Patents by Inventor Norbert Krass

Norbert Krass has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6632838
    Abstract: The use of bissulfonamides for producing medicines for the treatment of hyperlipidemia. The invention relates to the use of bissulfonamides and their salts for producing medicines for the treatment of hyperlipidemia. The use of compounds of formula I in which the radicals have the stated meanings, and of their salts for producing a medicine for the treatment of hyperlipidemia is described.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: October 14, 2003
    Assignee: Aventis Pharma Deutschland GmbH
    Inventors: Reinhard Kirsch, Hans-Ludwig Schaefer, Eugen Falk, Norbert Krass
  • Patent number: 5939424
    Abstract: The invention relates to 4-Amino-2-ureidopyrimidine-5-carboxamides of the formula I ##STR1## in which R.sup.1 is H or (C.sub.1 -C.sub.8)-alkyl, where one or more H can be replaced by F; R.sup.2 is selected from the group consisting of F, Cl, Br, H, -O-(C.sub.1 -C.sub.8)-alkyl, and -S-(C.sub.1 -C.sub.8)-alkyl, where the alkyl groups have one or more H replaced by F; R.sup.3 is -O-(C.sub.1 -C.sub.8)-alkyl or -S-(C.sub.1 -C.sub.8)-alkyl, where the alkyl groups have one or more H replaced by F; or R.sup.2 and R.sup.3 together form -O-(C.sub.1 -C.sub.5)-alkylene-O-, where the alkylene portion has one or more H replaced by F; and their physiologically tolerable salts. The invention further provides processes for preparing the compounds of formula I. The compounds are suitable for the treatment of disorders of lipid metabolism.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: August 17, 1999
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans Georg Boger, Axel Hoffmann, Gerhard Jahne, Norbert Krass, Hans-Ludwig Schafer
  • Patent number: 5773447
    Abstract: The present invention relates to tertiary 4-amino-2-ureidopyrimidine-5-carboxamides of formula I: ##STR1## in which R.sup.1 is (C.sub.1 -C.sub.8)-alkyl wherein one or more H are replaced by F; R.sup.2 is selected from the group consisting of F, Cl, Br, H, --O--(C.sub.1 -C.sub.8)-alkyl and (C.sub.1 -C.sub.8)-alkyl, wherein one or more of the H of the alkyls can be replaced by F; R.sup.3 is selected from the group consisting of F, Cl, Br, H, --O--(C.sub.1 -C.sub.4)-alkyl and (C.sub.1 -C.sub.4)-alkyl, wherein one or more of the H of the alkyl can be replaced by F; R.sup.4 is CF.sub.3 or OCF.sub.3 ; and their physiologically tolerable salts. Process for preparing the compounds of formula I are also described. The compounds are suitable for the treatment of disorders of lipid metabolism.
    Type: Grant
    Filed: June 13, 1997
    Date of Patent: June 30, 1998
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gerhard Rackur, Hans Georg Boger, Norbert Krass, Axel Hoffmann, Michael Leineweber
  • Patent number: 5637721
    Abstract: The invention relates to a process which comprises a compound of the formula II ##STR1##
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: June 10, 1997
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Elisabeth Defossa, Gerd Fischer, Uwe Gerlach, Rolf Horlein, Norbert Krass, Rudolf Lattrell, Ulrich Stache, Theodor Wollmann
  • Patent number: 5614623
    Abstract: Enterally absorbable diastereomers of 1-(isopropoxycarbonyloxy)ethyl (6R, 7R)-7-[2-(2-aminothiazol-4-yl)-2-(Z)-(methoxyimino)acetamido]-3-(methoxyme thyl)-3-cephem-4-carboxylate of the formula I ##STR1## and their physiologically acceptable salts and also diastereomerically pure salts of the compounds of the formula II ##STR2## where HX is a mono- or polybasic acid and where X is an inorganic or organic physiologically acceptable anion, and a process for the preparation of these compounds of the formula I or II, which comprises first precipitating the more sparingly soluble diastereomer of the formula IV in the mixing together of 1 equivalent of a solution of the diastereomer mixture of the formula III with 0.2-2 equivalents of a solution of the acid component HY and separating it off by filtration, then precipitating the more readily soluble diastereomer of the formula IV from the filtration solution, it being possible for the acid component HY to be identical or different in the consecutive steps.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: March 25, 1997
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gerd Fischer, Elisabeth Defo.beta.a, Uwe Gerlach, Rolf H orlein, Norbert Krass, Rudolf Lattrell, Ulrich Stache, Theodor Wollmann, Dieter Isert
  • Patent number: 5589594
    Abstract: The invention relates to a process for the preparation of cephem prodrug esters of the formula: ##STR1## in which R.sup.1 is C.sub.1 -C.sub.5 -alkanoyloxy-C.sub.1 -C.sub.3 -alkyl or C.sub.1 -C.sub.5 -alkoxycarbonyloxy-C.sub.1 -C.sub.3 -alkyl and X is an inorganic or organic anion, and in which the hydroxyimino group is present in the syn-form.
