Alkene Difunctionalization Triggered by a Stabilized Allenyl Radical: Concomitant Installation of Two Unsaturated C−C Bonds
作者:Yunlong Wei、Hong Zhang、Xinxin Wu、Chen Zhu
DOI:10.1002/anie.202106145
日期:2021.9.6
Radical-mediated difunctionalization of alkenes provides a promising approach to introduce one alkenyl or alkynyl group to target compounds. However, simultaneous installation of two unsaturated C−C bonds via alkene difunctionalization remains elusive, attributable to the high instability and transient lifetimes of alkenyl and alkynyl radicals. Herein, we report the photocatalytic 1,2-alkynylalkenylation and
Alkenesulfonyl chlorides reacted with vinylarenes in the presence of a catalytic amount of dichlorotris(triphenylphosphine)ruthenium(II) to give substituted 1:1 adducts, which were dehydrochlorinated and desulfonylated successively to form substituted (E,E)-1,3-dienes in good yield.
在催化量的二氯三(三苯基膦)钌 (II) 存在下,烯磺酰氯与乙烯基芳烃反应生成取代的 1:1 加合物,这些加合物依次脱氯化氢和脱磺酰化生成取代的 (E,E)-1,3-二烯良好的产量。
A novel route to unsymmetrical stilbene derivatives via intramolecular free radical ipso substitution reactions
作者:Christopher R.A. Godfrey、Philip Hegarty、William B. Motherwell、Muhammed K. Uddin
DOI:10.1016/s0040-4039(97)10645-1
日期:1998.2
Unsymmetrical stilbene derivatives can be prepared via intramolecular free radical ipso substitution reactions using suitably constituted vinyl sulfonate and sulfonamide tethering chains.