Patents by Inventor Chris Hugh Senanayake

Chris Hugh Senanayake 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: 20040266767
    Abstract: Disclosed is a process of making compounds of formula(I): 1
    Type: Application
    Filed: June 30, 2004
    Publication date: December 30, 2004
    Applicant: Boehringer Ingelheim Pharmaceuticals, Inc.
    Inventors: Nizar Haddad, Xudong Wei, Chris Hugh Senanayake, Jinghua Xu, Nathan Yee
  • Patent number: 6780891
    Abstract: Compounds of formula I are effective in treating disorders modulated by opiate receptor activity and/or monoamine activity. In formula I, R1 is selected from alkyl, aryl, alkylaryl, substituted alkyl, substituted aryl, and substituted alkylaryl; R2 is selected from hydrogen, hydroxy, cyano, haloalkyl, glycosyl, SO2R5, and OR5; R3 and R4 are independently selected from hydrogen and lower alkyl, or R3 and R4 taken together with nitrogen form a five- or six-membered heterocyclic or substituted heterocyclic ring; and R5 is selected from alkyl, aryl, alkylaryl, substituted alkyl, substituted aryl, and substituted alkylaryl.
    Type: Grant
    Filed: December 2, 2002
    Date of Patent: August 24, 2004
    Assignee: Sepracor Inc.
    Inventors: Chris Hugh Senanayake, Thomas P. Jerussi, Paul T. Grover, Qun Kevin Fang, Mark Currie
  • Publication number: 20040087660
    Abstract: This invention encompasses novel methods of preparing sibutramine and sibutramine derivatives, and stereomerically pure sibutramine derivatives in particular. Examples of sibutramine derivatives include, but are not limited to, sibutramine metabolites such as desmethylsibutramine and didesmethylsibutramine. The invention further encompasses novel compounds useful in the synthesis of sibutramine derivatives.
    Type: Application
    Filed: August 20, 2003
    Publication date: May 6, 2004
    Applicant: Sepracor Inc.
    Inventors: Chris Hugh Senanayake, Zhengxu Han, Dhileepkumar Krishnamurthy, Derek Pflum
  • Publication number: 20030171440
    Abstract: Compounds of formula I are effective in treating disorders modulated by opiate receptor activity and/or monoamine activity.
    Type: Application
    Filed: December 2, 2002
    Publication date: September 11, 2003
    Applicant: SEPRACOR INC.
    Inventors: Chris Hugh Senanayake, Thomas P. Jerussi, Paul T. Grover, Qun Kevin Fang, Mark Currie
  • Patent number: 6610887
    Abstract: This invention encompasses novel methods of preparing sibutramine and sibutramine derivatives, and stereomerically pure sibutramine derivatives in particular. Examples of sibutramine derivatives include, but are not limited to, sibutramine metabolites such as desmethylsibutramine and didesmethylsibutramine. The invention further encompasses novel compounds useful in the synthesis of sibutramine derivatives.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: August 26, 2003
    Assignee: Sepracor Inc.
    Inventors: Chris Hugh Senanayake, Zhengxu Han, Dhileepkumar Krishnamurthy, Derek Pflum
  • Publication number: 20030083517
    Abstract: This invention encompasses novel methods of preparing sulfinamides and sulfoxides, particularly stereomerically pure sulfinamides and sulfoxides. The invention further encompasses novel compounds from which sulfinamides and sulfoxides can be prepared.
    Type: Application
    Filed: April 12, 2002
    Publication date: May 1, 2003
    Inventors: Chris Hugh Senanayake, Zhengxu Han, Dhileepkumar Krishnamurthy, Derek Pflum, Harold Scott Wilkinson
  • Publication number: 20020183554
    Abstract: This invention encompasses novel methods of preparing sibutramine and sibutramine derivatives, and stereomerically pure sibutramine derivatives in particular. Examples of sibutramine derivatives include, but are not limited to, sibutramine metabolites such as desmethylsibutramine and didesmethylsibutramine. The invention further encompasses novel compounds useful in the synthesis of sibutramine derivatives.
    Type: Application
    Filed: April 12, 2002
    Publication date: December 5, 2002
    Inventors: Chris Hugh Senanayake, Zhengxu Han, Dhileepkumar Krishnamurthy, Derek Pflum
  • Patent number: 6376684
    Abstract: A process for preparing an alkyl phenylglycolic acid is disclosed. It follows the sequence of condensing a substituted acetaldehyde with mandelic acid to provide a 5-phenyl-1,3-dioxolan-4-one, which is condensed with an alkyl ketone or aldehyde to provide a 5-(1-hydroxyalkyl)-5-phenyl-1,3-dioxolan-4-one, which is dehydrated to a 5-(1-alkenyl)-5-phenyl-1,3-dioxolan-4-one. The 5-(1-alkenyl)-5-phenyl-1,3-dioxolan-4-one may be hydrolyzed and reduced to an &agr;-alkylphenylglycolic acid or the hydrolysis and reduction steps may be reversed. The process enables the production of single enantiomers of cyclohexylphenylglycolic acid (CHPGA). An analogous process for racemic CHPGA is disclosed employing racemic mandelic acid and acetone. Novel intermediates in the process are also disclosed.
