trifluoroacetic acid in methanol 1 h;

Yield given. Multistep reaction. Yields of byproduct given;

Multi-step reaction with 6 steps 1: 80 percent / LDA / tetrahydrofuran / 1.) -40 to -50 deg C, 30 min, 2.) -75 deg C, 14 h2: 83 percent / H2, pyridine / 10percent Pd/C / ethanol; tetrahydrofuran / 14 h / 2585.7 Torr / Ambient temperature3: 99 percent / LAH / tetrahydrofuran / 1.) r.t. 2 h, 2.) reflux, overnight4: 96 percent / CSA / 24 h / Ambient temperature5: 91 percent / CrO3, pyridine / CH2Cl2 / 48 h / Ambient temperature6: 72 percent / <(C6H5)3P>3RhCl / benzene / 5 h / Heating