1.1: 96 percent / PPh3 / Pd2(dba)3 / dimethylformamide / 0.75 h / 50 °C 2.1: 92 percent / TBAF / tetrahydrofuran / 0.5 h / 0 °C 3.1: 98 percent / DMAP; Et3N / CH2Cl2 / 0.75 h / 20 °C 4.1: LDA / diethyl ether / 1.17 h / -78 °C 4.2: CpTiCl(1,2:5,6-di-O-isopropylidene-α-L-glucofuranos-3-O-)2 / diethyl ether / 1.5 h / -78 - -30 °C 4.3: 85 percent / diethyl ether; H2O / 3.5 h / -78 - 20 °C 5.1: 57 percent / Cl2Ru(PCy3)(=CHPh)(N,N'-Mes2-imidazolidin-2-yl) / toluene / 25 h / 110 °C 6.1: 86 percent / nanosize Zn; AcOH / tetrahydrofuran / 0.17 h 7.1: 86 percent / potassium diazodicarboxylate; AcOH / CH2Cl2 / Heating View Scheme