Patents by Inventor Bruce E. Witzel

Bruce E. Witzel 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: 5710275
    Abstract: Described are new 7.beta.-substituted 4-aza-5.alpha.-androstan-3-ones and related compounds as 5.alpha.-reductase inhibitors.
    Type: Grant
    Filed: April 3, 1995
    Date of Patent: January 20, 1998
    Assignee: Merck & Co., Inc.
    Inventors: Raman K. Bakshi, Gary H. Rasmusson, Richard L. Tolman, Gool F. Patel, Georgianna S. Harris, Donald W. Graham, Bruce E. Witzel
  • Patent number: 5693809
    Abstract: Described are new 16-substituted and 7,16-disubstituted 4-aza-5.alpha.-androstan-3-ones and related compounds as 5.alpha.-reductase inhibitors.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: December 2, 1997
    Assignee: Merck & Co., Inc.
    Inventors: Philippe L. Durette, William Hagmann, Gary H. Rasmusson, Richard L. Tolman, Ihor E. Kopka, Soumya P. Sahoo, Craig K. Esser, Nathan G. Steinberg, Donald W. Graham, Bruce E. Witzel
  • Patent number: 5639741
    Abstract: Novel amino substituted 4-azasteroid 5.alpha.-reductase inhibitors of formula (I). ##STR1## wherein A is (a), (b) or (c), are claimed as well as pharmaceutically acceptable salts and formulations thereof. These compounds are effective in inhibiting testosterone 5.alpha.-reductase(s) and are thus useful in the treatment of a number of hyperandrogenic conditions including benign prostatic hypertrophy, acne, seborrhea, female hirsutism, and male and female pattern baldness (alopecia).
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: June 17, 1997
    Assignee: Merck & Co., Inc.
    Inventors: Bruce E. Witzel, Jeffrey P. Bergman, Richard L. Tolman
  • Patent number: 5620986
    Abstract: Novel substituted 4-azasteroid 5-.alpha.-reductase inhibitors of formula (I), wherein A is (a), (b) or (c), are claimed as well as pharmaceutically acceptable salts and formulations thereof. These compounds are effective inhibitors of testosterone 5.alpha.-reductase(s) and are thus useful in the treatment of a number of hyperandrogenic conditions including benign prostatic hypertrophy, acne, seborrhea, female hirsutism, and male and female pattern baldness (alopecia).
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: April 15, 1997
    Assignee: Merck & Co., Inc.
    Inventors: Bruce E. Witzel, Richard L. Tolman
  • Patent number: 5610162
    Abstract: Compounds of Formula (I), ##STR1## wherein X is sulfur or oxygen are inhibitors of the 5.alpha.-reductase enzyme and isozymes thereof. The compounds are useful for the treatment of hyperandrogenic disease conditions and diseases of the skin and scalp.
    Type: Grant
    Filed: November 17, 1994
    Date of Patent: March 11, 1997
    Assignee: Merck & Co., Inc.
    Inventors: Bruce E. Witzel, Gary H. Rasmusson, Richard L. Tolman, Shu Shu Yang
  • Patent number: 5536727
    Abstract: Compounds of Formula I ##STR1## wherein Z contains an ether or thioether moeity, are inhibitors of the 5.alpha.-reductase enzyme and isozymes thereof. The compounds are useful for the treatment of hyperandrogenic disease conditions and diseases of the skin and scalp.
    Type: Grant
    Filed: November 17, 1994
    Date of Patent: July 16, 1996
    Assignee: Merck & Co., Inc.
    Inventors: Bruce E. Witzel, Richard L. Tolman, Gary H. Rasmusson, Raman K. Bakshi, Shu Shu Yang
  • Patent number: 5068248
    Abstract: Method for increasing resistance to gastro-intestinal irritation, and for the treatment of pain, fever, inflammation, arthritic conditions, asthma, allergic disorders, skin diseases, cardiovascular disorders, psoriasis, inflammatory bowel disease, glaucoma or other prostaglandin and/or leukotriene mediated diseases comprising the administration to a subject in need of such treatment, a non-toxic therapeutically effective amount of compound of formula I: ##STR1##
    Type: Grant
    Filed: June 22, 1989
    Date of Patent: November 26, 1991
    Assignee: Merck & Co., Inc.
    Inventors: Allan N. Tischler, Philippe L. Durette, Bruce E. Witzel, Kathleen M. Rupprecht, Timothy F. Gallagher, Marvin M. Goldenberg, Debra L. Allison
  • Patent number: 4999436
    Abstract: Aryl substituted thiophenes 3-ols, its dihydro derivatives, 1-oxide and 1,1-dioxide analogs, as well as aryl substituted furans, are 5-lipoxygenase inhibitors useful in the treatment of inflammation and other leukotriene-mediated diseases.
