1: 90 percent / sodium / platinum hydrosilylation catalyst / tetrahydrofuran / 24 h / Heating 2: 95 percent / diethyl L-tartrate; Ti(OiPr)4; tBuOOH View Scheme

1: PPTS; ethanol / 7 h / 55 °C 2: REDAL / toluene; diethyl ether / 3 h / 0 - 20 °C 3: 82 percent / t-butylhydroperoxide; (+)-diethyl tartrate; titanium tetraisopropoxide / CH2Cl2; 2,2,4-trimethyl-pentane / 5 h / -20 °C View Scheme

1.1: n-BuLi / tetrahydrofuran / 0.5 h / -40 °C 1.2: tetrahydrofuran / 20 °C 2.1: PPTS; ethanol / 7 h / 55 °C 3.1: REDAL / toluene; diethyl ether / 3 h / 0 - 20 °C 4.1: 82 percent / t-butylhydroperoxide; (+)-diethyl tartrate; titanium tetraisopropoxide / CH2Cl2; 2,2,4-trimethyl-pentane / 5 h / -20 °C View Scheme