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公开(公告)号：CA1224802A
公开(公告)日：1987-07-28
申请号：CA451923
申请日：1984-04-13
Applicant: HOECHST AG
Inventor： WEISS ERWIN , RUPP WALTER
IPC: C08F30/00 , C07F9/38 , C07F9/40 , C08F30/02 , C08F230/02
Abstract: of the disclosure 2-Methacrylamido-2-methylpropanephosphonic acid of the formula I I is prepared by reaction of 2-methylprop-1-ene-1-phosphonic acid or 2-methylprop-2-ene-1-phosphonic acid the methacrylonitrile in the presence of an equimolar amount of a strong acid. The compound is suitable as such or in the form of its salts as comonomer for the manufacture of copolymers, which are used inter alia as dyeing auxiliaries and as scale inhibitors.
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公开(公告)号：CA1235142A
公开(公告)日：1988-04-12
申请号：CA485887
申请日：1985-06-28
Applicant: HOECHST AG
Inventor： KLEINER HANS-JERG , WEISS ERWIN
IPC: C07F9/53
Abstract: Tertiary aromatic phosphine sulfides of the formula wherin X = F, Cl or Br, are prepared by means of a Friedel-Crafts reaction of a) PCl3 with benzene and - after the addition of sulfur - also with fluorobenzene, chlorobenzene or bromobenzene, or b) PSCl3 with fluorobenzene, chlorobenzene or bromobenzene and subsequently also with benzene; Friedel-Crafts catalysts are Al halides, especially AlCl3. The products are used as end products and intermediates in a variety of areas, such as, for example, the sectors of plant protection and polymers.
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公开(公告)号：CA1247647A
公开(公告)日：1988-12-28
申请号：CA517869
申请日：1986-09-10
Applicant: HOECHST AG
Inventor： KLEINER HANS-JERG , WEISS ERWIN
IPC: C07F9/53
Abstract: of the disclosure Tertiary aromatic phosphine oxides of the formula in which X = F, Cl or Br, are prepared by Friedel-Crafts reaction of a) phenylthiophosphonic dichloride with fluoro-, chloro or bromobenzene, or b) of dichlorophenylphosphine, sulfur and fluoro-, chloro or bromobenzene, and c) subsequent conversion of the phosphine sulfides pro duced by a) or b) using H2O2 in a solvent which comprises at least about 2% by weight, preferably at least about 10% by weight, of optionally halogenated lower aliphatic carboxylic acids and/or their anhydrides and, if appropriate, of other inert solvents which are miscible therewith. The reaction products are final products and intermediates in various specialized fields, such as, for example, in the plant protection sector and the polymers sector.
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Patent Agency Ranking
公开(公告)号：CA1311249C
公开(公告)日：1992-12-08
申请号：CA545596
申请日：1987-08-28
Applicant: HOECHST AG
Inventor： SIEGEL HERBERT , WEISS ERWIN , BERGER HARALD
Abstract: HOE 86/F 223 The invention relates to a process for the preparation of vinylphosphonic dichloride through elimination of hydrogen chloride from 2-chloroethanephosphonic dichloride in the presence of catalysts. The catalysts used are tertiary phosphines, quaternary ammonium or phosphonium salts or alkali metal or alkaline-earth metal halides. When triphenyl phosphine is used as the catalyst, the reaction is carried out under reduced pressure at a temperature of 130 to 166.degree.C and the vinylphosphonic dichloride produced is simultaneously removed by distillation under reduced pressure. When the other catalysts are used, the process can be carried out at atmospheric pressure or reduced pressure and at temperatures of about 130 to 220.degree.C and the vinylphosphonic dichloride produced can be removed by distillation simultaneously with or subsequent to the reaction.
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公开(公告)号：CA1304405C
公开(公告)日：1992-06-30
申请号：CA545597
申请日：1987-08-28
Applicant: HOECHST AG
Inventor： SIEGEL HERBERT , WEISS ERWIN , BERGER HARALD
Abstract: HOE 86/F 224 The invention relates to a process for the preparation of vinylphosphonic dichloride, in which a 2-chloroethane-phosphonate of the formula or or a mixture of the two esters, is reacted with thionyl chloride at a temperature of 60 to 160.degree.C in the presence of a catalyst which contains tertiary phosphines, quaternary ammonium or phosphonium salts or alkali metal or alkalineearth metal halides. During this reaction, any thionyl chloride which may be present is removed by distillation subsequent to this reaction, the mixture remaining is heated to 140 to 200.degree.C, and the vinylphosphonic dichloride produced during this is removed by distillation.
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公开(公告)号：CA1304404C
公开(公告)日：1992-06-30
申请号：CA545595
申请日：1987-08-28
Applicant: HOECHST AG
Inventor： SIEGEL HERBERT , WEISS ERWIN , BERGER HARALD
Abstract: HOE 86/F 225 The invention relates to a process for the preparation of 2-chloroethanephosphonic dichloride through reaction of a 2-chloroethanephosphonate of the formula or or a mixture of the two esters, with thionyl chloride at a temperature of 60 to 160.degree.C. In this reaction, tertiary phosphines, quaternary ammonium or phosphonium salts or alkali metal or alkaline-earth 0etal halides are employed as catalysts. The thionyl chloride is introduced into the initially introduced ester.
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公开(公告)号：CA1247134A
公开(公告)日：1988-12-20
申请号：CA517868
申请日：1986-09-10
Applicant: HOECHST AG
Inventor： WEISS ERWIN
IPC: C07F9/53
Abstract: Tertiary phosphine oxides are prepared by oxidation of tertiary phosphine sulfides using H2O2 in a solvent comprising about 2 - 20% by weight of optionally halogenated lower aliphatic carboxylic acids and the remainder of mono- or polyhydric aliphatic or cycloaliphatic alcohols if appropriate in mixtures with other inert solvents which are miscible with the carboxylic acid/alcohol mixture. Preferred solvents comprise acetic acicl/methanol and acetic acid/ethanol mixtures. The reaction products are final products and intermediates products in various specialized fields such as, for example, the plant protection sector and the polymers sector.
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公开(公告)号：CA1234839A
公开(公告)日：1988-04-05
申请号：CA485886
申请日：1985-06-28
Applicant: HOECHST AG
Inventor： WEISS ERWIN
IPC: C07F9/53
Abstract: HOE 84/F 162 Tertiary phosphine oxides are prepared by the oxidation of tertiary phosphine sulfides with H2O2 in a solvent composed of at least about 20% by weight, preferably at least about 50% by weight, of optionally halogenated, lower aliphatic carboxylic acids and/or their anhydrides; it is particularly preferred if the solvent is composed only of acetic acid. The reaction products are end products and intermediates in a variety of areas such as, for example, the sectors of plant protection and polymers.
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