Gold(I)-Catalyzed Reactions of Propargyl Esters with Vinyl Derivatives
作者:Christian A. Sperger、Jørn E. Tungen、Anne Fiksdahl
DOI:10.1002/ejoc.201100291
日期:2011.7
A gold-catalyzed olefin cyclopropanation reaction of propargyl esters with vinylester or vinyl sulfonamide derivatives was investigated for the synthesis of highly substituted cyclopropane derivatives in good diastereoselectivity. By varying the vinyl species, trans-cyclopentenyl esters were selectively formed by a formal [3+2] cycloaddition.
Mechanisms for Manganese(III) Oxidations with Alkenes
作者:William E. Fristad、John R. Peterson、Andreas B. Ernst、Gordon B. Urbi
DOI:10.1016/s0040-4020(01)87310-5
日期:1986.1
metal complexed organic radicals, and the importance of an oxo-centered manganese(III) triangle are discussed as they relate to the lactone annulation reaction. Single electron transfer oxidation of alkenes is described as a route toward 1,2-diacetates of alkenes within the 8.1-7.5 eV I.P. range. Three less common modes of Mn(III) reaction are discussed and compared with the two primary processes of
在乙酸锰(III)与羧酸和烯烃的反应中,已经鉴定出三个不同的过程,它们涉及烯烃和两个独立于烯烃的过程。通过产品研究,重排,稀释实验和文献动力学数据的组合,可以提出一个统一的机制图来描述这些过程。具体地,讨论了羧酸组分的α-H酸的作用,缺电子的自由基加成,金属络合的有机自由基以及以氧代为中心的锰(III)三角形的重要性,因为它们与内酯环化反应有关。烯烃的单电子转移氧化被描述为通往8.1-7.5 eV IP范围内的烯烃1,2-二乙酸酯的途径。
Chemistry of organo halogenic molecules. Part 100. Comparative behaviour of xenon diflouride and caesium fluoroxysulphate in the fluorination of enol acetates and ketones
Xenon difluoride and caesiumfluoroxysulphate reacted in methylene chloride or acetonitrile with various enol acetates, diketones, and ketones, yielding mainly α-fluoro ketones, the course of the reaction depending on the reagent and the structure of the organic molecule. Enol acetates from cycloakanones were converted with caesiumfluoroxysulphate to α-fluorocycloalkanones in high yield. Xenon difluoride
[EN] FULLERENE DERIVATIVES<br/>[FR] DÉRIVÉS DU FULLÉRÈNE
申请人:MERCK PATENT GMBH
公开号:WO2015192942A1
公开(公告)日:2015-12-23
The invention relates to fullerene derivatives of formula I, to mixtures and formulations containing them, to the use of the fullerene derivatives, mixtures and formulations as organic semiconductors in, or for the preparation of, electronic devices, especially organic photovoltaic (OPV) devices and organic photodetectors (OPD), and to electronic devices comprising, or being prepared from, these fullerene derivatives, mixtures or formulations.
Propylene polymer and composition containing the same, molded object and laminate comprising these, and processes for producing propylene polymer and composition containing the same
申请人:IDEMITSU KOSAN CO., LTD.
公开号:EP1772467A1
公开(公告)日:2007-04-11
A propylenic polymer according to the present invention or a composition thereof have an excellent melt flowability and contains a less amount of stickiness-causing components, and also has a low modulus and is pliable, and is capable of providing a transparent molded article, thus being useful as a substitute for a pliable vinyl chloride resin. In addition, a molded article made therefrom exhibits an excellent heat seal performance at a low temperature, and is excellent in terms of transparency and rigidity. Specifically, it has an isotactic pentad fraction (mmmm), which indicates a stereoregulariry, of 30 to 80 %, a molecular weight distribution (Mw/Mn) of 3.5 or less and an intrinsic viscosity [η] of 0.8 to 5 dl/g.