1: 86 percent / NaOMe, oxalic acid / methanol / 1.) reflux, 12 h, 2.) room temp., 5 h 2: 94 percent / n-BuLi / hexane; tetrahydrofuran / 0.5 h / -78 °C 3: 96 percent / POCl3, DMF / trichloroethene / Ambient temperature 4: 89 percent / H2, Li2CO3 / 5percent Pt/C, 5percent Pd/C / ethanol / 9 h / Ambient temperature; 1.) 6 h, 2.) 3 h View Scheme