“…17 (3-Hydroxypent-1-en-1-yl)diphenylphosphine Oxide [3k (E + Z)]. 18 White solid. 1 H NMR: δ (ppm) 7.68−7.59 (m, 4H, E + Z), 7.49−7.34 (m, 6H, E + Z), 6.82−6.67 (m, 1H, E + Z), 6.49 (ddd, J 1 = 2.0 Hz, J 2 = 16.8 Hz, J 3 = 24.8 Hz, E), 6.08 (ddd, J 1 = 1.6 Hz, J 2 = 13.6 Hz, J 3 = 25.2 Hz, Z), 5.39 (b, 1H, Z), 4.52−4.46 (m, 1H, Z), 4.22− 4.20 (m, 1H, E), 1.66−1.47 (m, 1H, E + Z), 0.89 (t, J = 7.2 Hz, E + Z).…”