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公开(公告)号：BR8400946A
公开(公告)日：1984-10-16
申请号：BR8400946
申请日：1984-02-29
Applicant: DEGUSSA
Inventor： DRAUZ KARLHEINZ , KLEEMANN AXEL , WIRTHWEIN ROLF
IPC: C01B15/017
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公开(公告)号：NO149209C
公开(公告)日：1984-03-07
申请号：NO781159
申请日：1978-04-03
Applicant: DEGUSSA
Inventor： KLEEMANN AXEL , JAKOVLEV VLADIMIR , THIEMER KLAUS , ENGEL JUERGEN
IPC: C07D295/08 , A61K31/495 , A61K31/496 , A61P25/18 , A61P25/20 , C07D213/74 , C07D213/80 , C07D295/033 , C07D295/088 , C07D295/092 , C07D295/135 , C07D303/24 , C07D307/68 , C07D333/38 , C07D295/10 , C07D401/04 , C07D401/12
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公开(公告)号：MX5737E
公开(公告)日：1984-01-30
申请号：MX910580
申请日：1980-10-17
Applicant: DEGUSSA
Inventor： SUCHSLAND HELMUT , HAFNER VOLKER , KLEEMANN AXEL
IPC: C07C253/08 , C07C20060101 , C07C67/00 , C07C253/00 , C07C255/24 , C07C255/61 , C07C121/18
Abstract: The invention is directed to a process for the production of iminodiacetonitrile by reaction of hexamethylenetetramine with hydrogen cyanide in acidic aqueous mediums. In this process the pH during the reaction which is 5.5 to 7.5 at the beginning is progressively lowered, altogether around 0.5 to 3.5 units and free formaldehyde is present only to a slight extent. Through this and in contrast to the known processes the formation of byproducts is suppressed and iminodiacetonitrile is produced directly in very good yields and sufficiently pure for further use.
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公开(公告)号：CA1142962A
公开(公告)日：1983-03-15
申请号：CA371382
申请日：1981-02-20
Applicant: DEGUSSA
Inventor： KLEEMANN AXEL , SCHALKE PETER
IPC: C07C255/04 , C07C67/00 , C07C253/00 , C07C253/04 , C07C253/34 , C07C121/22
Abstract: Malonic dinitrile is produced for the first time from its reaction gas which is formed by reaction of acetonitrile and cyanogen chloride, by partial condensation in decreasing temperature stages, i.e., while avoiding a contact with the simultaneously formed hydrogen chloride.
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Patent Agency Ranking
公开(公告)号：FI830037A0
公开(公告)日：1983-01-06
申请号：FI830037
申请日：1983-01-06
Applicant: DEGUSSA
Inventor： KLEEMANN AXEL , MARTENS JYRGEN , WEIGEL HORST
IPC: C07B57/00 , C07B31/00 , C07C20060101 , C07C67/00 , C07C313/00 , C07C319/28 , C07C323/58 , C07C
Abstract: The subject matter of the invention is a process for the recovery of S-(carboxymethyl)-(R)-cysteine and S-(carboxymethyl)-(S)-cysteine from a mixture of the two enantiomers. The mixture to be separated is dissolved in water in the presence of sufficient ammonia that the ammonium salt solution formed has a pH between 6 and 9. Then there is brought about in the solution of ammonium salt a state of supersaturation by the addition of seeding crystals of the ammonium salt of one of the two enantiomers, insofar as the starting material contains one of the two enantiomers in excess, the ammonium salt of this enantiomer, the ammonium salt of one of the two enantiomers is brought to crystallization and separated off. Subsequently by addition of seeding crystals of the ammonium salt of the other enantiomers to the remaining mother liquor the ammonium salt of this enantiomer is likewise brought to crystallization and separated off. Finally the respective S-(carboxymethyl)-cysteine is set free from the two ammonium salts.
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公开(公告)号：FR2508036A1
公开(公告)日：1982-12-24
申请号：FR8207971
申请日：1982-05-07
Applicant: DEGUSSA
Inventor： KLEEMANN AXEL , MARTENS JURGENS , WEIGEL HORST
IPC: C07C67/00 , C07C237/00 , C07C253/00 , C07C255/24 , C07C255/27 , C07C255/29 , C07C255/56 , C07D205/04 , C07D207/10 , C07D207/12 , C07D207/16 , C07D211/40 , C07D211/60 , C07D211/62 , C07D227/06 , C07D233/56 , C07D233/58 , C07D233/64 , C07D295/18 , C07K5/02 , C07C121/417
Abstract: There are prepared specific alpha -aminocarboxylic acids or their methyl, ethyl, or benzyl esters in which the alpha -amino group is substituted by a 3-cyanopropanoyl group. The compounds are useful for producing the corresponding derivatives of 4-aminobutyramide ("Gabamide") by catalytic hydrogenation of the cyano group.
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公开(公告)号：FI824337A0
公开(公告)日：1982-12-16
申请号：FI824337
申请日：1982-12-16
Applicant: DEGUSSA
Inventor： BETHGE HORST , KLEEMANN AXEL , MARTENS JYRGEN
IPC: C07B55/00 , C07B31/00 , C07C20060101 , C07C67/00 , C07C313/00 , C07C319/20 , C07C323/58 , C07C
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公开(公告)号：CA1136643A
公开(公告)日：1982-11-30
申请号：CA314569
申请日：1978-10-27
Applicant: DEGUSSA
Inventor： SCHWARZE WERNER , KLEEMANN AXEL
IPC: C07C69/63 , C07C20060101 , C07C67/00 , C07C67/03 , C07C69/62
Abstract: The present invention provides a process for the preparation of .gamma.-chloroalkane-carboxylic acid esters which have the general formula I: (I) in which R, R1, R2, R3, R4 and R5 are the same or different and represent a straight chain or a branched chain alkyl group having 1 to 4 carbon atoms, or with the exception of R, represents a hydrogen atom, for the corresponding butyrolactone of the formula where R1 - R5 are as above, an alcohol of the formula ROH where R is as above, and thionyl chloride, in which the butyrolactone is first dissolved in at least an equimolar quantity of the absolute alcohol and is reacted, thereafter with at least an equimolar quantity of thionyl chloride and the .gamma.-chloroalkane-carboxylic acid ester so formed is separated from the byproducts of the reaction, hydrogen chloride and sulphur dioxide.
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公开(公告)号：FR2500448A1
公开(公告)日：1982-08-27
申请号：FR8202492
申请日：1982-02-16
Applicant: DEGUSSA
Inventor： KLEEMANN AXEL , FAHNENSTICH RUDOLF
IPC: C07C319/20 , B01J31/28 , C07B61/00 , C07C20060101 , C07C67/00 , C07C313/00 , C07C323/22 , C07C149/18
Abstract: The invention is directed to 4-methylmercapto-2-cacetoxy-butyraldehyde of the formula (I) and a process for its production by hydroformylating 3-methylmercapto-1-acetoxy-propene-1 of the formula (II) 4-methylmercapto-2-acetoxy-butyraldehyde can be used as an intermediate product for the production of 4-methylmercapto-2-hydroxy-butyric acid, the hydroxy analogue of methionine.
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