Patents by Inventor David Alexander Learmonth

David Alexander Learmonth 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: 9550759
    Abstract: New compounds of formula I are described. The compounds have potentially valuable pharmaceutical properties in the treatment of some central and peripheral nervous system disorders.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: January 24, 2017
    Assignee: BIAL—PORTELA & CA, S.A.
    Inventors: David Alexander Learmonth, Laszlo Erno Kiss, Pedro Nuno Leal Palma, Humberto Dos Santos Ferreira, Patricio Manuel Vieira Araujo Soares Da Silva
  • Publication number: 20160311804
    Abstract: The present invention relates to a process for preparing (R)-5-(2-(benzylamino)ethyl)-1-(6,8-difluorochroman-3-yl)-1H-imidazole-2(3H)-thione, and pharmaceutically acceptable salts thereof, especially the hydrochloride salt. The invention also relates to a process for making intermediates useful in the formation of said compound, and to the intermediates, per se.
    Type: Application
    Filed: February 23, 2016
    Publication date: October 27, 2016
    Inventors: Alexander BELIAEV, Jorge Bruno Reis WAHNON, David Alexander LEARMONTH, Jonathan MADEC, Jean-Marie SCHNEIDER, William MATON
  • Patent number: 9458111
    Abstract: A process for preparing a substitute urea of Formula (II) or Formula (I), or a pharmaceutically acceptable salt or ester thereof: the process comprising the reaction of a carbamate of Formula (II?): Formula (I?): with a primary or secondary amine of the formula R1R2NH, wherein ring A, and R1, R2, R5, V, W, X, Y and Z are as defined herein.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: October 4, 2016
    Assignee: BIAL—PORTELA & CA, S.A.
    Inventors: David Alexander Learmonth, Brian Broadbelt, Jorge Bruno Reis Wahnon
  • Patent number: 9446012
    Abstract: This invention relates to novel substituted nitrocatechol derivatives, their use in the treatment of some central and peripheral nervous system disorders and pharmaceutical compositions containing them.
    Type: Grant
    Filed: August 30, 2013
    Date of Patent: September 20, 2016
    Assignee: BIAL—PORTELA & CA, S.A.
    Inventors: David Alexander Learmonth, Laszlo Erno Kiss, Pedro Nuno Leal Palma, Humberto dos Santos Ferreira, Patricio Manuel V. A. Soares da Silva
  • Publication number: 20160176823
    Abstract: A process for preparing (S)-(+)-10,11-dihydro-10-hydroxy-5H-dibenz/b,f/azepine-5-carboxamide or (R)-(?)-10,11-dihydro-10-hydroxy-5H-dibenz/b,f/azepine-5-carboxamide, by reduction of oxcarbazepine in the presence of a catalyst and a hydride source is disclosed. The catalyst is prepared from a combination of [RuX2(L)]2 wherein X is chlorine, bromine or iodine, and L is an aryl or aryl-aliphatic ligand, with a ligand of formula (A) or formula (B): wherein R1 is chosen from C1-6 alkoxy and C1-6 alkyl, n is a number from 0 to 5, and when n is a number from 2 to 5, R1 can be the same or different, and R2 is alkyl, substituted alkyl, aryl, substituted aryl, alkaryl or substituted alkaryl. The hydride source is either NR3R4R5 and formic acid, [R3R4R5NH][OOCH] and optionally formic acid, or [M][OOCH]x and formic acid, wherein R3, R4 and R5 are C1-6 alkyl, M is an alkali metal or alkaline earth metal and x is 1 or 2. A pH from 6.5 to 8 is maintained during the process.
    Type: Application
    Filed: November 18, 2015
    Publication date: June 23, 2016
    Inventors: David Alexander LEARMONTH, Gabriela Alexandra GRASA, Antonio ZANOTTI-GEROSA
  • Patent number: 9353082
    Abstract: The invention relates to compounds and compositions for inhibiting the enzyme fatty acid amide hydrolase (FAAH), the use of the compounds in therapy and, in particular, for treating or preventing conditions whose development or symptoms are linked to substrates of the FAAH enzyme, and methods of treatment or prevention using the compounds and compositions.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: May 31, 2016
    Assignee: BIAL—PORTELA & CA, S.A.
    Inventors: Laszlo Erno Kiss, David Alexander Learmonth, Carla Patrícia da Costa Pereira Rosa, Rita Gusmãmo de Noronha, Pedro Nuno Leal Palma, Patrício Manuel Vieira Araújo Soares da Silva, Alexander Beliaev
  • Patent number: 9346751
    Abstract: The present invention relates to a process for preparing (R)-5-(2-(benzylamino)ethyl)-1-(6,8-difluorochroman-3-yl)-1H-imidazole-2(3H)-thione, and pharmaceutically acceptable salts thereof, especially the hydrochloride salt. The invention also relates to a process for making intermediates useful in the formation of said compound, and to the intermediates, per se.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: May 24, 2016
    Assignee: Bial-Portela & CA, S.A.
