Molybdenum chloride catalysts for Z-selective olefin metathesis reactions
作者:Ming Joo Koh、Thach T. Nguyen、Jonathan K. Lam、Sebastian Torker、Jakub Hyvl、Richard R. Schrock、Amir H. Hoveyda
DOI:10.1038/nature21043
日期:2017.2
and ruthenium has led to reactivity and selectivity levels that were previously inaccessible. Here we show that molybdenum monoaryloxide chloride complexes furnish higher-energy (Z) isomers of trifluoromethyl-substituted alkenes through cross-metathesis reactions with the commercially available, inexpensive and typically inert Z-1,1,1,4,4,4-hexafluoro-2-butene. Furthermore, otherwise inefficient and
催化剂控制的立体选择性烯烃复分解过程的发展一直是化学领域的一项关键进展。在基于钼、钨和钌的配合物中掺入适当的配体导致了以前无法达到的反应性和选择性水平。在这里,我们表明,钼单芳氧基氯化物配合物通过与市售、廉价且通常惰性的 Z-1,1,1,4,4,4-六氟化合物的交叉复分解反应提供三氟甲基取代烯烃的高能 (Z) 异构体。 -2-丁烯。此外,用 Z-1,2-二氯乙烯和 1,2-二溴乙烯进行的低效和非立体选择性转化可以以显着提高的效率和 Z 选择性实现。使用这种钼单芳氧基氯化物复合物能够合成具有代表性的生物活性分子和医药相关化合物的三氟甲基类似物。在密度泛函理论计算的帮助下阐明了所观察到的活性和选择性水平的起源,这与先前提出的原则相矛盾。
Synthesis of CF<sub>3</sub>-Substituted Olefins by Julia-Kocienski Olefination Using 2-[(2,2,2-Trifluoroethyl)sulfonyl]benzo[<i>d</i>]thiazole as Trifluoromethylation Agent
作者:Andreas Hafner、Tobias S. Fischer、Stefan Bräse
DOI:10.1002/ejoc.201301070
日期:2013.12
A modified Julia–Kocienski protocol was investigated for the synthesis of CF3-substituted terminal olefins. By employing a simple one-step procedure, aldehydes were converted into the corresponding CF3-substitutedolefinsusing2-[(2,2,2-trifluoroethyl)sulfonyl]benzo[d]thiazole as the trifluoromethylationagent. This sulfone was prepared on a gram scale in two steps from inexpensive and commercially
USE OF COMPOSITIONS COMPRISING POLYMERIC INERT BINDERS FOR THE FABRICAITON OF LIGHT-EMITTING DIODE
申请人:Merck Patent GmbH
公开号:EP2725632A1
公开(公告)日:2014-04-30
The present invention relates to novel compositions comprising light emitting materials and/or charge transport materials and a polymeric binder, to their use as conducting inks for the preparation of organic light emitting diode (OLED) devices, to methods for preparing OLED devices using the novel formulations, and to OLED devices prepared from such methods and formulations.
Composition and method for preparation of organic electronic devices
申请人:Merck Patent GmbH
公开号:US10256408B2
公开(公告)日:2019-04-09
The present invention relates to novel compositions comprising an organic semiconductor (OSC) and one or more organic solvents. The composition is solid at a temperature of 25° C. and fluid at a higher temperature and the boiling point of the solvent is at most 400° C. Furthermore, the present invention describes the use of these compositions as inks for the preparation of organic electronic (OE) devices, especially organic photovoltaic (OPV) cells and OLED devices, to methods for preparing OE devices using the novel compositions, and to OE devices, OLED devices and OPV cells prepared from such methods and compositions.