Patents by Inventor Carsten Seilz

Carsten Seilz 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).

  • Process for the production of 3-oxo-pregn-4-ene-21,17-carbolactones by the metal-free oxidation of 17-(3-hydroxypropyl)-3,17-dihydroxyandrostanes
    Patent number: 8658788
    Abstract: This invention relates to processes for the production of 3-oxo-pregnane-21,17-carbolactones of formula II as well as 3-oxo-pregn-4-ene-21,17-carbolactones of formula III by the metal-free oxidation of 17-(3-hydroxypropyl)-3,17-dihydroxyandrostanes of formula I In addition, the invention relates to the dichloromethane hemisolvate of 6?,7?;15?,16?-dimethylene-3-oxo-17?-pregnan-5?-ol-21,17-carbolactone (IV) as such as well as to a process for the production of drospirenone.
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: February 25, 2014
    Assignee: Bayer Pharma AG
    Inventors: Carsten Seilz, Hartmut Seba
  • Process for the Production of 3-Oxo-pregn-4-ene-21,17-carbolactones by the Metal-Free Oxidation of 17-(3-Hydroxypropyl)-3,17-dihydroxyandrostanes
    Publication number: 20110275796
    Abstract: This invention relates to processes for the production of 3-oxo-pregnane-21,17-carbolactones of formula II as well as 3-oxo-pregn-4-ene-21,17-carbolactones of formula III by the metal-free oxidation of 17-(3-hydroxypropyl)-3,17-dihydroxyandrostanes of formula I In addition, the invention relates to the dichloromethane hemisolvate of 6?,7?;15?,16?-dimethylene-3-oxo-17?-pregnan-5?-ol-21,17-carbolactone (IV) as such as well as to a process for the production of drospirenone.
    Type: Application
    Filed: July 21, 2011
    Publication date: November 10, 2011
    Inventors: Carsten SEILZ, Hartmut Seba
  • Process for the production of 3-oxo-pregn-4-ene-21, 17-carbolactones by the metal free oxidation of 17-(3-hydroxypropyl)-3, 17-dihydroxyandrostanes
    Patent number: 7319154
    Abstract: This invention relates to processes for the production of 3-oxo-pregnane-21,17-carbolactones of formula II as well as 3-oxo-pregn-4-ene-21,17-carbolactones of formula III by the metal-free oxidation of 17-(3-hydroxypropyl)-3,17-dihydroxyandrostanes of formula I In addition, the invention relates to the dichloromethane hemisolvate of 6B,7B;15?,16?-diethylene-3-oxo-17?-pregnan-5?-ol-21,17-carbolactone (IV) as such.
    Type: Grant
    Filed: July 21, 2005
    Date of Patent: January 15, 2008
    Assignee: Bayer Schering Pharma AG
    Inventors: Carsten Seilz, Hartmut Seba
  • Process for the production of 3-oxo-pregn-4-ene-21, 17-carbolactones by the metal-free oxidation of 17-(3-hydroxypropyl)-3,17-dihydroxyandrostanes
    Publication number: 20070049747
    Abstract: This invention relates to processes for the production of 3-oxo-pregnane-21,17-carbolactones of formula II as well as 3-oxo-pregn-4-ene-21,17-carbolactones of formula III by the metal-free oxidation of 17-(3-hydroxypropyl)-3,17-dihydroxyandrostanes of formula I In addition, the invention relates to the dichioromethane hemisolvate of 6?,7?;15?,16?-dimethylene-3-oxo-17?-pregnan-5?-ol-21,17-carbolactone (IV) as such as well as to a process for the production of drospirenone.
    Type: Application
    Filed: July 21, 2006
    Publication date: March 1, 2007
    Inventors: Carsten Seilz, Hartmut Seba
  • Process for the production of 3-oxo-pregn-4-ene-21,17-carbolactones by the metal free oxidation of 17-(3-hydroxypropyl)-3,17-dihydroxyandrostanes
    Publication number: 20070021603
    Abstract: This invention relates to processes for the production of 3-oxo-pregnane-21,17-carbolactones of formula II as well as 3-oxo-pregn-4-ene-21,17-carbolactones of formula III by the metal-free oxidation of 17-(3-hydroxypropyl)-3,17-dihydroxyandrostanes of formula I In addition, the invention relates to the dichloromethane hemisolvate of 6B,7B;15?,16?-diethylene-3-oxo-17?-pregnan-5?-ol-21,17-carbolactone (IV) as such.
    Type: Application
    Filed: July 21, 2005
    Publication date: January 25, 2007
    Inventors: Carsten Seilz, Hartmut Seba
  • Process for the alkylation of estrone derivatives
    Patent number: 5621124
    Abstract: The invention relates to a process for the alkylation of estrone derivatives, which is characterized in that a suspension of the estrone derivatives in dimethylformamide is produced and carbonic acid diester and guanidine and/or alkyl guanidines are dissolved in it and in the largely oxygen-free mixture, the reaction is performed at 100.degree.-200.degree. C. under the reaction pressure being established.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: April 15, 1997
    Assignee: Schering Aktiengesellschaft
    Inventors: Carsten Seilz, Dieter Hubl
  • Process for the production of 3-oxo-pregn-4-ene-21,17-carbolactones by the metal free oxidation of 17-(3-hydroxypropyl)-3,17-dihydroxyandrostanes
    Patent number: RE44734
    Abstract: This invention relates to processes for the production of 3-oxo-pregnane-21,17-carbolactones of formula II as well as 3-oxo-pregn-4-ene-21,17-carbolactones of formula III by the metal-free oxidation of 17-(3-hydroxypropyl)-3,17-dihydroxyandrostanes of formula I In addition, the invention relates to the dichloromethane hemisolvate of 6B,7B;15?,16?-diethylene-3-oxo-17?-pregnan-5?-ol-21,17-carbolactone (IV) as such.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: January 28, 2014
    Assignee: Bayer Intellectual Property GmbH
    Inventors: Carsten Seilz, Hartmut Seba