Herein, a practical and straightforward access to fluorinated homoallylicalcohols is reported. The corresponding products were obtained in good to excellent yield in brine or THF as a solvent using indium(0) and the readily available 3-chloro-2-fluoroprop-1-ene to promote the allylation reaction. This methodology affords an easy access to valuable fluorinated products under mild conditions.
A new protocol for the anti-Markovnikovhydrofunctionalization of alkenyl alcohol O-Bn ethers was developed using xanthates as functionalizing agents in the presence of lauroyl peroxide as a radical initiator and a stoichiometric oxidant. The benzylgroup serves as a tracelesshydrogendonor in the remote radical hydrogen atom transfer event during the process.
Efficient access to fluorinated homoallylic alcohols through an indium promoted fluoroallylation reaction
作者:Gérald Lemonnier、Nathalie Van Hijfte、Muriel Sebban、Thomas Poisson、Samuel Couve-Bonnaire、Xavier Pannecoucke
DOI:10.1016/j.tet.2014.03.067
日期:2014.5
Herein, an efficient access to fluorinated homoallylic alcohol is reported. The fluorinated alcohols were obtained in good to excellent yield using indium and halo-fluorinated allylic derivatives. The developed methodology using gamma-substituted halo-fluorinated allylic derivatives gave the corresponding alpha-substituted fluorinated homoallylic alcohol in good yields and good diastereoselectivities up to 86:14. (C) 2014 Elsevier Ltd. All rights reserved.