    Type: Grant
    Filed: August 22, 1989
    Date of Patent: March 12, 1991
    Assignee: Merck & Co., Inc.
    Inventors: Bruce E. Witzel, Debra L. Allison, Charles G. Caldwell, Kathleen Rupprecht
  • Patent number: 4885276
    Abstract: New cyclosporin analogs with modified "C-9 amino acids" have been made and are found to be effective immunosuppressive agents.
    Type: Grant
    Filed: October 24, 1988
    Date of Patent: December 5, 1989
    Assignee: Merck & Co., Inc.
    Inventor: Bruce E. Witzel
  • Patent number: 4814501
    Abstract: Pyrolysis of substituted salicylate O(N,N-dialkyl)thiocarbamates yielded the corresponding N,N-dialkyl-2-(methylthio)benzamide. Similarly, substituted 6-azasalicylate O(N,N-dialkyl)thiocarbamates yielded the corresponding N,N-dialkyl-2-(methylthio)-6-aza-benzamide.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: March 21, 1989
    Assignee: Merck & Co., Inc.
    Inventors: Bruce E. Witzel, Robert K. Baker, Philippe L. Durette, Robert A. Frankshun
  • Patent number: 4800211
    Abstract: 3-Hydroxybenzo[b]thiophene-2-carboxamide derivatives have been prepared by:(1) treating a substituted 2-halobenzoate with a thioacetamide.(2) treating a substituted thiosalicylate with an appropriately substituted haloacetamide; and(3) further synthetic modification of compounds prepared above.These compounds have been found to be effective inhibitors of both cyclooxygenase and lipoxygenase and thereby useful in the treatment of pain, fever, inflammation, arthritic conditions, asthma, allergic disorders, skin diseases, cardiovascular disorders, psoriasis, inflammatory bowel disease, glaucoma or other prostaglandins and/or leukotriene mediated diseases.
    Type: Grant
    Filed: August 18, 1986
    Date of Patent: January 24, 1989
    Assignee: Merck & Co., Inc.
    Inventors: Allan N. Tischler, Philippe L. Durette, Bruce E. Witzel, Thomas J. Lanza, Jr.
  • Patent number: 4798823
    Abstract: New cyclosporin analogs with modified "C-9 amino acids" have been made and are found to be effective immunosuppressive agents.
    Type: Grant
    Filed: June 3, 1987
    Date of Patent: January 17, 1989
    Assignee: Merck & Co., Inc.
    Inventor: Bruce E. Witzel
  • Patent number: 4782080
    Abstract: N-Alkenyl-2-hydroxybenzo[b]thiophene-3-carboxamide derivatives are prepared via treatment of the corresponding unsubstituted carboxamide with appropriate agents, such as aldehydes, ketones, enol ethers, epoxides, acetals or ketals.These compounds have been found to be effective inhibitors of both cyclooxygenase and lipoxygenase and thereby useful in the treatment of pain, fever, inflammation, arthritic conditions, asthma, allergic disorders, skin diseases, cardiovascular disorders, psoriasis, inflammatory bowel disease, glaucoma or other prostaglandins and/or leukotriene mediated diseases.
    Type: Grant
    Filed: September 16, 1985
    Date of Patent: November 1, 1988
    Assignee: Merck & Co., Inc.
    Inventor: Bruce E. Witzel
  • Patent number: 4760086
    Abstract: N-Alkenyl-3-hydroxybenzo[b]thiophene-2-carboxamide derivatives have been prepared by:(1) treating a substituted 2-halobenzoate with thioacetamide followed by N-alkenylation with appropriate agents, such as aldehydes, ketones, enol ethers, epoxides, acetals or ketals;(2) treating a substituted thiosalicylate with an appropriately substituted haloacetamide, followed by dehydration; and(3) further synthetic modification of compounds prepared above.These compounds have been found to be effective inhibitors of both cyclooxygenase and lipoxygenase and thereby useful in the treatment of pain, fever, inflammation, arthritic conditions, asthma, allergic disorders, skin diseases, cardiovascular disorders, psoriasis, inflammatory bowel disease, glaucoma or other prostaglandins and/or leukotriene mediated diseases.
    Type: Grant
    Filed: February 27, 1985
    Date of Patent: July 26, 1988
    Assignee: Merck & Co., Inc.
    Inventors: Allan N. Tischler, Bruce E. Witzel, Philippe L. Durette, Kathleen M. Rupprecht, Timothy F. Gallagher, Debra L. Allison, Marvin M. Goldenberg
  • Patent number: 4720503
    Abstract: N-substituted fused-heterocyclic carboxamide derivatives, for example, N-(2,2-diphenylethenyl)-3-hydroxythieno[3,2-b]thiophene-2-carboxamide can be prepared by ring closure between an appropriately substituted halo-thiophene ester, e.g., methyl 3-bromo-thiophene-2-carboxylate, and mercaptoacetamide followed by condensation with diphenylacetaldehyde. Alternatively, the ring closure can be carried out between an appropriately substituted mercaptothiophene ester, e.g., methyl 3-mercaptothiophene-2-carboxylate and a haloacetamide to afford the fused-heterocyclic intermediate, 3-hydroxythieno[3,2-b]thiophene-2-carboxamide. N-alkenylation of the intermediate will then lead to the final products.
