Vinyl isobutyl ether → HCID 54165959, Verbindung

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a stirred solution of (R)-N,N-diisopropyl-3-(2-benzyloxy-5-bromophenyl)-3-phenylpropanamine (Example 12) (10.2 g, 21.23 mmol) in DMF (100 mL) under nitrogen atmosphere at room temperature were sequentially added triethylamine (2.58 g, 25.47 mmol), TlOAc (6.15 g, 23.35 mmol), isobutylvinylether (14 mL, 106.14 mmol), DPPP (0.87 g, 2.12 mmol) and Pd(OAc)2 (0.24 g, 1.06 mmol). The reaction temperature was raised to 100° C. and stirred for 3 hours, cooled to room temperature, filtered and treated with HCl (5%, 250 mL) and stirred for another 2 hours. The reaction mixture was repeatedly extracted with dichloromethane and the combined organic layers were dried (MgSO4), filtered and the solvent evaporated. Triethylamine and DMF were destined off under reduced pressure to yield 9 g (98%); 1H NMR (CDCl3) δ1.22 (m, 12H), 2.52-2.70 (m, 7H), 3.40 (br, 2H), 4.34 (t, 1H), 5.10 (s, 1H), 6.90 (d, 1H), 7.17-7.40 (m, 10H), 7.82 (m, 1H) and 7.92 (s, 1H).

Herkunft & Nachweise