Direct Cobalt-Catalyzed Cross-Coupling Between Aryl and Alkyl Halides
作者:Axel Jacobi von Wangelin、Waldemar Czaplik、Matthias Mayer
DOI:10.1055/s-0029-1218012
日期:2009.11
An operationally simple cross-coupling reaction between aryl halides and alkylhalides with high selectivity has been developed. The underlying domino process utilizes CoCl 2 /Me 4 -DACH as a catalyst system. The methodology exhibits high sustainability as it obviates the need for the pre-formation and handling of stoichiometric amounts of hazardous Grignard compounds.
The present invention relates to liquid-crystalline media comprising one or more compounds of formula T
as defined in claim 1, and to high-frequency components comprising these media, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, tunable filters, tunable metamaterial structures, and electronic beam steering antennas, e.g. phased array antennas.
本发明涉及由一种或多种式 T 化合物组成的液晶介质。
的液晶介质,以及由这些介质组成的高频元件,特别是用于高频设备的微波元件,如微波相位移动装置、可调滤波器、可调超材料结构和电子波束转向天线,如相控阵天线。
Liquid-crystalline medium
申请人:Merck Patent GmbH
公开号:US10711195B2
公开(公告)日:2020-07-14
The present invention relates to liquid crystal mixtures comprising one or more compounds of the formula A
and, in addition one or more compounds of formula I
or one or more compounds of formula II
wherein the individual radicals have the respective meanings indicated in claim 1, to the use thereof for high-frequency components, and to high-frequency components, in particular antennae, especially for the gigahertz range, comprising these media.
本发明涉及由一种或多种式 A 化合物组成的液晶混合物
以及一种或多种式 I 化合物的液晶混合物
或一种或多种式 II 的化合物
其中各个基团具有权利要求 1 中所述的含义,用于高频元件,以及包括这些介质的高频元件,特别是天线,尤其是千兆赫范围的天线。
LIQUID-CRYSTALLINE MEDIA, COMPONENTS FOR HIGH-FREQUENCY TECHNOLOGY, AND MESOGENIC COMPOUNDS
申请人:Merck Patent GmbH
公开号:EP2935513B1
公开(公告)日:2018-03-07
CYANOPYRIMIDINE DERIVATIVES SUITABLE AS COMPONENTS IN LIQUID CRYSTAL MEDIA