Substitution Reactions of Silylated Allyl or Benzyl Alcohols

C-Substitution Reactions of Silylated Allyl or Benzyl Alcohols 

Trimethylsilylated allylic alcohols such as 804 react readily with allyltrimethyl-silane 82 in the presence of ZnCl2 in CH2CI2 to give, after 1.5 h at 25 °C, an approximately ca. 22 78 mixture of 805 and 806 in 94% yield, and HMDSO 7 [17]. 

Conversion of Ethers and Ketals into Iodides, Bromides, Chlorides, and a-lodo Ethers 

MegSil 17 Me3SiO(CH2)gOSiMe3+ MOgSiOiCHjj SiMeg + Me3SiOSiMe3 7 

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