    Type: Grant
    Filed: November 13, 2000
    Date of Patent: April 23, 2002
    Assignee: Sepracor Inc.
    Inventors: Chris Hugh Senanayake, Paul T. Grover
  • Patent number: 6303145
    Abstract: A method and composition are disclosed utilizing the pure (S,R) isomer of formoterol, which is a bronchodilator with reduced adverse effects. (S,R)-Formoterol may be conveniently and safely formulated for aerosol administration.
    Type: Grant
    Filed: May 10, 1999
    Date of Patent: October 16, 2001
    Assignee: Sepracor Inc.
    Inventors: Thomas P. Jerussi, Chris Hugh Senanayake
  • Patent number: 6268533
    Abstract: A method is disclosed for the preparation of optically pure isomers of formoterol by the reaction of an optically pure 4-benzyloxy-3-formamidostyrene oxide with an optically pure 4-methoxy-&agr;-methyl-N-(phenylmethyl)benzeneethanamine followed by debenzylation. Useful intermediates in the process are also disclosed, as are the novel L-tartrate salt of R,R-formoterol and pharmaceutical compositions thereof.
    Type: Grant
    Filed: January 27, 2000
    Date of Patent: July 31, 2001
    Assignee: Sepracor Inc.
    Inventors: Yun Gao, Robert Hett, Kevin Q. Fang, Stephen A. Wald, Chris Hugh Senanayake
  • Publication number: 20010007679
    Abstract: A method and composition are disclosed utilizing the pure (S,R) isomer of formoterol, which is a bronchodilator with reduced adverse effects. (S,R)-Formoterol may be conveniently and safely formulated for aerosol administration.
    Type: Application
    Filed: May 10, 1999
    Publication date: July 12, 2001
    Inventors: THOMAS P. JERUSSI, CHRIS HUGH SENANAYAKE
  • Patent number: 6180823
    Abstract: A process for preparing an alkyl phenylglycolic acid is disclosed. It follows the sequence of condensing a substituted acetaldehyde with mandelic acid to provide a 5-phenyl-1,3-dioxolan-4-one, which is condensed with an alkyl ketone or aldehyde to provide a 5-(1-hydroxyalkyl)-5-phenyl-1,3-dioxolan-4-one, which is dehydrated to a 5-(1-alkenyl)-5-phenyl-1,3-dioxolan-4-one. The 5-(1-alkenyl)-5-phenyl-1,3-dioxolan-4-one may be hydrolyzed and reduced to an &agr;-alkylphenylglycolic acid or the hydrolysis and reduction steps may be reversed. The process enables the production of single enantiomers of cyclohexylphenylglycolic acid (CHPGA). An analogous process for racemic CHPGA is disclosed employing racemic mandelic acid and acetone. Novel intermediates in the process are also disclosed.
    Type: Grant
    Filed: November 6, 1998
    Date of Patent: January 30, 2001
    Assignee: Sepracor Inc.
    Inventors: Chris Hugh Senanayake, Paul T. Grover
  • Patent number: 6147217
    Abstract: Processes for preparing compounds having the general formula: ##STR1## wherein R.sup.1a is protected carboxy, carboxy, hydroxymethyl, protected hydroxymethyl, or methyl are disclosed. Processes of the invention begin with a starting material of the general formula IV ##STR2## wherein R.sup.1 and R.sup.2 are as defined in the specification.
    Type: Grant
    Filed: May 24, 1999
    Date of Patent: November 14, 2000
    Assignee: Sepracor Inc.
    Inventors: Chris Hugh Senanayake, Qun Kevin Fang, Scott Harold Wilkinson
  • Patent number: 6147077
    Abstract: A method of treating fungal infections with a mixture of isomers of 2R,4S-hydroxyitraconazole and their sulfate and phosphate derivatives is disclosed. Pharmaceutical compositions containing these compounds are also disclosed.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: November 14, 2000
    Assignee: Sepracor Inc.
