Manganese(III)-Mediated Selective Diphenylphosphinoyl Radical Reaction of 1,4-Diaryl-1-butynes for the Synthesis of 2-Phosphinoylated 3,4-Dihydronaphathalenes
A diphenylphosphinoyl radical-initiated sequential reaction of 1,4-diaryl-1-butynes and analogues is developed for the synthesis of 2-phosphinoylated 3,4-dihydronaphathalenes and related compounds.
Metal‐Free Synthesis of Selenodihydronaphthalenes by Selenoxide‐Mediated Electrophilic Cyclization of Alkynes
作者:Shaoyu An、Zhong Zhang、Pingfan Li
DOI:10.1002/ejoc.202100423
日期:2021.6.7
A metal-free, one-pot selenium mediated electrophiliccyclization reaction of alkynes and triflic anhydride-activated selenoxides was realized, giving selenium containing dihydronaphthalene products, including selenium-substituted phenanthrene, dihydroquinoline, 2H-chromene, and coumarin.
Recyclable heterogeneous metal foil-catalyzed cyclopropenation of alkynes and diazoacetates under solvent-free mechanochemical reaction conditions
作者:Longrui Chen、Devonna Leslie、Michael G. Coleman、James Mack
DOI:10.1039/c8sc00443a
日期:——
cyclopropenation of terminal and internal alkynes under mechanochemical reactionconditions. This methodology enables the functionalization of a wide range of terminal or internal alkynes under ambient, aerobic, and solvent-freeconditions. Finally, we have demonstrated a unique and versatile one-pot domino Sonogashira-cyclopropenation mechanochemical reaction for the formation of complex cyclopropenes.
The alkoxylradical is an important reactive intermediate in mechanistic studies and organic synthesis; however, its current generation fromalcohol oxidation heavily relies on transition metal activation under strong oxidative conditions. Here we report the first visible-light-induced alcohol oxidation to generate alkoxylradicals by cyclic iodine(III) reagent catalysis under mild reaction conditions
Investigations of alkynylbenziodoxole derivatives for radical alkynylations in photoredox catalysis
作者:Yue Pan、Kunfang Jia、Yali Chen、Yiyun Chen
DOI:10.3762/bjoc.14.103
日期:——
alkynylation reactivity for the first time. A series of mechanistic experiments were conducted to study the radical acceptor and oxidative quencher reactivity of alkynylbenziodoxoles, in which unsubstituted alkynylbenziodoxoles played balancing roles in both processes, while electron-rich benziodoxole derivatives demonstrate synthetic advantages in some cases.