Fluorobenziodoxole−BF
<sub>3</sub>
Reagent for Iodo(III)etherification of Alkynes in Ethereal Solvent
作者:Jinkui Chai、Wei Ding、Junliang Wu、Naohiko Yoshikai
DOI:10.1002/asia.202000653
日期:2020.7.16
reaction tolerates a variety of functionalized internal and terminal alkynes to afford trans‐β‐alkoxyvinylbenziodoxoles, which represent versatile precursors to stereochemically well‐defined multisubstituted vinyl ethers. The reaction is proposed to involve cleavage of the I−F bond of FBX by BF3, followed by electrophilic activation of the alkyne by the resulting cationic IIII species that triggers the
fluorobenziodoxole(FBX)的组合和BF 3 ⋅OET 2在环戊基甲基醚促进区域选择性和立体选择性加成benziodoxole和甲氧基与炔烃。这种双官能化反应可耐受各种官能化的内部和末端炔烃,以提供反式-β-烷氧基乙烯基苯并恶唑,这是立体化学定义明确的多取代乙烯基醚的多用途前体。提出该反应涉及通过BF 3裂解FBX的IF键,然后通过生成的阳离子I III物种引发炔的亲电活化,从而触发醚氧的亲核加成。