Procedure C for the Synthesis of Vinyl Silanes 4. Chloro(dimethyl)vinylsilane (1.1 equiv.) was added to a mixture of iodohydrin 3 (1.0 equiv.), 4-dimethylaminopyridine (0.2 equiv.) and Et3N (1.2 equiv.) in dry CH2Cl2 (0.1 M with respect to the iodohydrin) under Ar. The reaction mixture was stirred 20 min in the dark at room temperature. The reaction was quenched by slowly adding a few drops of isopropanol, and the mixture was reduced in vacuo. The residue was redissolved in water and extracted with Et2O (3 x 10 mL). The combined organic layers were washed with a saturated aqueous NaHCO3 solution and brine, dried over anhydrous Na2SO4, filtered and concentrated in vacuo. The crude was purified by column chromatography to afford the wanted vinyl silane.