Patents by Inventor Tamara Ladduwahetty

Tamara Ladduwahetty 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: 5719147
    Abstract: Substituted heterocycles of the general structural formula: ##STR1## are tachykinin receptor antagonists useful in the treatment of inflammatory diseases, pain or migraine, asthma and emesis, and calcium channel blockers useful in the treatment of cardiovascular conditions such as angina, hypertension or ischemia.
    Type: Grant
    Filed: September 8, 1995
    Date of Patent: February 17, 1998
    Assignee: Merck & Co., Inc.
    Inventors: Conrad P. Dorn, Paul E. Finke, Jeffrey J. Hale, Malcolm MacCoss, Sander G. Mills, Shrenik K. Shah, Mark Stuart Chambers, Timothy Harrison, Tamara Ladduwahetty, Brian John Williams
  • Patent number: 5710161
    Abstract: The present invention relates to compounds of the formula (I): ##STR1## wherein Ar.sup.1 represents optionally substituted phenyl; Ar.sup.2 represents aryl; benzhydryl; or benzyl; wherein each aryl and heteroaryl and each phenyl moiety of benzyl and benzhydryl may be substituted;R.sup.1 represents H or a group of the formula Z-R.sup.2 ;R.sup.2 represents H, CO.sub.2 R.sup.7, CONR.sup.7 R.sup.8, NR.sup.7 R.sup.8, NR.sup.7 COR.sup.9, NR.sup.7 SO.sub.2 R.sup.8, trifluoromethyl, heteroaryl or --O-heteroaryl, each of which heteroaryl groups are as previously defined and may be optionally substituted, or R.sup.2 represents a group selected from phenyl, piperazinyl, piperidinyl, spiro-fused piperidinyl, tetrahydroquinolinyl or tetrahydroisoquinolinyl, each of which may be substituted;R.sup.3, R.sup.4, R.sup.5 and R.sup.6 each independently represent H or C.sub.1-4 alkyl;R.sup.7 and R.sup.8 each independently represent H, C.sub.
    Type: Grant
    Filed: September 12, 1995
    Date of Patent: January 20, 1998
    Assignee: Merck, Sharp & Dohme, Ltd.
    Inventors: Tamara Ladduwahetty, Angus Murray MacLeod
  • Patent number: 5693640
    Abstract: A class of pyridazino?4,5-b!indole-1,4-dione derivatives, substituted in the 2-position by an optionally substituted phenyl moiety, are selective non-competitive antagonists of NMDA receptors and/or are antagonists of AMPA receptors, and are therefore of utility in the treatment and/or prevention of conditions, such as neurodegenerative disorders, convulsions or schizophrenia, which require the administration of an NMDA and/or AMPA antagonist.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: December 2, 1997
    Assignee: Merck, Sharp & Dohme, Ltd.
    Inventors: Tamara Ladduwahetty, Angus Murray MacLeod
  • Patent number: 5637699
    Abstract: Substituted heterocycles of the general structural formula: ##STR1## are tachykinin receptor antagonists useful in the treatment of inflammatory diseases, pain or migraine, asthma and emesis, and calcium channel blockers useful in the treatment of cardiovascular conditions such as angina, hypertension or ischemia.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: June 10, 1997
    Assignee: Merck & Co., Inc.
    Inventors: Conrad P. Dorn, Jeffrey J. Hale, Paul E. Finke, Malcolm MacCoss, Sander G. Mills, Shrenik K. Shah, Mark S. Chambers, Timothy Harrison, Tamara Ladduwahetty, Brian J. Williams
  • Patent number: 5624947
    Abstract: Compounds of formula (I), or a salt or prodrug thereof are tachykinin antagonists.
    Type: Grant
    Filed: June 20, 1995
    Date of Patent: April 29, 1997
    Assignee: Merck, Sharp & Dohme Ltd.
