1: Et3N / CH2Cl2 / 3 h 2: pyridine*HF / 2 h / Ambient temperature 3: 1,3,5-trimethyl-benzene / 3.5 h / 165 °C 4: 63 percent / KF, KHCO3, 30 percent aq. H2O2 / tetrahydrofuran; methanol / 1.5 h / Heating 5: pyridine, DMAP / CH2Cl2 / 0.5 h / Ambient temperature 6: AIBN, tributyltin hydride / benzene / 1 h / Heating 7: 88 percent / LiAlH4 / tetrahydrofuran; diethyl ether / 18 h / Ambient temperature View Scheme