bis(trimethylsilyl)-peroxide in diethyl ether 2 h; Ambient temperature;

1: 43 percent / tetrahydrofuran / -45 - -40 °C 2: 81 percent / Bu3SnH; AIBN / toluene / 12 h / 110 °C View Scheme

in tetrahydrofuran addn. of Bu3SnCl (room temp., N2) to soln. of Grignard reagent (from 1-bromocyclohexene and Mg in THF); mixt. refluxed for 2 h; cooled at 0°C, petroleum ether added, then satd. NH4Cl soln., sepn., drying, solvents removed, distn.;

in tetrahydrofuran 2 h; Ambient temperature;