Thorpe-Ingold Effect in Branch-Selective Alkylation of Unactivated Aryl Fluorides
作者:Matthew J. O'Neill、Tim Riesebeck、Josep Cornella
DOI:10.1002/anie.201804479
日期:2018.7.16
Presented herein is a general protocol for the alkylation of simple aryl fluorides with unbiased secondary Grignard reagents by means of nickel catalysis. This study revealed a general Thorpe–Ingold effect in the ligand backbone which confers a high degree of selectivity for the secondary carbon center in the C−C coupling event. This protocol is characterized by mild reaction conditions, robustness
C–F Activation for C(sp<sup>2</sup>)–C(sp<sup>3</sup>) Cross-Coupling by a Secondary Phosphine Oxide (SPO)-Nickel Complex
作者:Valentin Müller、Debasish Ghorai、Lorena Capdevila、Antonis M. Messinis、Xavi Ribas、Lutz Ackermann
DOI:10.1021/acs.orglett.0c02609
日期:2020.9.4
A secondary phosphine oxide (SPO)-nickel catalyst allowed the activation of otherwise inert C–F bonds of unactivated arenes in terms of challenging couplings with primary and secondary alkyl Grignard reagents. The C–F activation is characterized by mild reaction conditions and high levels of branched selectivity. Electron-rich and electron-deficient arenes were suitable electrophiles for this transformation
Therapeutic agents, and methods of making and using the same
申请人:Sargent Bruce J.
公开号:US20100093705A1
公开(公告)日:2010-04-15
In part, the present invention is directed to antibacterial compounds.
部分地,本发明是针对抗菌化合物的。
LIQUID CRYSTAL COMPOSITION
申请人:Sumitomo Chemical Company, Limited
公开号:US20170335191A1
公开(公告)日:2017-11-23
A liquid crystal composition which prevents production of an alignment defect of a liquid crystal compound and also has excellent storage stability during dissolution in a solvent is provided. The liquid crystal composition is suitable for constituting a retardation film capable of favorable circular polarization conversion. The liquid crystal composition includes a polymerizable liquid crystal compound having 3 or more ring structures in the main chain, and aluminum. A content of the aluminum is 1 ppm or more and 170 ppm or less relative to the polymerizable liquid crystal compound.
A liquid crystal composition containing a polymerizable liquid crystal compound (A) having 5 or more ring structures in its main chain and a polymer (B) of the polymerizable liquid crystal compound (A) having 5 or more ring structures in its main chain, which inhibits occurrence of an orientation defect of a liquid crystal compound and exhibits excellent storage stability when dissolved in a solvent is provided.