FeSO4/CuCl2 yielded 1-(1-chlorocyclohexyl)ethanone as the major product consistent with 6-endo-trig cyclization of the intermediate 5-acetylhex-5-enyl radical. This strategy was extended to the ring enlargement of a series of 1-isopropenylcycloalkyl hydroperoxides. Regioselective 7- or 8-endo-trig cyclizationreactions could be achieved by treatment of the corresponding cyclopentyl or cyclohexyl hydroperoxides
Contra-Thermodynamic Positional Isomerization of Olefins
作者:Kuo Zhao、Robert R. Knowles
DOI:10.1021/jacs.1c11681
日期:2022.1.12
affords an isomerized and less thermodynamically stable alkene product. The higher oxidation potential of the less substituted olefin isomer renders it inert to further oxidation by the excited-state oxidant, enabling it to accumulate in solution over the course of the reaction. A broad range of isopropylidene substrates are accommodated, including enol ethers, enamides, styrenes, 1,3-dienes, and tetrasubstituted
Chemical source of singlet oxygen, or its synthetic equivalent. Generation from resin-bound peroxomolybdate
作者:Ernest C McGoran、Mark Wyborney
DOI:10.1016/s0040-4039(01)80612-2
日期:1989.1
Singletoxygen, or its synthetic equivalent, is generated by the action of resin-bound molybdate on hydrogen peroxide. Resin-bound peroxomolybdate converts reactant olefins to their ene, [4+2] and [2+2] cycloaddition or secondary products.
Aerobic epoxidation of hindered olefins and enol ethers catalyzed by a polymerizable β-ketoesterate complex of iron(III)
作者:Luigi Lopez、Piero Mastrorilli、Giuseppe Mele、Cosimo F. Nobile
DOI:10.1016/s0040-4039(00)73259-x
日期:1994.5
Peculiar hindered olefins and derivatives have been epoxidized, under Mukaiyama's conditions, using iron(III) catalytic centres. The experimental results allow to rule out the involvement of singlet oxygen and free peroxyacids as active species.
Electron-transfer reactions of hindered olefins induced by aminium salts.
作者:Luigi Lopez、Luigino Troisi、Giuseppe Mele
DOI:10.1016/s0040-4039(00)71233-0
日期:1991.1
Hinderedolefins 1–6, by reaction with aminium salts, can afford, in relations to the reaction conditions and the peculiar features of the reagents, different reaction products such as dioxetanes, epoxides, ketones, or homoallylic, allylic and vinylic halogenated derivatives.