- INHIBITORS OF CYSTATHIONINE BETA SYNTHASE TO REDUCE THE NEUROTOXIC OVERPRODUCTION OF ENDOGENOUS HYDROGEN SULFIDE
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The invention is directed to inhibitors of cystathionine beta synthase which, among other biochemical effects, allow reduction of the neurotoxic overproduction of endogenous hydrogen sulphide. These compounds and pharmaceutical compositions containing them are useful for the prevention and treatment of cognitive disorders such as cognitive disorders in Down syndrome. The invention also relates to methods for preventing or treating cognitive disorders including cognitive disorders in Down Syndrome.
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Page/Page column 39
(2013/05/23)
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- Red-emitting dyes with photophysical and photochemical properties controlled by pH
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New unsymmetrical zinc azaphthalocyanines, bearing one substituted aniline as a peripheral substituent, were prepared by using a statistical condensation approach. Both fluorescence and singlet oxygen quantum yields were extremely low in DMF (φFΔF=0. 22-0.29, φΔ=0.40-0.59, respectively). This behavior was attributed to the deactivation of excited states by intramolecular charge transfer from a donor site (aniline), which was blocked after protonation in acidic media. In the protonated form, all of the compounds efficiently emitted light with λem in the region of 662-675 nm. The investigated compounds were anchored to dioleoylphosphatidylcholine (DOPC) unilamellar vesicles and showed response to buffer pH. They were highly fluorescent at low pH values and almost nonfluorescent in neutral solutions. The pKa values were determined in DOPC vesicles and ranged between 2.2 and 4.2.
- Novakova, Veronika,Miletin, Miroslav,Kopecky, Kamil,Zimcik, Petr
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scheme or table
p. 14273 - 14282
(2012/01/06)
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- A new family of bis-DCM based dopants for red OLEDs
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We have synthesized a series of novel bis-DCM derivatives as candidate red dopants for use in organic light-emitting devices (OLEDs), by introducing various donor-substituted aryl rings. Compared to DCJTB (621 nm), the novel dopants (637-677 nm) showed more red-shifted emission in 1,2-dichloroethane. Using bis-DCMNEtOBu (7) as a dopant, we fabricated OLEDs with the configuration of ITO/4,4′,4″-tris(3-methylphenylammo)triphenylamine (m-MTDATA) (20 nm)/N,N′-bis(1-naphthyl)-diphenyl-1,1′-biphenyl-4,4′-diamine (NPB) (40 nm)/tris(8-quinolinolato)aluminium (Alq3) : red dopant (35 nm, x wt%)/Alq3 (35 nm) LiF/Al. The device with a doping concentration of 1.25 wt% showed pure red emission at λmax = 654 nm (chromaticity coordinate: x = 0.67, y = 0.33) and a maximum brightness of 2500 cd m-2. The chromaticity coordinates were almost independent of current density. Moreover, highly efficient red emission (x = 0.63, y = 0.36) was obtained in the 0.74 wt% doped device. The maximum external quantum efficiency was 4.46% at 7 V, the current efficiency was 3.43 cd A-1, and the power efficiency was 1.64 Im W-1. The highest brightness of 8300 cd m-2 was obtained at 19.6 V. The Royal Society of Chemistry 2005.
- Jung, Byung-Jun,Lee, Jeong-Ik,Chu, Hye Yong,Do, Lee-Mi,Lee, Jaemin,Shim, Hong-Ku
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p. 2470 - 2475
(2007/10/03)
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- Red organic electroluminescent compounds, method for synthesizing the same and electroluminescent devices
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Red organic electroluminescent compounds containing bis-condensed DCM derivatives, a method for synthesizing the same and an organic electroluminescent device using the same. The red organic electroluminescent compound having the formula: wherein R1, R1', R2 and R2' are independently hydrogen atom, or C1-C30 alkyl, aryl or hetero ring; R3, R3', R4 and R4' are independently hydrogen atom, C1-C10 alkyl or alkoxy; one or more pairs selected from the group consisting of R1 and R3, R1' and R3', R2 and R4, and R2' and R4' can be connected in forms of -R1-R3-, -R1'-R3'-, -R2-R4-, and -R2'-R4'-; R5, R5', R6 and R6' are independently hydrogen atom, or C1-C30 alkyl, alkoxy or aryl; at least one of R3, R3', R4, R4', R5, R5', R6 and R6' is not hydrogen atom.
