1: 95 percent / 425 °C / 0.01 Torr 2: 1) (+)-β-chlorodiisopinocamphenylborane, 2) diethanolamine / 1) THF, -30 deg C, 5 days, 2) Et2O, 2 h 3: 48 percent / mercury(II) acetate / 24 h / 135 - 140 °C 4: H2 / 10percent Pd/C / ethanol / 760 Torr View Scheme

1: 95 percent / 425 °C / 0.01 Torr 2: 1) (+)-β-chlorodiisopinocamphenylborane, 2) diethanolamine / 1) THF, -30 deg C, 5 days, 2) Et2O, 2 h 3: 48 percent / mercury(II) acetate / 24 h / 135 - 140 °C 4: H2 / 10percent Pd/C / ethanol / 760 Torr 5: 1) K2CO3, 2) triethylamine / 1) benzene, CH2Cl2, 25 deg C, 2 h, 2) CH2Cl2, 7 days View Scheme

T=425°C; P=0.01 Torr;