- METHOD FOR PRODUCING BIS(FLUORALKYL)PHOSPHINIC ACID CHLORIDES OR FLUORALKYLPHOSPHONIC ACID CHLORIDES
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The invention relates to a process for the preparation of bis(fluoroalkyl)phosphinyl chlorides or fluoroalkylphosphonyl dichlorides by reaction of the corresponding bis(fluoroalkyl)phosphinic acid or fluoroalkylphosphonic acid with aryltetrachlorophosphorane as chlorinating agent
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Page/Page column 3
(2011/06/19)
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- Ionic-Molecular Isomerism in Chlorophenylphosphoranes PhnPCl5-n (1n3)
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Both ionic and molecular modifications of the three chlorophenylphosphoranes PhnPCl5-n (1n3) have been isolated for the first time as solids and all have been characterised by elemental analysis, Raman spectroscopy and 31P magic angle spinning (MAS) NMR spectroscopy.
- Al-Juboori, Mohammad A. H. A.,Gates, Peter N.,Muir, Alan S.
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p. 1270 - 1271
(2007/10/02)
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- Process of converting a carboxylic acid or carboxylic acid halide group to a trihalomethyl group
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Carboxylic acid or carboxylic acid halide groups on aryl or heterocyclic aryl rings are directly converted to trihalomethyl groups by using a phenylhalophosphorane, optionally generated in situ by reaction of a phenylphosphonous halide and chlorine.
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- Preparation of aryl halides
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A process for selectively substituting an aromatic nitro group with a halo group which comprises contacting the nitroaromatic compound with a phosphorushalide of formula: Rn PX5-n wherein n is selected from 0, 1, 2 and 3; R is selected from the group consisting of C-6 to C-10 aryl and substituted aryl wherein the substituents are selected from the group consisting of: straight and branched chain alkyl, alkoxy, and haloalkyl; halogen, sulfonate and mixtures thereof; and X is a halogen in the presence of an arylphosphorusoxydihalide solvent. The use of an arylphosphorustetrahalide and particularly phenylphosphorustetrachloride is preferred. The arylphosphorustetrahalide can be prepared in situ by contacting a solution of the corresponding arylphosphorusdihalide in an arylphosphorusoxydihalide solvent with a halogen. The process can further comprise the step of heating the reaction mixture to maintain a temperature of from about 100° C. to about 175° C. for from about 1 hour to about 24 hours.
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