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: December 31, 1996
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Elisabeth Defossa, Gerd Fischer, Uwe Gerlach, Rolf Horlein, Norbert Krass, Rudolf Lattrell, Ulrich Stache, Theodor Wollmann
  • Patent number: 5550232
    Abstract: Enterally absorbable diastereomers of 1-(isopropoxycarbonyloxy)ethyl (6R,7R)-7-[2-(2-aminothiazol-4-yl)-2-(Z)-(methoxyimino)acetamido]-3-(metho xymethyl)-3-cephem-4-carboxylate of the formula I ##STR1## and their physiologically acceptable salts and also diastereomerically pure salts of the compounds of the formula II ##STR2## where HX is a mono- or polybasic acid and where X is an inorganic or organic physiologically acceptable anion, and a process for the preparation of these compounds of the formula I or II, which comprises first precipitating the more sparingly soluble diastereomer of the formula IV in the mixing together of 1 equivalent of a solution of the diastereomer mixture of the formula III with 0.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: August 27, 1996
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gerd Fischer, Elisabeth Defossa, Uwe Gerlach, Rolf H orlein, Norbert Krass, Rudolf Lattrell, Ulrich Stache, Theodor Wollmann, Dieter Isert
  • Patent number: 5461043
    Abstract: Enterally absorbable diastereomers of 1-(isopropoxycarbonyloxy)ethyl (6R,7R)-7-[2-(2-aminothiazol-4-yl)-2-(Z)-(methoxyimino)acetamido]-3-(metho xymethyl)-3-cephem-4-carboxylate of the formula I ##STR1## and their physiologically acceptable salts and also diastereomerically pure salts of the compounds of the formula II ##STR2## where HX is a mono- or polybasic acid and where X is an inorganic or organic physiologically acceptable anion, and a process for the preparation of these compounds of the formula I or II, which comprises first precipitating the more sparingly soluble diastereomer of the formula IV in the mixing together of 1 equivalent of a solution of the diastereomer mixture of the formula III with 0.
    Type: Grant
    Filed: September 3, 1992
    Date of Patent: October 24, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Gerd Fischer, Elisabeth Defossa, Uwe Gerlach, Rolf Horlein, Norbert Krass, Rudolf Lattrell, Ulrich Stache, Theodor Wollmann, Dieter Isert
  • Patent number: 5410042
    Abstract: The present invention relates to a process for the preparation of 7-amino-3-methoxymethylceph-3-em-4-carboxylic acid (I) from 7-amino-3-methoxymethylceph-3-em-4-carboxylic acid esters (II) or their salts by ester cleavage.The process comprises treating the compound II with formic acid, trifluoroacetic acid, methanesulfonic acid or trifluoromethanesulfonic acid or a mixture of two of these acids in each case.
    Type: Grant
    Filed: May 19, 1993
    Date of Patent: April 25, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Norbert Krass, Elisabeth Defossa, Gerd Fischer, Uwe Gerlach, Rolf Hoerlein, Rudolf Lattrell, Adolf H. Linkies, Wolfgang Martin, Ulrich Stache, Theodor Wollmann
  • Patent number: 5405844
    Abstract: Tetracyclic antibiotics and processes for their preparation .beta.-Lactam antibiotics of the formula I, and their pharmaceutically tolerable salts ##STR1## where X is (CH.sub.2).sub.0-2, CR(a)R(b), O, SO.sub.0-2 or NR(c),R1, R2 and R3 are a multiplicity of substituents, are outstanding antibiotics with remarkably good antibacterial activity both against gram-positive and against gram-negative microorganisms. They have a high stability to renal dehydropeptidase.
    Type: Grant
    Filed: May 28, 1992
    Date of Patent: April 11, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Uwe Gerlach, Rolf Horlein, Norbert Krass, Rudolf Lattrell, Theo Wollmann, Michael Limbert, Astrid Markus