1: 60 percent / NaBH4-silica / diethyl ether / 18 h / Ambient temperature 2: 49 percent / t-butylhydroperoxide, titanium isopropoxide, diethyl L-(+)-tartrate / -20 deg C, 3 h. then room temp., 1 h. 3: 1.) NaIO4; 2.) NaHCO3 / 1.) RuCl3 / 1.) CCl4, CH3CN, H2O, room temp., 7 h.; 2.) DMF, room temp. View Scheme

sodium tetrahydroborate; silica gel in diethyl ether 18 h; Ambient temperature;