The Zirconium Alkoxide-Catalyzed Aldol-Tishchenko Reaction of Ketone Aldols
作者:Christoph Schneider、Markus Hansch、Timo Weide
DOI:10.1002/chem.200400951
日期:2005.1
Evaluation of a broad range of metal alkoxides as catalysts and optimization of the reaction protocol led to a modified zirconium alkoxide catalyst with attenuated Lewis acidity and dichloromethane as solvent, which resulted in suppression of the undesired acyl migration to a large extent. Various ketone aldols have been prepared and subjected to the general process, giving rise to a broad range of differently
PIPERIDINE DERIVATIVE, LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE
申请人:JNC CORPORATION
公开号:US20160090534A1
公开(公告)日:2016-03-31
To provide a compound having an effect for preventing photolysis of a liquid crystal composition, and having a high solubility in the liquid crystal composition, a liquid crystal composition containing the compound, and a liquid crystal display device including the composition. The compound is represented by formula (1), a liquid crystal composition contains the compound, and a liquid crystal display device includes the composition:
M(Z-Q)
a
(R
b
)
b
(1)
wherein, in formula (1), a is 1 to 4, and b is a numerical value: (4−a); M is an organic group; Z is a single bond or the like; and Q is a monovalent group represented by formula (Q-1), (Q-2) or (Q-3), in which R
a
and R
b
are hydrogen, alkyl or the like.