Tributylphosphine → (E)-(S)-2-ethoxy-3-[4-(3-methyl-5-phenyl-pent-2-en-4-ynyloxy)-phenyl]-propionic acid ethyl ester

Beteiligte Stoffe

Reaktionsschritte

The title compound was prepared from of (E)-3-methyl-5-phenyl-pent-2-en-4-yn-1-ol (0.172 g, 1.0 mmol), (J. Med. Chem. 1998, 41(14), 2524-2536), tributylphosphine (0.370 mL, 1.5 mmol), 1,1′-(azodicarbonyl)dipiperidine (0.378 g, 1.5 mmol) and (S)-ethyl 2-ethoxy-3-(4-hydroxy-phenyl)-propionate (0.262 g, 1.1 mmol) in dry benzene (20 mL) by a procedure analogous to that described in example 3, yielding 0.276 g (68%) of (E)-(S)-2-ethoxy-3-[4-(3-methyl-5-phenyl-pent-2-en-4-ynyloxy)-phenyl]-propionic acid ethyl ester. 1H NMR (300 MHz, CDCl3) δ: 1.1-1.25 (6H, m), 1.98 (3H, d), 2.95 (2H, d), 3.29-3.4 (1H, m), 3.53-3.65 (1H, m), 3.95 (1H, t), 4.15 (2H, q), 4.60 (2H, dd), 6.15 (1H, dt), 6.8 (2H, d), 7.15 (2H, d), 7.20-7.3 (3H, m), 7.35-7.45 (2H, m).

Herkunft & Nachweise