Abstract:
The invention concerns a new class of tubulin polymerisation inhibitors and their applications in research and medicine, notably in chemotherapy. The invention proposes new azoaryl derivatives of formula (I): as defined in Claim 1, which may be fully reversibly interconverted between non-tubulin-binding trans and tubulin-binding cis isomeric forms, either by irradiation or spontaneously. The invention also concerns compounds with a azoaryl structure for use in studying the cytoskeleton and/or its associated processes, or in the treatment of a disease for which a tubulin polymerisation inhibition activity has a beneficial effect, wherein the compound is administered to the cell, organism or patient in need of such treatment in the trans form of the diazenyl bond, and where this trans form is inactive as regards a tubulin polymerisation inhibition effect, and where after photoisomerisation in vitro, in cellulo or in vivo to an azoaryl compound in its cis isomeric form of the diazenyl bond by the application of light, optionally with modification in vitro, in cellulo or in vivo of one or more substituents, the resultant cis form is active as regards a tubulin polymerisation inhibition effect.
Abstract:
Disclosed are an anti-bacterial acid dye containing silver which is prepared by combining a sulfonamide based anti-bacterial agent containing silver as a strong anti-bacterial reactant group with any of intermediates of dyes and a preparation method thereof. The inventive anti-bacterial acid dye containing silver which has yellow color can express a wide range of colors when two or more of the dyes are used in combination. If a fiber is dyed using the anti-bacterial acid dye containing silver according to the present invention, it enables production of an anti-bacterially functional fiber product that exhibits strong anti-bacterial properties to inhibit inhabitation or growth of microorganisms and, as a result, protects against contagious disease and bad odor and prevents staining and brittleness of fiber of the product.
Abstract:
The present invention provides disperse dyes of formula I where R1 to R4, A and B are each as defined in claim 1, processes for their preparation and their use.
Abstract:
The present invention provides disperse dyes of formula I where R 1 to R 4 , A and B are each as defined in claim 1, processes for their preparation and their use.
Abstract:
Chromogenic reagents, and more particularly compounds which function as selective cation-sensitive dyes are disclosed. The compounds are of formula (II) wherein X is a chromophore; Y and Z are -CH2(CHR-O-CHR)nCH2- in which n is an integer from 1 - 10 (which may be different for Y and Z) and each R independently is hydrogen or a substituent for hydrogen or when n is an integer from 2-10 at least one -CHR-CHR- group may additionally represent a substituted or unsubstituted arylene group; W indicates one or more optional substituents on the benzene ring; and A is a group imparting acidity to the molecule. Preferred compounds are those in which n = 2 for Z and n = 1 or 2 for Y; X is 4-nitrophenylazophenol and R is hydrogen or additionally when n is 2 at least one -CHR-CHR- group may represent a substituted or unsubstituted arylene group.
Abstract:
The present invention relates to dyes of formula (I) wherein R1 and R2 are each independently of the other hydrogen, vinyl, allyl or C1-C6alkyl which is unsubstituted or substituted by cyano, carboxy, hydroxy, C1-C6alkoxy or C6-C24aryl, R3 is hydrogen, C1-C6alkyl or C6-C24aryl, R4 is hydrogen, C1-C6alkyl or C6-C24aryl, 2-Cyano-C1-C6alkyl, 2-Alkoxy-C1-C6alkyl, 2-Oxo-C1-C6alkyl, n is 0, 1 or 2, and D denotes a radical of formula (2), (3), (4), (5), (6) or (7) wherein R5 is hydrogen, nitro, cyano or halogen, R6 and R7 are each independently of the other hydrogen, nitro, cyano or halogen, R8 and R9 are each independently of the other hydrogen, nitro, cyano or halogen, R10 and R11 are each independently of the other nitro, cyano, trifluoromethyl, carboxy, C1-C6alkyl, C1-C6alkoxy, C1-C6acylamino or halogen, R12 and R13 are each independently of the other hydrogen, nitro, cyano, trifluoromethyl, carboxy, C1-C6alkoxycarbonyl, C1-C6alkylsulfonyl, C1-C6alkylsulfonylamino, C1-C6acylamino or halogen, R14 represents nitro, cyano or halogen and R15 is C1-C6alkyl, and R16 is nitro, cyano, trifluoromethyl, carboxy, C1-C6alkylsulfonyl, C1-C6alkylsulfonylamino, C1-C6acylamino or halogen, and to the process for the preparation thereof and to the use thereof in dyeing or printing semi-synthetic and especially synthetic hydrophobic fibre materials, more especially textile materials.
Abstract:
A process for detecting marked mineral oils by treating the marked mineral oil with an extracting agent containing water, a solvent and a base, in which use is made as the marking agent of an azo dye of formula (I), in which ring A may be benzo-anellated and l is 1 or 2, m is 1 to 4, X is hydrogen, C1-C4-alkyl, cyano, nitro or possibly substituted phenylazo; X is hydrogen, C1-C4-alkyl, cyano, nitro, C1-C4-alkoxy or C1-C16-alkoxy carbonyl; X is hydrogen, C1-C4-alkyl, cyano or C1-C16-alkoxy carbonyl and X is hydrogen, hydroxy, possibly substituted C1-C8-alkyl, C1-C4-alkoxy, amino, C1-C4-dialkyl amino or possibly substituted C1-C16-monoalkylamino. A partially or completely water-miscible organic solvent is used as the solvent and the base is an alkaline or alkaline earth hydroxide, an alkali carbonate or a quaternary ammonium hydroxide. The invention also relates to the use of azo dyes as marking agents for mineral oils and novel azo dyes.