A versatile iodo(iii)etherification of terminal ethynylsilanes using BF3–OiPr2 and alkyl benzyl ethers

Abstract

A series of (E)-α-silyl-β-alkoxyvinyl-λ³-iodanes was synthesized from iodosylbenzene, BF₃–ether complexes, and terminal ethynylsilanes. The combined use of BF₃–OⁱPr₂ and benzyl ethers of primary alcohols (ROBn) allows the chemoselective transfer of primary alkoxy groups (RO) onto the β-position of the terminal ethynylsilanes.