    Inventors: Linda E. Keown, Tamara Ladduwahetty, Monique B. Van Niel
  • Patent number: 5496833
    Abstract: Compounds of formula (I), and salts and prodrugs thereof ##STR1## wherein n is 1, 2 or 3;X represents O or S;Y represents a hydrocarbon chain of 1, 2, 3 or 4 carbon atoms optionally substituted by oxo;R.sup.1 is phenyl optionally substituted by 1, 2 or 3 of C.sub.1-6 alkyl, C.sub.2-6 alkenyl, C.sub.2-6 alkynyl, halo, cyano, nitro, trifluoromethyl, trimethylsilyl, --OR.sup.a, SR.sup.a, SOR.sup.a, SO.sub.2 R.sup.a, --NR.sup.a R.sup.b, --NR.sup.a COR.sup.b, --NR.sup.a CO.sub.2 R.sup.b, --CO.sub.2 R.sup.a or --CONR.sup.a R.sup.b ;R.sup.2 is phenyl, indazolyl, thienyl, furyl, pyridyl, thiazolyl, tetrazolyl, quinolyl, benzhydryl, or benzyl;R.sup.4 and R.sup.5 each independently represent H, halo, C.sub.1-6 alkyl, oxo, CH.sub.2 OR.sup.a, CO.sub.2 R.sup.a or CONR.sup.a R.sup.b ;R.sup.8 represents an optionally substituted aromatic heterocycle; andR.sup.a and R.sup.b are H, trifluoromethyl, C.sub.1-6 alkyl or phenyl optionally substituted by C.sub.
    Type: Grant
    Filed: February 13, 1995
    Date of Patent: March 5, 1996
    Assignee: Merck Sharp & Dohme Limited
    Inventors: Reymond Baker, Tamara Ladduwahetty, Eileen M. Seward, Christopher J. Swain
  • Patent number: 5256671
    Abstract: Compounds of formula (I), and salts and prodrugs thereof: ##STR1## wherein Q is the residue of an optionally substituted azabicyclic ring system;the dotted line represents an optional double bond;X represents H, --OH, .dbd.O or halo;R.sup.1 represents H, phenyl or thienyl, which phenyl or thienyl groups may be optionally substituted by halo or trifluoromethyl;R.sup.2 represents phenyl, thienyl or benzyl, any of which groups may be optionally substituted by halo or trifluoromethyl; andR.sup.3, R.sup.4 and R.sup.5 independently represent H, C.sub.1-6 alkyl, C.sub.2-6 alkenyl, C.sub.2-6 alkynyl, halo, cyano, nitro, trifluoromethyl, trimethylsilyl, --OR.sup.a, SR.sup.a, SOR.sup.a, SO.sub.2 R.sup.a, --NR.sup.a R.sup.b, --NR.sup.a COR.sup.b, --NR.sup.a CO.sub.2 R.sup.b, --CO.sub.2 R.sup.a or --CONR.sup.a R.sup.b ; andR.sup.a and R.sup.b independently represent H, C.sub.1-6 alkyl, phenyl or trifluoromethyl, are tachykinin receptor antagonists. They and compositions thereof are useful in therapy.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: October 26, 1993
    Assignee: Merck Sharp & Dohme, Limited
    Inventors: Tamara Ladduwahetty, Christopher J. Swain
  • Patent number: 4759880
    Abstract: A series of alkanoarachidonic acids have been prepared as modulators of the arachidonic acid cascade to increase the production of biologically desirable compounds and minimize the production of biologically undesirable compounds. Examples of desirable compounds in this respect comprise postaglandins and thromboxanes whereas undesirable compounds comprise the mono- and polyhydroxyarachidonic acids and leukotrienes. The alkanoarachidonic acids and their intermediates are of the general formula: ##STR1## and at least one of X, Y, and Z is lower alkano and is hydrogen when not lower alkano; the esters and salts of the acids are also prepared. The acids, esters and salts may be used as anti-anaphylaxis or anti-thrombosis agents.
    Type: Grant
    Filed: September 27, 1984
    Date of Patent: July 26, 1988
    Assignee: Research Corporation
    Inventors: Kyriacos C. Nicolaou, Nicos A. Petasis, Wen-Sen Li, Tamara Ladduwahetty, Jared L. Randall, Stephen E. Webber, Pedro E. Hernandez