Lactols and their ethers undergo smooth allylation with allyltrimethylsilane in the presence of 5 mol % iodine in dichloromethane at −78 °C to afford C-allylfuranosides in good yields and with high diastereoselectivity. The use of iodine makes this method simple, convenient and practical. This is the first report on the allylation of lactols with allyltrimethylsilane using molecular iodine as a catalyst
A highly stereoselective total synthesis of amphidinolide T1 is achieved using Sharpless asymmetric epoxidation, base-induced epoxide opening, radical cyclization, diastereoselective reduction followed by allylation, Evans methylation, base-induced reductive elimination, umpolung reaction, chemoselective oxidation, and regioselective macrolactonization.