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- Bulk dyeing of plastics
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Bulk dyeing of plastics using dyestuffs of the formula (I) STR1 wherein n denotes 1 or 2, preferably 1, Ro for n=1, denotes aryl, hetaryl or heterocyclylidenemethyl, or for n=2, denotes a direct bond or arylene and the ring A is unsubstituted or substituted by C1 -C4 -alkyl, C5 -C8 -cycloalkyl, C6 -C10 -aryl, C1 -C4 -alkyloxy, C6 -C10 -aryloxy, C6 -C10 -aryl- or C1 -C4 -alkylsulphonyl, cyano, halogen, in particular chlorine or bromine, or a radical of the formula --COR1, wherein R1 represents C1 -C4 -alkoxy, amino, C1 -C4 -alkylamino, di-C1 -C4 -alkylamino, C6 -C10 -arylamino, C1 -C4 -alkyl or C6 -C10 -aryl, or contains a fused-on aromatic or cycloaliphatic ring, the plastics used being, in particular, thermoplastics, preferably vinyl polymers, polyesters or polyamides.
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- Non-linear optical material and non-linear optical devices
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A material comprising a compound of the formula (I) wherein R1 and R2 are the same or different and each is hydrogen, alkyl of 1 to 22 carbon atoms, hydroxyalkyl of 1 to 22 carbon atoms, haloalkyl of 1 to 22 carbon atoms or cyanoalkyl wherein the alkyl moiety contains from 1 to 22 carbon atoms or aryl of 6 to 10 carbon atoms; and R3, R4, R5, R6, R7, R8, R9 and R10 are the same or different and each is hydrogen, alkyl or alkoxyl of 1 to 10 carbon atoms, halogen, cyano, hydroxyl, alkoxycarbonyl of 2 to 22 carbon atoms or acyl of 2 to 22 carbon atoms, has a high non-linear optical coefficient and is suitable for use in a non-linear optical device.
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- 3-(substituted phenyl)phthalides
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Process comprises the combination of the three steps of condensing 3-N(R)2 -4-X-benzoic acid with an aromatic or heterocyclic aldehyde, Y-CHO, under acidic conditions to produce 3-Y-5-X-6-N(R)2 phthalide (II), condensing said phthalide with a compound of the formula Z-H under alkaline or acid conditions to produce 2-(α-Y-α-Z)methyl-4-X-5-N(R)2 benzoic acid (III), and oxidizing said benzoic acid to produce 3-Y-3-Z-5-X-6-N(R)2 phthalide (I) where: R is hydrogen, non-tertiary alkyl of one to four carbon atoms, benzyl or substituted benzyl; X is hydrogen or halo; Y is 4-R1 -3-R2 -2-R1 -phenyl, 1-R5 -2-R6 -5/6-R4 -3-indolyl, 9-R7 -3-carbazolyl, 9-julolidinyl, 3,4-dioxymethylenephenyl, 2-thienyl, 1-R8 -2-pyrrolyl, or 4-pyridinyl; and Z is 4-R1 -3-R2 -2-R1 -phenyl, 1-R5 -2-R6 -5/6-R4 -3-indolyl or 1-R8 -2-pyrrolyl which are useful as colorless precursor color formers in carbonless duplicating and in thermal marking systems. The intermediates, 3-Y-5-X-6-N(R)2 phthalides (II) and 2-(α-Y-α-Z)methyl-4-X-5-N(R)2 benzoic acids (III) also have utility as colorless precursor color formers in carbonless duplicating and thermal marking systems.
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- Novel compounds, processes and marking systems
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Mono and bis substituted (arylsulfonyl)alkanes useful as color formers, particularly in carbonless duplicating and thermal marking systems, are prepared by the interaction of the appropriate aldehyde or dialdehyde with the appropriate aryl or heterocyclic moiety and the appropriate phenylsulfinic acid in the presence of a catalyst.
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