Aldehyde/olefin cooxidations: Parallel epoxidation pathways and concerted decomposition of the peroxyacyl-olefin adduct
作者:Kevin R. Lassila、Francis J. Waller、Steven E. Werkheiser、Amy L. Wressell
DOI:10.1016/0040-4039(94)88247-9
日期:1994.10
Aldehyde-mediated olefinepoxidations appear to proceed by parallel peracid and radical addition pathways. For that portion of the reaction proceeding by radical addition, several lines of evidence favor an explanation in which the peroxyacyl-olefinadductdecomposes in a concerted manner to form alkyl radical, CO2, and epoxide.
The oxidation of organic compounds with iodosylbenzene catalysed by tetra(4-N-methylpyridyl)porphyrinatoiron(III) pentacation: a polar model system for the cytochrome P450 dependent mono-oxygenases
作者:John R. Lindsay Smith、David N. Mortimer
DOI:10.1039/c39850000410
日期:——
Replacing the tetraphenylporphyrinatoiron(III) chloride (FeIIITPPCl) catalyst, in Groves' modelsystem (FeIIITPPCl–PhIO) for cytochromeP450mono-oxygenases, with tetra(4-N-methylpyridyl)porphyrinatoiron(III) pentacation allows oxidations to be carried out in protic and dipolar solvents aprotic solvents without significantly altering the mechanisms of the reactions.
在格罗夫斯的模型系统(Fe III TPPCl–PhIO)中,用四(4- N-甲基吡啶基)卟啉铁(III)五价取代四烷基卟啉铁(III)氯化物(Fe III TPPCl–PhIO)催化剂。可以在质子和偶极溶剂中进行,也可以在非质子溶剂中进行,而不会明显改变反应机理。
Regioselective Carbonylation of <i>trans</i>-Disubstituted Epoxides to β-Lactones: A Viable Entry into <i>syn</i>-Aldol-Type Products
作者:Michael Mulzer、Bryan T. Whiting、Geoffrey W. Coates
DOI:10.1021/ja405151n
日期:2013.7.31
reported for the regioselective carbonylation of trans-disubstituted epoxides to cis-β-lactones. The two catalysts display high and opposing selectivities, which generally are difficult to achieve for this class of epoxides. The resulting β-lactones are well-defined precursors for a wide variety of aldol-type compounds. Altogether, carbonylation of disubstituted epoxides is established as a viable and
Alkene epoxidation with iodosylbenzene catalysed by polyionic manganese porphyrins electrostatically bound to counter-charged supports
作者:Herica C. Sacco、Yassuko Iamamoto、John R. Lindsay Smith
DOI:10.1039/b006755p
日期:——
Manganese(III) complexes of tetra-anionic and tetra-cationic porphyrins have been immobilised on counter-charged, surface-modified silica supports and on organic ion-exchange resins. The reactions of these supported manganese(III) porphyrin systems and analogous uncharged homogeneous systems have been examined using cyclooctene and (E)- and (Z)-4-methylpent-2-ene epoxidations, with iodosylbenzene (PhIO)
REACTION OF OXIRANES WITH DIANION OF METHYL ACETOACETATE IN THE PRESENCE OF BORON TRIFLUORIDE ETHERATE
作者:Masahiko Yamaguchi、Ichiro Hirao
DOI:10.1246/cl.1985.337
日期:1985.3.5
Oxiranes were reacted with dianion of methyl acetoacetate in the presence of borontrifluoride etherate to give the substituted tetrahydro-2-furylideneacetates, which were further converted to γ-lactones.