1: 75 percent / t-BuLi / diethyl ether; tetrahydrofuran / -78 °C 2: 1.) thexylborane; 2.) 2M NaOH, 30percent H2O2 / 1.) THF, 0 deg C -> r.t., 8 h View Scheme

sodium hydroxide; thexylborane; dihydrogen peroxide 1.) THF, 0 deg C -> r.t., 8 h; Yield given. Multistep reaction;