1: TiCl4 / CH2Cl2 / 12 h / -78 °C 2: 92 percent / DMAP, i-Pr2NEt / CH2Cl2 / 18 h / 0 °C 3: 91 percent / LDA / tetrahydrofuran / 0.5 h / -78 °C 5: 1) LDA / 1) -78 deg C 6: 94 percent / Et3N / (Ph3P)2PdCl2 / 75 °C 7: H2, Lindlar catalyst, quinoline / hexane 8: 2,2,4-trimethyl-pentane / Heating 9: 82 percent / ion-exchange resin AG 50W-X4 / methanol / 48 h / Ambient temperature; in the dark View Scheme