- Method for efficiently synthesizing fluorine-containing compound
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The invention discloses a method for efficiently synthesizing a fluorine-containing compound, and relates to the field of fluorine-containing compound synthesis. The method is a method for generating a corresponding fluorine atom substituted fluorine-containing compound by reacting aromatic chloride or activated chloride serving as a raw material with potassium fluoride under the action of a novel catalyst. The method disclosed by the invention has the advantages of good product selectivity, high efficiency, mild reaction conditions, simplicity and convenience in operation, convenience in application and the like.
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Paragraph 0077-0079
(2021/06/26)
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- METHOD OF INCREASING THE SPF RATING AND COMPOUNDS SUITABLE FOR INCREASING THE SPF RATING OF FIBRE OR FABRIC
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PCT No. PCT/AU93/00412 Sec. 371 Date Jun. 15, 1995 Sec. 102(e) Date Jun. 15, 1995 PCT Filed Aug. 12, 1993 PCT Pub. No. WO94/04515 PCT Pub. Date Mar. 3, 1994The present invention provides a method of increasing the sun protection factor (SPF) rating of a fiber or fabric, comprising the steps of providing a UVR absorber, applying the UVR absorber to a fabric, whereby the UVR absorber is attached to the fiber and an application of less than 3% UVR absorber on weight of fiber produces an SPF rating of greater than 20 for the UVR absorber and fabric combination.
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- Solvents for use in fluorination reactions
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A method of fluorinating an organic compound comprising reacting an organic compound with a fluorinating agent characterized in that a perfluorocarbon compound is present in the reaction medium. The perfluorocarbon compound may replace an amount of a solvent which would otherwise be required for the reaction to proceed efficiently. The perfluorocarbon compound is readily recoverable after reaction and may be re-used in subsequent reactions. Additives to the reaction medium, such as 18-crown-6, may increase the amoun of solvent which may be replaced. The method is beneficial where solvent consumption would otherwise be large, or where solvent recovery would otherwise be difficult.
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- Perfluorocarbon fluids as solvent replacements
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Perfluoroperhydrophenanthrene 1 may be used as a 'bulking agent' to minimise the problem of solvent recovery in halogen exchange ('Halex') reactions for the preparation of octafluorocyclopentene 8, and chlorofluoro-pyridine, -pyrimidine and -benzene derivatives. New 'one-pot' procedures for the syntheses of hexafluorobut-2-yne 3, octafluorobut-2-ene 11 and hexafluorocyclobutene 7 are described.
- Chambers, Richard D.,Edwards, Andrew R.
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p. 3623 - 3627
(2007/10/03)
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- Mono- and bis-azo compounds containing 6-hydroxy-3-heterocyclic onium-pyridone-2-groupings coupled to diazo components containing diazine or triazine rings
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Reactive dyes of the formula STR1 where n is 1 or 2, X is a six-membered halogen-containing nitrogen heterocycle, L1, depending on n, is fluorine, chlorine, C1 -C4 -alkoxy, phenoxy, C1 -C4 -alkyl, substituted or unsubstituted phenyl or a bridge member which has one or two hydroxysulfonyl groups, D is the radical of a diazo component of the aniline or naphthalene series which has at least one hydroxysulfonyl group, L2 is hydrogen or substituted or unsubstituted C1 -C8 -alkyl, L3 is the cationic radical of an aromatic heterocycle which is linked to the pyridone ring via a nitrogen atom, and L4 is hydrogen or C1 -C4 -alkyl, with the proviso that the number of hydroxysulfonyl groups in the molecule exceeds that of the cationic groups by at least one, are useful for dyeing and printing hydroxyl- or nitrogen-containing substrates.
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- Reactive disazo dyes and their use: containing two 2,4-difluoro-5-chloro-pyrimidyl residues
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Reactive dyes of the formula STR1 in which M is twice-coupled 1-amino-8-hydroxynaphthalene-3,6-disulfonic acid, 1-amino-8-hydroxynaphthalene-4,6-disulfonic acid, 1-amino-8-hydroxynaphthalene-4-sulfonic acid or 2-amino-5-hydroxynaphthalene-7-sulfonic acid, A and B, independently of each other, are each sulfophenylene or sulfonaphthylene which can be further substituted, and X1 and X2 are each a 2,4-difluoro-5-chloropyrimid-6-yl radical, subject to the condition that A and B together contain at least 3 sulfo groups, are particularly suitable for dyeing and printing cellulose-containing fibre materials and produce, in high dyeing yield, dyeings and prints having good fastness properties.
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- SUBSTITUTIVE AROMATIC FLUORINATION WITH CHLORINE PENTAFLUORIDE
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In contrast to limited substitutive fluorination of aromatics with halogen fluorides such as ClF, ClF3, BrF3 and IF5, fluorination is the predominant reaction path with ClF5.Under non-catalytic liquid phase conditions, benzene was converted to fluorobenzene (54percent yield) and chlorobenzene (37percent yield), respectively.For a heterocyclic substrate, i.e. 2,4,6-trifluoropyrimidine, sunstitutive fluorination predominated over chlorination.Three possible fluorination mechanisms are discussed.A transition complex of ClF5 with benzene is favored.Enhanced exchange fluorination of CCl4 was effected with ClF5 (CF2Cl2 >> CFCl3 > CF3Cl) as compared with ClF3 (CFCl3 >> CF2Cl2)
- Boudakian, Max M.,Hyde, Gene A.
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p. 435 - 446
(2007/10/02)
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- Reactive dyestuffs containing urea alkylene linkage between chromophore and reactive radical
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Dyestuffs are disclosed having the formula STR1 in which W is a reactive radical; D is the radical of an organic dyestuff; X1 is hydrogen or alkyl; X2 and X3 are hydrogen, alkyl, cycloalkyl, aralkyl or aryl; or X2 and X3 together are alkylene; Alkylene is C1 -C6 -alkylene or cycloalkylene; and n is 0 or 1. The dyestuffs are used in the dyeing of textile materials containing hydroxyl groups and nitrogen, especially natural and regenerated cellulose, wool, silk, synthetic polyamide fibers and synthetic polyurethane. The dyeings obtained are, in general, distinguished by good to very good fastness properties, especially by excellent wet fastness.
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- Method for isolating albumin using insoluble supports coupled to a dye
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A method for the isolation of albumin which allows the selective adsorption and substantially quantitative elution of albumin from mixtures containing the same. The method comprises contacting a solution which contains albumin with a member of a series of dye-insoluble support compounds in which the insoluble support is a polyhydroxy polymer coupled to a dye by means of a reactive pyrimidine. The albumin which is selectively adsorbed can be readily eluted resulting in essentially a quantitative recovery of pure albumin.
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