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公开(公告)号：DE2750661A1
公开(公告)日：1979-05-17
申请号：DE2750661
申请日：1977-11-12
Applicant: BASF AG
IPC: C07D209/48
Abstract: Prodn. of 3,4,6-trichlorophthalimide (I) comprises treatment of 3,4,5,6-tetrachlorocyclohexadiene-1,2-dicarboxylic acid ester (II) with a base at up to 200 degrees C to give a 3,4,6-trichlorophthalate ester (III). This is then reacted at 100-200 degrees C with cpds. which release NH3 under the reaction conditions. (II) is esp. the dimethyl ester. (I) is an intermediate for pesticides, fungicides, pharmaceuticals, dyes and plastics processing auxiliaries. Provides simple method giving high yields without prodn. of byprods. or isomers.
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公开(公告)号：DE3031193A1
公开(公告)日：1982-04-08
申请号：DE3031193
申请日：1980-08-18
Applicant: BASF AG
Inventor： DIMROTH PETER DIPL CHEM DR , KEMPER REINHARD DIPL CHEM DR , RADTKE VOLKER DIPL CHEM DR , PUETTER HERMANN DIPL CHEM DR
IPC: C07C211/50 , C07C67/00 , C07C209/00 , C07C209/54 , C07C85/00 , C07C87/50 , C07C87/60 , C07C93/14
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公开(公告)号：DE2751173A1
公开(公告)日：1979-05-17
申请号：DE2751173
申请日：1977-11-16
Applicant: BASF AG
IPC: C07C51/09 , C07C51/56 , C07C63/68 , C07D307/89
Abstract: Prodn. of 3,4,6-trichlorophthalic anhydride (I) comprises treating a 3,4,5,6-tetrachlorocyclohexadiene-1,2-dicarboxylic acid ester (II) with a base at up to 200 degrees C to give a 3,4,6-trichlorophthalate ester (III). (III) is then saponified conventionally to the diacid and this converted to (I) by heating. Esp. (II) is the dimethyl ester. (I) is an intermediate for pesticides, fungicides, pharmaceuticals, dyes and plastics processing additives. Simple process gives high yields without formation of by-prods. or isomers.
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Patent Agency Ranking
公开(公告)号：DE3118020A1
公开(公告)日：1982-11-25
申请号：DE3118020
申请日：1981-05-07
Applicant: BASF AG
Inventor： PUETTER HERMANN DIPL CHEM DR
IPC: C07C225/34 , C07C97/24 , C07C101/80
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公开(公告)号：DE2915736A1
公开(公告)日：1980-11-06
申请号：DE2915736
申请日：1979-04-19
Applicant: BASF AG
Inventor： PUETTER HERMANN DIPL CHEM DR , EILINGSFELD HEINZ DIPL CHEM DR , DEGNER DIETER DIPL CHEM DR
Abstract: In the prepn. of naphthoquinone derivs. of formula (I), a 1-naphthol derivs. of formula (II) is treated with a cerium IV salt in the presence of water at up to 100 degrees C: In the formulae, R1-4 are H, halogen, 1-4C alkyl, COOM, SO3H, CN or acyl, and R3 and R4 can also be 1-3C alkoxy or NO2; and X is H, 1-4C alkyl, phenyl, OCH3, OC2H5, a group -NR5R6 (in which R5 and R6 are H or 1-4C alkyl and R6 can also be phenyl) or a gp. of formula (III). (I) are useful as intermediates for vitamins and dyestuffs. They are also useful as intermediates for anthraquinones (c.f. Chem. Eng. 1978, 18, 74C). (I) are obtd. smoothly and in high space-time yields.
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公开(公告)号：DE3300865A1
公开(公告)日：1983-07-21
申请号：DE3300865
申请日：1983-01-13
Applicant: BASF AG
Inventor： PUETTER HERMANN DIPL CHEM DR , ROOS HANS DIPL CHEM DR
Abstract: Aqueous titanium(III) chloride solutions are produced by cathodic reduction of titanium(IV) chloride solutions in cells in which the catholyte and anolyte are separated from one another. The cathodes used are graphite electrodes whose surface is coated with borides, silicides, carbides, nitrides and/or oxides of titanium, tungsten, zirconium, tantalum, niobium and/or hafnium.
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公开(公告)号：DE2731743A1
公开(公告)日：1979-02-01
申请号：DE2731743
申请日：1977-07-14
Applicant: BASF AG
Inventor： PUETTER HERMANN DIPL CHEM DR
Abstract: Prodn. of 1-amino-4-alkoxynaphthalenes (I) comprises electrolytic redn. of a 4-unsubstd.-1-nitronapthalene (II) at up to 100 degrees C in presence of an aliphatic alcohol and of H2SO4, methoxysulphuric acid or methanesulphonic acid of >=50% concn. Esp. the electrolyte comprises (wt.%) 0.5-15% (II); 5-35% of >=70 wt.% H2SO4; 50-94.5% alcohol (esp. (m)ethanol or propanol) and 0-30% of a non-aqs. solvent. Results in high yields with reduced by-prod. formation and energy consumption. (I) are prepd. in a single step c.f. 3-step prodn. from alpha-naphthol.
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