Patents by Inventor Randy Stuart Muth

Randy Stuart Muth 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: 6066740
    Abstract: The present invention provides a process for making 2-amino-2-imidazoline, guanidine, and 2-amino-3,4,5,6-tetrahydroyrimidine derivatives by preparing the corresponding activated 2-thio-subsituted-2-derivative in a two-step, one-pot procedure and by further reacting yields this isolated derivative with the appropriate amine or its salts in the presence of a proton source. The present process allows for the preparation of 2-amino-2-imidazolines, quanidines, and 2-amino-3,4,5,6-tetrahydropyrimidines under reaction conditions that eliminate the need for lengthy, costly, or multiple low yielding steps, and highly toxic reactants. This process allows for improved yields and product purity and provides additional synthetic flexibility.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: May 23, 2000
    Assignee: The Procter & Gamble Company
    Inventors: Michael Selden Godlewski, Sean Rees Klopfenstein, Sreenivasa Reddy Mundla, William Lee Seibel, Randy Stuart Muth
  • Patent number: 5849889
    Abstract: The present invention relates to new 14-aminosteroids, pharmaceutical compositions containing the new compounds and methods of treatment for humans or other mammals afflicted with congestive heart failure.
    Type: Grant
    Filed: February 20, 1997
    Date of Patent: December 15, 1998
    Assignee: The Procter & Gamble Company
    Inventors: Paul Michael Dybas, Roland Norman Johnson, Randy Stuart Muth, Song Liu, David Edward Portlock
  • Patent number: 5783677
    Abstract: The present invention relates to a method for making a compound of the structure: ##STR1## comprising the steps: (a) adding 6-deoxy-.alpha.-L-mannopyranosyl bromide, 2,3,4-tri-O-benzoate; DMSO; a base, selected from the group including tertiary amines, amidines, bicarbonates, carbonates, heteroaryl amine, and a solvent, hydrocarbons, esters, and ethers, in a slurry heated to 50.degree.-150.degree. C.;(b) stirring the reaction mixture at 50.degree.-150.degree. C. for 5 minutes to 30 minutes,(c) pouring the reaction mixture over ice water; and(d) extracting the product with a solvent selected from the group consisting of chlorinated solvents, aromatic hydrocarbons, esters, ethers, and evaporating said layer to give a solid.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: July 21, 1998
    Assignee: Procter & Gamble Pharmaceuticals, Inc.
    Inventors: Song Liu, David Edward Portlock, Gilles Yves Genain, Jean-Jacques Koenig, Jacques de Rostolan, Randy Stuart Muth
  • Patent number: 5710259
    Abstract: The present invention relates to oligosaccharide-containing 14-aminosteroid compounds and the pharmaceutically-acceptable acid salts or esters thereof of the general formula: ##STR1## wherein a) R.sub.1 is(i) COOR.sub.5, whereR.sub.5 is hydrogen, a 1-6 carbon lower alkyl; a 1-6 carbon lower alkyl substituted by an amino group; an arylalkyl or heteroarylalkyl or a carbocyclic ring, or(ii) CHR.sub.6 OH, whereR.sub.6 is a hydrogen atom or 1-6 carbon lower alkyl group, or(iii) COR'", where R'" is hydrogen; 1-6 carbon lower alkyl; 1-6 carbon lower alkyl substituted amino; amino or dialkylamino; andb) R.sub.2 is --NR.sub.7 R.sub.8, whereR.sub.7 and R.sub.8, which may be the same or different, are hydrogen atoms or a 1-6 carbon lower alkyl; andc) R.sub.3 is an oligosaccharide sugar residue; andd) R.sub.4 is(i) OH, or(ii) H, or(iii) OR.sub.13, whereR.sub.13 is a monosaccharide sugar residue; acetoxy; benzoxy; arylalkyl or heteroarylalkyl; ande) Z is(i) --CH--, wherea and b are single bonds, or(ii) .dbd.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: January 20, 1998
    Assignee: The Procter & Gamble Company
    Inventors: Paul Michael Dybas, Roland Norman Johnson, Randy Stuart Muth, Song Liu