—C), 1741 cm−1 (ν C═O). -1H-NMR (CDCl3): δ=0.88 (t, J=6.8 Hz, 3H, 6′-H2), 1.27-1.35 (m, 6H, 3′-H2-5′-H2), 1.57 (br. quint, J=8.0 Hz, 2H, 2′-H2), 2.51 (t, J=7.8 Hz, 2H, 1′-H2), 4.68 (d, J=8.0 Hz, 4H, 2-, 4-H2), 6.77 (dd, J=8.0, 4.0 Hz, 1H, 8-H), 6.81 (d, J=4.0 Hz, 1H, 6-H), 6.90 (d, J=8.0 Hz, 1H, 9-H). -13C-NMR (CDCl3): δ=13.96 (q, C-6′), 22.46 (t, C-5′), 28.77 (t, C-3′), 31.19/31.56 (2t,C-2′,-4′), 34.89 (t, C-1′), 75.35/75.63 (2t, C-2,-4), 120.31/120.47 (2d, C-6,-9), 123.50 (d, C-8), 138.85 (s, C-7), 146.03/147.83 (2s, C-5a,-9a), 204.73 (s, C-3). -MS (EI): m/z (%) =77 (16)[C8H6+], 91 (9) [C7H7+], 135 (9) [M+-C5H11—C2H2O], 149 (21) [M+-C5H11—CO], 177 (100) [M30 -C5H11], 191 (2) [M+-C4H9], 205 (3) [M+-C3H7], 248 (43) [M+].
