The mechanism of the tertiary amine catalysed isomerisation of endoperoxides to hydroxyketones: synthesis and chemistry of the intermediate postulated in the peroxide attack mechanism
摘要:
Evidence is presented which demonstrates that the Kornblum-DeLaMare rearrangement does not proceed via nucleophilic attack of the peroxide linkage. (C) 2002 Elsevier Science Ltd. All rights reserved.
Singlet oxygen generation from poly[4-diacetoxyiodo]styrene and hydrogen peroxide
作者:Mustafa ÇATIR
DOI:10.3906/kim-1602-13
日期:——
generates singletmolecular oxygen ($^1}$O$_2})$. Singlet oxygen generation was proved by trapping with typical organic compounds such as conjugateddienes, aromatic dienes, and electron-rich alkene. When compared to monomer analogue, the use of PDAIS in peroxidation of substrates gave slightly better yields (45%-96%). Regeneration and reuse of PDAIS showed similar activity. The mechanism underlying
用聚合物负载的高价碘化合物聚[4-二乙酰氧基碘]苯乙烯(PDAIS)处理过氧化氢,会生成单重态分子氧($ ^ 1} $ O $ _ 2})$。通过捕获典型的有机化合物(例如共轭二烯,芳族二烯和富含电子的烯烃)证明了单线态氧的产生。与单体类似物相比,在底物的过氧化中使用PDAIS的收率略高(45%-96%)。PDAIS的再生和再利用显示出相似的活性。研究了单线态氧的产生机理和反应范围。
Ring-Opening Metathesis Polymer Sphere-Supported <i>s</i><i>eco</i>-Porphyrazines: Efficient and Recyclable Photooxygenation Catalysts
作者:Matthew J. Fuchter、Brian M. Hoffman、Anthony G. M. Barrett
DOI:10.1021/jo052156t
日期:2006.1.1
subsequently converted into its zinc seco-derivative. Polymerization gave the corresponding ROMPgel and ROMPsphere (ROMP = ring-opening metathesis polymer) reagents, the latter of which proved efficient as an immobilized catalyst for the sensitized production of singlet oxygen for the purification-minimized parallelsynthesis of endoperoxides and ene adducts.
Enantioselective Synthesis of γ-Hydroxyenones by Chiral Base-Catalyzed Kornblum DeLaMare Rearrangement
作者:Steven T. Staben、Xin Linghu、F. Dean Toste
DOI:10.1021/ja065464x
日期:2006.10.1
A cinchona-alkaloid catalyzed asymmetric Kornblum DeLaMare rearrangement has been developed. Thus, enantioenriched 4-hydroxyenones are prepared from dienes by a two-step sequence involving photochemical dioxygenation and chiral base-catalyzed desymmetrization of the resulting endoperoxides.
Photocatalytic Properties of a Palladium Metallosquare with Encapsulated Fullerenes via Singlet Oxygen Generation
作者:Víctor Martínez-Agramunt、Eduardo Peris
DOI:10.1021/acs.inorgchem.9b02097
日期:2019.9.3
organic synthesis and biological studies. However, the photosensitizers that are required for singlet oxygen generation remain inadequate due to their often low thermal and photochemical stabilities. Here we describe the use of a palladium-conjoined metallosquare with encapsulated fullerenes (C60 or C70), which behaves as an efficient and photochemicallystable singlet oxygen photosensitizer. The metallocage