[2,3]-Wittig Rearrangement Initiated by 1,5-Hydrogen Atom Transfer from an<i>o</i>-Iodophenyl Group on the<i>α</i>-Carbon of Allylic Ethers by Reduction with SmI<sub>2</sub>
作者:Munetaka Kunishima、Kazuhito Hioki、Daisuke Nakata、Shigenobu Nogawa、Shohei Tani
DOI:10.1246/cl.1999.683
日期:1999.7
generated by reduction of an o-iodophenyl group on the allylic position of allyl ethers by SmI2 regioselectively generates α-allyloxy carbanions, which undergo [2,3]-Wittig rearrangement to afford a substituted 4-phenyl-3-buten-1-ol. The effect of HMPA concentration on distribution of the 1,5-hydrogen transfer giving Wittig rearranged products and hydrogen abstraction giving reductive deiodination