Amine Synthesis through Mild Catalytic Hydrosilylation of Imines using Polymethylhydroxysiloxane and [RuCl2(arene)]2 Catalysts
作者:Bin Li、Jean-Baptiste Sortais、Christophe Darcel、Pierre H. Dixneuf
DOI:10.1002/cssc.201100585
日期:2012.2.13
Tolerate silicone! The stable [RuCl2(p‐cymene]2 complex is an efficient catalyst for the direct chemoselective hydrosilylation of functionalized aldimines and ketimines into amines, usingpolymethylhydroxysiloxane as an inexpensive, stable, and safe hydrosilane source. The catalysis operates in ethanol, under air at room temperature, and tolerates the ketone ester and alkene functionality.
A Highly Efficient Base-Metal Catalyst: Chemoselective Reduction of Imines to Amines Using An Abnormal-NHC–Fe(0) Complex
作者:Mrinal Bhunia、Pradip Kumar Hota、Gonela Vijaykumar、Debashis Adhikari、Swadhin K. Mandal
DOI:10.1021/acs.organomet.6b00478
日期:2016.9.12
A base-metal, Fe(0)-catalyzed hydrosilylation of imines to obtain amines is reported here which outperforms its noble-metal congeners with the highest TON of 17000. The catalyst, (aNHC)Fe(CO)(4), works under very mild conditions, with extremely low catalyst loading (down to 0.005 mol %), and exhibits excellent chemoselectivity. The facile nature of the imine reduction under mild conditions has been further demonstrated by reducing imines towards expensive commercial amines and biologically important N-alkylated sugars, which are difficult to achieve otherwise. A mechanistic pathway and the source of chemoselectivity for imine hydrosilylation have been proposed on the basis of the well-defined catalyst and isolable intermediates along the catalytic cycle.
Catalytic C–H bond arylation of aryl imines and oxazolines in water with ruthenium(II)-acetate catalyst
作者:Bin Li、Karthik Devaraj、Christophe Darcel、Pierre H. Dixneuf
DOI:10.1016/j.tet.2012.03.117
日期:2012.7
Ruthenium(II)-acetate catalyzed C-H bond activation/diarylations of aryl-aldimines, aryl-ketimines and phenyl-oxazolines with aryl bromides in water are reported. Water strongly favours the catalytic diarylation of aryl-ketimines and phenyl-oxazolines with respect to organic solvent. CD (C) 2012 Elsevier Ltd. All rights reserved.
Liquid Crystal and Liquid Crystal Display
申请人:Watanabe Junji
公开号:US20100155663A1
公开(公告)日:2010-06-24
A novel liquid crystal comprising a first liquid compound having bent structures and a second liquid crystal compound. A liquid crystal phase formed by the first liquid crystal compound exhibits ferroelectricity or antiferroelectricity while a liquid crystal phase formed by the second liquid crystal compound exhibits neither ferroelectricity nor antiferroelectricity. A smectic liquid crystal phase formed by the first liquid crystal compound has a tilted structure while a smectic liquid crystal phase formed by the second liquid crystal compound has no tilted structure. The first liquid crystal compound is represented by the following chemical formula (m=16) and the second liquid crystal compound is represented by the following chemical formula (m=4),