Carbon Bonded Directly At The 1-, 2- Or 4-position Patents (Class 552/571)
  • Substituted anthracenes
    Patent number: 7998540
    Abstract: The invention relates to novel 9- and/or 10-substituted anthracenes, to their use in liquid crystal, light-emitting or semiconducting materials and devices, in anisotropic polymers, optical, electrooptical, decorative, security, cosmetic, diagnostic, electric, electronic, charge transport, semiconductor, optical recording, electroluminescent, photoconductor or electrophotographic applications, and to liquid crystal, light-emitting and semiconducting materials, polymers and devices comprising them.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: August 16, 2011
    Assignee: Merck Patent Gesellschaft mit Beschrankter Haftung
    Inventors: Mark John Goulding, Marcus Thompson, Warren Duffy, Martin Heeney, Iain McCulloch
  • Method of preparation of ester derivatives of steroids
    Patent number: 5710293
    Abstract: The present invention relates to a method of using a perchloric acid catalyzed reaction to make acyl derivatives of norprogesterone compounds and, in particular, 16-methylene-17.alpha.-hydroxy-19-norpregn-4-ene-3,20-dione.
    Type: Grant
    Filed: October 13, 1995
    Date of Patent: January 20, 1998
    Assignee: The Population Council, Center for Biomedical Research
    Inventor: Fang Li
  • Process for preparation of 9.alpha. -chloro-11.beta. formyloxypregna-3.20-diones
    Patent number: 5670676
    Abstract: Disclosed is a process for producing a compound of the formula: ##STR1## by reacting a compound of the formula: ##STR2## with: (1) a chlorinating reagent selected from an N-chloroimide or an N-chloroamide; (2) an anhydrous strong acid selected from orthophosphoric acid, alkylsulfonic acids, fluoroalkylsulfonic acids or arylsulfonic acids; and (3) anhydrous dimethylformamide; at a temperature within the range of about -78.degree. to about 0.degree. C.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: September 23, 1997
    Assignee: Schering Corporation
    Inventors: Richard W. Draper, Eugene J. Vater
  • Process for steroid preparation
    Patent number: 5352808
    Abstract: A process for the preparation of a compound of the formula ##STR1## wherein R.sub.1 is selected from the group consisting of hydrogen, alkyl of 1 to 4 carbon atoms optionally substituted by halogen or a nitrogen or oxygen function and alkenyl and alkynyl of 2 to 4 carbon atoms, R.sub.2 is alkyl of 1 to 4 carbon atoms and the A, B, C and D rings are optionally substituted by at least one member of the group consisting of optionally protected --OH or .dbd.0, halogen, alkyl and alkoxy of 1 to 4 carbon atoms and alkenyl and alkynyl of 2 to 4 carbon atoms comprising reacting a compound of the formula ##STR2## wherein R.sub.1 and R.sub.2 and the A, B, C and D rings are defined as above with an oxidizing agent in the presence of water and an at least partially water-miscible solvent to obtain a compound of the formula ##STR3## wherein R.sub.1 and R.sub.
    Type: Grant
    Filed: November 5, 1992
    Date of Patent: October 4, 1994
    Assignee: Roussel Uclaf
    Inventors: Jean Buendia, Michel Vivat