    Type: Grant
    Filed: August 2, 1985
    Date of Patent: January 19, 1988
    Assignee: Merck & Co., Inc.
    Inventors: Bruce E. Witzel, Allan N. Tischler, Debra L. Allison
  • Patent number: 4663344
    Abstract: 3-Hydroxybenzo[b]thiophene derivatives, such as 2-aralkyl, 2-alkyl and 2-alkenyl-3-hydroxybenzo[b]-thiophenes, were prepared by, among other methods, ring closure of 2-(2-carboxy-phenylthio)-.alpha.-substituted acetic acids. These compounds are found to be useful in the treatment of pain, fever, inflammation, arthritic conditions, asthma, allergic disorders, skin diseases, cardiovascular disorders, psoriasis, inflammatory diseases and other prostaglandin and/or leukotriene mediated diseases.
    Type: Grant
    Filed: March 11, 1985
    Date of Patent: May 5, 1987
    Assignee: Merck & Co., Inc.
    Inventors: Philippe L. Durette, Bruce E. Witzel, Kathleen M. Rupprecht, Allan N. Tischler, Timothy F. Gallagher
  • Patent number: 4536512
    Abstract: New 5-(2,3-dihydro-1H-pyrrolizin-5-oyl)-, 5-(2,3-dihydro-1H-pyrrolo[2,1-b]thiazol-5-oyl)-, 5-(2,3-dihydro-1H-pyrrolo[2,1-b]imidazol-5-oyl)-, and 5-(2,3-dihydro-1H-pyrrolo[2,1-b]oxazol-5-oyl)-derivatives of substituted 2,3-dihydro-1H-pyrrolizine-1-alkanoic or carboxylic acids have been prepared. They are found to be effective inhibitors of platelet aggregation and are analgesic/anti-inflammatory agents with low ulcerogenic side effects.
    Type: Grant
    Filed: October 8, 1982
    Date of Patent: August 20, 1985
    Assignee: Merck & Co., Inc.
    Inventors: Tesfaye Biftu, Bruce E. Witzel, Peter L. Barker
  • Patent number: 4533671
    Abstract: New 5-(2,3-dihydro-1H-pyrrolizin-5-oyl)-, 5-(2,3-dihydro-1H-pyrrolo[2,1-b]thiazol-5-oyl)-, 5-(2,3-dihydro-1H-pyrrolo[2,1-b]imidazol-5-oyl)-, and 5-(2,3-dihydro-1H-pyrrolo[2,1-b]oxazol-5-oyl)-pyrrole-2-alkanoic acid derivatives have been prepared. They are found to be effective inhibitors of platelet aggregation and are analgesic and anti-inflammatory agents with low ulcerogenic side effects.
    Type: Grant
    Filed: October 8, 1982
    Date of Patent: August 6, 1985
    Assignee: Merck & Co., Inc.
    Inventors: Tesfaye Biftu, Bruce E. Witzel, Peter L. Barker
  • Patent number: 4440779
    Abstract: Tricyclic derivatives of substituted pyrrole acids, e.g., substituted 4,10-dihydro-10-oxo-1H-[1]benzoxepino[4,3-b]pyrrole-2-acetic acids or the 5-thia analogs thereof have been prepared via hydrolysis of a precursor or decarboxylation of a precursor-diacid. These tricyclic compounds are found to have high analgesic and anti-inflammatory activities but low ulcerogenic side effects.
    Type: Grant
    Filed: June 4, 1982
    Date of Patent: April 3, 1984
    Assignee: Merck & Co., Inc.
    Inventors: James B. Doherty, Conrad P. Dorn, Bruce E. Witzel, Debra L. Allison, Tsung-Ying Shen
  • Patent number: 4431655
    Abstract: 2,4-Disubstituted-1,2,5-thiadiazol-3(2H)-one antimicrobials have broad spectrum antibacterial and antifungal activity. They are found to be especially useful in agriculture to protect plants against diseases such as leaf, stem, and fruit spotting, internal discoloration and decay of fruits and vegetables. These compounds are particularly active against diseases caused by the genera Pseudomonas, Xanthomonas, Erwinia, and Corynebacterium.
    Type: Grant
    Filed: July 12, 1982
    Date of Patent: February 14, 1984
    Assignee: Merck & Co., Inc.
    Inventors: Richard A. Dybas, Bruce E. Witzel, Nathaniel Grier