    Inventors: Patrick Koch, Richard F. Rossi, Jr., Chris Hugh Senanayake, Stephen Alan Wald
  • Patent number: 6140529
    Abstract: A process for the preparation of optically active cyclohexylphenylglycolate esters is described. The process utilizes carboxylic acid activation to couple (R)- or (S)-cyclohexylphenylglycolic acid (CHPGA) with 4-N,N-diethylamino butynol or other propargyl alcohol derivatives. The preparation of the hydrochloride salt is also described. In addition, a resolution process employing tyrosine methyl ester enantiomers for preparing a single enantiomer of CHPGA from racemic CHPGA is disclosed.
    Type: Grant
    Filed: December 15, 1998
    Date of Patent: October 31, 2000
    Assignee: Sepracor Inc.
    Inventors: Roger P. Bakale, Jorge L. Lopez, Francis X. McConville, Charles P. Vandenbossche, Chris Hugh Senanayake
  • Patent number: 6090971
    Abstract: A process for the preparation of optically active phenylcyclohexylglycolate esters is described. The process utilizes carboxylic acid activation to couple (R)-- or (S)-cyclohexylphenylglycolic acid (CHPGA) with 4-N,N-diethylamino butynol or other propargyl alcohol derivatives. The preparation of the hydrochloride salt is also described. In addition, a resolution process employing tyrosine methyl ester enantiomers for preparing a single enantiomer of CHPGA from racemic CHPGA is disclosed.
    Type: Grant
    Filed: June 25, 1999
    Date of Patent: July 18, 2000
    Assignee: Sepracor Inc.
    Inventors: Roger P. Bakale, Jorge L. Lopez, Francis X. McConville, Charles P. Vandenbossche, Chris Hugh Senanayake
  • Patent number: 6071971
    Abstract: The (R,R)-, (S,S)-, (R,S)-, (R,S)-isomers of 3-amino-4-hydroxy-.alpha.-[[[2-(4-methoxyphenyl)-1-methylethyl]amino]methy l]-benzenemethanol (D) ##STR1## are disclosed, as well as an efficient method for their stereoselective synthesis. A method and composition are also disclosed utilizing desformoterol (D) as a bronchodilator, having high selectivity for .beta..sub.2 receptors.
    Type: Grant
    Filed: May 5, 1999
    Date of Patent: June 6, 2000
    Assignee: Sepracor Inc.
    Inventor: Chris Hugh Senanayake
  • Patent number: 6040344
    Abstract: A method is disclosed for the preparation of optically pure isomers of formoterol by the reaction of an optically pure 4-benzyloxy-3-formamidostyrene oxide with an optically pure 4-methoxy-.alpha.-methyl-N-(phenylmethyl)benzeneethanamine followed by debenzylation. Useful intermediates in the process are also disclosed, as are the novel L-tartrate salt of R,R-formoterol and pharmaceutical compositions thereof.
    Type: Grant
    Filed: May 21, 1998
    Date of Patent: March 21, 2000
    Assignee: Sepracor Inc.
    Inventors: Yun Gao, Robert Hett, Kevin Q. Fang, Stephen A. Wald, Martin P. Redmon, Chris Hugh Senanayake
  • Patent number: 6028224
    Abstract: A synthesis of fluoxetine is disclosed. The process begins with a lower alkyl ester of 3-benzoylpropionic acid, which is reduced in the presence of a chiral ligand to produce the corresponding .gamma.-hydroxy ester, and the ester is cleaved. The free acid is then condensed with the alcohol to form a .gamma.-lactone, which is treated with ammonia to provide the .gamma.-hydroxy amide. The amide undergoes a Hoffman rearrangement to provide a 2-oxo-1,3 oxazine, which is reduced to 3-(methylamino)-1-phenyl-1-propanol. The alcohol is deprotonated and reacted with a 4-chloro- or 4-fluoro benzotrifluoride to provide fluoxetine free base.
    Type: Grant
    Filed: May 24, 1999
    Date of Patent: February 22, 2000
    Assignee: Sepracor Inc.
    Inventors: James Wallace Hilborn, Alex Roger Jurgens, Chris Hugh Senanayake
  • Patent number: 6025177
    Abstract: Processes for preparing a single enantiomer of an .alpha.,.alpha.-disubstituted-.alpha.-hydroxy acetic acid, especially cyclohexylphenylglycolic acid (CHPGA), is disclosed. The processes employ cyclic 1,2-aminoalcohols as chiral auxiliaries by forming diastereomeric esters of aminoalcohols or diastereomeric amides of oxazolidines. ##STR1## Intermediates useful in the process are also disclosed.
    Type: Grant
    Filed: February 9, 1999
    Date of Patent: February 15, 2000
    Assignee: Sepracor Inc.
    Inventors: Chris Hugh Senanayake, Roger P. Bakale, Qun Kevin Fang, Paul Timothy Grover, Donald L. Heefner, Richard F. Rossi, Stephen Alan Wald