Patents by Inventor Steven A. Weissman

Steven A. Weissman 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).

  • Publication number: 20060106223
    Abstract: A practical, ligand-free cyanation of aryl bromides employs Pd catalyst in combination with a non-toxic cyanide source, Mn[Fe(CN)6] (M=K or Na; n is 3 or 4), or a hydrate thereof, and a base. The reactions are performed in a polar aprotic solvents and provide the corresponding aryl nitrile in 83-96% yield, typically in less than 5 h.
    Type: Application
    Filed: November 14, 2005
    Publication date: May 18, 2006
    Inventor: Steven Weissman
  • Publication number: 20060014950
    Abstract: This invention relates to a process for making spirolactone compounds analogous to formula I.
    Type: Application
    Filed: October 14, 2003
    Publication date: January 19, 2006
    Inventors: Ralph Volante, David Tschaen, Steven Weissman, Mathew Heileman, Toshiaki Mase, Takehiko Iida, Kenji Maeda, Toshihiro Wada, Hiroki Sato, Kenichi Asakawa
  • Publication number: 20040116688
    Abstract: The present invention relates to a novel process to make indolocarbazole glycosides in high purity which inhibit the growth of tumor cells and are therefore useful in the treatment of cancer in mammals, and the like.
    Type: Application
    Filed: September 25, 2003
    Publication date: June 17, 2004
    Inventors: Steven Weissman, David Tschaen, Asayuki Kamatani, Shouichi Hiraga, Masashi Kawasaki, Takehiko Iida
  • Publication number: 20040024196
    Abstract: The present invention relates to a novel glycosidation process to make intermediates useful in the preparation of indolopyrrolocarbazole derivatives which inhibit the growth of tumor cells and are therefore useful in the treatment of cancer in mammals, and the like.
    Type: Application
    Filed: July 31, 2003
    Publication date: February 5, 2004
    Inventors: Daniel E Petrillo, Steven A. Weissman, Shouichi Hiraga, Nobuya Satake, Kai Rossen
  • Patent number: 6559299
    Abstract: The present invention relates to a novel process to make indolocarbazole glycosides in high purity which inhibit the growth of tumor cells and are therefore useful in the treatment of cancer in mammals, and the like.
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: May 6, 2003
    Assignees: Merck & Co., Inc., Banyu Pharmaceutical Co., Ltd.
    Inventors: Steven Weissman, David Tschaen, Asayuki Kamatani, Shouichi Hiraga, Masashi Kawasaki, Takehiko Iida
  • Patent number: 6555677
    Abstract: The present invention relates to a novel glycosidation process to make intermediates useful in the preparation of indolopyrrolocarbazole derivatives which inhibit the growth of tumor cells and are therefore useful in the treatment of cancer in mammals, and the like.
    Type: Grant
    Filed: October 22, 2001
    Date of Patent: April 29, 2003
    Assignee: Merck & Co., Inc.
    Inventors: Daniel E. Petrillo, Steven A. Weissman, Shouichi Hiraga, Nobuya Satake, Kai Rossen
  • Publication number: 20020193324
    Abstract: The present invention relates to a novel process to make indolocarbazole glycosides in high purity which inhibit the growth of tumor cells and are therefore useful in the treatment of cancer in mammals, and the like.
    Type: Application
    Filed: March 21, 2002
    Publication date: December 19, 2002
    Inventors: Steven Weissman, David Tschaen, Asayuki Kamatani, Shouichi Hiraga, Masashi Kawasaki, Takehiko Iida
  • Publication number: 20020058803
    Abstract: The present invention relates to a novel glycosidation process to make intermediates useful in the preparation of indolopyrrolocarbazole derivatives which inhibit the growth of tumor cells and are therefore useful in the treatment of cancer in mammals, and the like.
    Type: Application
    Filed: October 22, 2001
    Publication date: May 16, 2002
    Inventors: Daniel E. Petrillo, Steven A. Weissman, Shouichi Hiraga, Nobuya Satake, Kai Rossen
  • Patent number: 6372911
    Abstract: A process for preparing a &bgr;-hydroxy carbamate product is disclosed. The process comprises reacting an olefin compound containing at least one carbon-carbon double bond with a carbamate in an aqueous solvent and in the presence of a base, an osmium catalyst, a co-oxidant selected from a halohydantoin, a haloisocyanuric acid, and an alkali metal salt of a haloisocyanuric acid, and optionally an asymmetric ligand, to form a reaction mixture containing the &bgr;-hydroxy carbamate product. The process optionally further comprises treating the &bgr;-hydroxy carbamate product with additional base to form an oxazolidinone. The oxazolidinones are useful as chiral auxiliary agents and as intermediates for the formation of pharmaceutically active substances such as alpha 1 a adrenergic receptor antagonists. A process for preparing nitrogen-functionalized derivatives of the oxazolidinones is also disclosed.
    Type: Grant
    Filed: January 13, 2000
    Date of Patent: April 16, 2002
    Assignee: Merck & Co., Inc.
    Inventors: Nancy Barta, Robert D. Larsen, Daniel R. Sidler, Steven A. Weissman
  • Patent number: 6160118
    Abstract: The present invention is directed to a process for synthesizing substituted piperazinones, which are useful intermediates for making farnesyl-protein transferase inhibitors, using a Mitsunobu reaction.
    Type: Grant
    Filed: June 23, 1999
    Date of Patent: December 12, 2000
    Assignee: Merck & Co., Inc.
    Inventors: David Askin, Stephanie Lewis, Steven A. Weissman
  • Patent number: 5728840
    Abstract: A process for synthesizing the epoxide of the formula ##STR1## consists of, at a minimum, formation of a halohydrin from the allyl acetonide reactat, followed by base-induced cyclization, the epoxide product I being useful as an intermediate for the synthesis of inhibitors of renin or HIV protease or other proteases.
    Type: Grant
    Filed: August 8, 1995
    Date of Patent: March 17, 1998
    Assignee: Merck & Co., Inc.
    Inventors: David Askin, Kan K. Eng, Peter E. Maligres, Paul J. Reider, Kai Rossen, Ralph P. Volante, Veena Upadhyay, Steven A. Weissman
  • Patent number: 5723615
    Abstract: An improved process using chiral hydrogenation is described for the synthesis in high yields of a 4-protected-(S)-piperazine-2-tert-butyl-carboxamide, an intermediate for an HIV protease inhibitor.
    Type: Grant
    Filed: June 18, 1996
    Date of Patent: March 3, 1998
    Assignee: Merck & Co., Inc.
    Inventors: Kai Rossen, Steven A. Weissman, Jess Sager, David Askin, Paul J. Reider, Ralph P. Volante
  • Patent number: 5248817
    Abstract: A novel procedure for bromination of aromatic moieties utilizes N-bromosuccinimide or dibromodimethylhydantoin in an aqueous alkali medium. The bromination procedure is employed for the preparation of an intermediate used in the preparation of remoxipride, an antipsychotic compound.
    Type: Grant
    Filed: July 8, 1992
    Date of Patent: September 28, 1993
    Assignee: Merck & Co., Inc.
    Inventors: Joseph Auerbach, Steven A. Weissman