Disclosed is a compound represented by formula (1) or a pharmacologically acceptable salt thereof (In the formula, A represents a group that is represented by formula (A-1); R
1a
and R
1b
may be the same or different and each independently represents a C
1-6
alkyl group which may be substituted by one to three halogen atoms; m and n each independently represents an integer of 0-5; X
1
represents a hydroxyl group or an aminocarbonyl group; Z
1
represents a single bond or the like; and R
2
represents an optionally substituted C
1-6
alkyl group, an optionally substituted C
6-10
aryl group or the like.)
Regioselective Preparation of 3-Alkoxy-4,5-difluoroanilines by S<sub>N</sub>Ar
作者:Sven Van Brandt、Frederik J. R. Rombouts、Carolina Martínez-Lamenca、Jos Leenaerts、Tom R. M. Rauws、Andrés A. Trabanco
DOI:10.1002/ejoc.201201228
日期:2012.12
A simple and scalable procedure to introduce alcohols selectively at the 3-position of 3,4,5-trifluoroaniline is described. The procedure uses powdered NaOH as base and catalytic 15-crown-5 in refluxing toluene with a Dean–Stark trap. A short exploration of other nucleophiles and fluoroaryl electrophiles is also described.
The invention relates to bimesogenic compounds of formula (I): R
1
-MG-X-Sp-X
2
-MG-R
2
wherein R
1
, R
2
, MG
1
, MG
2
, X
1
, X
2
and Sp have the meaning given in claim
1,
to the use of bimesogenic compounds of formula (I) in liquid crystal media and devices, in particular in flexoelectric liquid crystal devices, to liquid crystal media and devices, in particular flexoelectric devices, comprising bimesogenic compounds of formula (I) and to improvements in flexoelectric devices.
A compound having GPR52 agonist activity or a salt thereof is provided.
The compound can be provided as a preventive/therapeutic agent for schizophrenia or the like. The compound is represented by the following formula:
wherein
A represents —CONR
a
— or —NR
a
CO—,
R
a
represents a hydrogen atom or the like,
B represents a hydrogen atom or the like,
a ring Cy1 represents a six-membered aromatic ring which may have one or more substituents in addition to a group represented by -A-B,
a ring Cy2 represents a six-membered ring which may be substituted with a halogen atom or the like,
a ring Cy3 represents a five- or six-membered ring which may have one or more substituents;
X represents C
1-2
alkylene or the like,
m represents an integer of 0 to 2, and
a ring Cy4 represents a six-membered aromatic ring which may have one or more substituents.