in pyridine 12 h; Ambient temperature;

1: 1) 5 N aq. NaOH / 1) DMSO, 15 min, 10 deg C, 2) DMSO, 1 h, r.t. 2: 49 percent / (Bu3Sn)2O, polyhydrogenmethylsiloxane / toluene / 4 h / 100 °C View Scheme

di-tert-butyl peroxide; triisopropylsilanethiol in chlorobenzene Heating; Further byproducts.;