N-Heterocyclic Carbene-Catalyzed Construction of 1,3,5-Trisubstituted Benzenes from Bromoenals and α-Cyano-β-methylenones
作者:Chun-Lin Zhang、Song Ye
DOI:10.1021/acs.orglett.6b03306
日期:2016.12.16
A direct and efficient approach to 1,3,5-trisubstituted benzenes has been developed via N-heterocycliccarbene-catalyzed [2 + 4] annulation of α-bromoenals and α-cyano-β-methylenones. The reaction worked well for both aryl- and alkylenones.
The I2-catalyzed cyclization reaction of chalcones and 2-aryl propionaldehydes or isobutyraldehyde has been developed for the synthesis of 1,3,5-triarylbenzenes and 2,3-dihydrobenzofuran derivatives. This reaction tolerates a wide range of functional groups. Moreover, this method features an inexpensive catalyst and available starting materials.
LIQUID CRYSTAL DISPLAY DEVICE AND METHOD OF MANUFACTURING THE SAME
申请人:Sony Corporation
公开号:US20130155360A1
公开(公告)日:2013-06-20
A liquid crystal display device includes a liquid crystal display element including a pair of alignment films provided on opposing face sides of a pair of substrates, and a liquid crystal layer including liquid crystal molecules with negative dielectric constant anisotropy provided between the pair of alignment films, wherein at least one of the pair of alignment films includes a compound in which a polymer compound including a cross-linkable functional group as a side chain is cross-linked, a pretilt is conferred on the liquid crystal molecules by the cross-linked compound, and at least one type of a compound represented by the following General Formula 101 or General Formula 102 is included in the liquid crystal layer.
CH
(4-n)
(R
1
)
n
(101)
(R
2
)
m
-A-(X)
p
(102)