    Inventors: Alexander Beliaev, Jorge Bruno Reis Wahnon, David Alexander Learmonth, Jonathan Madec, Jean-Marie Schneider, William Maton
  • Publication number: 20160009700
    Abstract: There is disclosed a methylated intermediate which may be demethylated to provide an inhibitor of catechol-O-methyltransferase useful in the treatment of Parkinson's disease. Also disclosed are methods of making and using said intermediate.
    Type: Application
    Filed: July 31, 2015
    Publication date: January 14, 2016
    Inventors: Domenico Russo, Laszlo Erno Kiss, Jorge Bruno Reis Wahnon, David Alexander Learmonth, Tibor Eszenyi, Axel Zimmermann, Bjoern Schlummer, Michael Kreis, Klaus Reiter
  • Publication number: 20160009699
    Abstract: The invention relates to the use of an oxodiazolyl compound (I) for the preparation of a medicament for the prevention or treatment of central and peripheral nervous system associated disorders, wherein said medicament is administered according to a dosing regimen having a dosing periodicity ranging from about twice a day to about once every other day.
    Type: Application
    Filed: April 17, 2015
    Publication date: January 14, 2016
    Applicant: BIAL - PORTELA & CA, S.A.
    Inventors: David Alexander Learmonth, Laszlo Erno Kiss, Pedro Nuno Leal Palma, Humberto dos Santos Ferreira, Patricio Manuel V. A. Soares Da Silva
  • Patent number: 9206135
    Abstract: A process for preparing (S)-(+)-10,11-dihydro-10-hydroxy-5H-dibenz/b,f/azepine-5-carboxamide or (R)-(?)-10,11-dihydro-10-hydroxy-5H-dibenz/b,f/azepine-5-carboxamide, by reduction of oxcarbazepine in the presence of a catalyst and a hydride source is disclosed. The catalyst is prepared from a combination of [RuX2(L)]2 wherein X is chlorine, bromine or iodine, and L is an aryl or aryl-aliphatic ligand, with a ligand of formula (A) or formula (B): wherein R1 is chosen from C1-6 alkoxy and C1-6 alkyl, n is a number from 0 to 5, and when n is a number from 2 to 5, R1 can be the same or different, and R2 is alkyl, substituted alkyl, aryl, substituted aryl, alkaryl or substituted alkaryl. The hydride source is either NR3R4R5 and formic acid, [R3R4R5NH][OOCH] and optionally formic acid, or [M][OOCH]x and formic acid, wherein R3, R4 and R5 are C1-6 alkyl, M is an alkali metal or alkaline earth metal and x is 1 or 2. A pH from 6.5 to 8 is maintained during the process.
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: December 8, 2015
    Assignee: Bial-Portela & CA, S.A.
    Inventors: David Alexander Learmonth, Gabriela Alexandra Grasa, Antonio Zanotti-Gerosa
  • Patent number: 9126988
    Abstract: There is disclosed a methylated intermediate which may be demethylated to provide an inhibitor of catechol-O-methyltransferase useful in the treatment of Parkinson's disease. Also disclosed are methods of making and using said intermediate.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: September 8, 2015
    Assignee: BIAL—PORTELA & CA, S.A.
    Inventors: Domenico Russo, Laszlo Erno Kiss, Jorge Bruno Reis Wahnon, David Alexander Learmonth, Tibor Eszenyi, Axel Zimmermann, Bjoern Schlummer, Michael Kreis, Klaus Reiter
  • Publication number: 20150166519
    Abstract: This invention relates to novel polymorphs of (HO)2NO2(C6H)—(C2N2O)—(C5N)(CH3)2Cl2O, to processes for their preparation, and to pharmaceutical compositions containing said novel polymorphs as active pharmaceutical ingredient.
    Type: Application
    Filed: February 23, 2015
    Publication date: June 18, 2015
    Inventor: David Alexander LEARMONTH
  • Publication number: 20150072977
    Abstract: New compounds of formula I are described. The compounds have potentially valuable pharmaceutical properties in the treatment of some central and peripheral nervous system disorders.
    Type: Application
    Filed: November 14, 2014
    Publication date: March 12, 2015
    Inventors: David Alexander LEARMONTH, Laszlo Erno KISS, Pedro Nuno LEAL PALMA, Humberto DOS SANTOS FERREIRA, Patricio Manuel Vieira ARAUJO SOARES DA SILVA
  • Patent number: 8975410
    Abstract: This invention relates to novel polymorphs of (HO)2NO2(C6H)—(C2N2O)—(C5N)(CH3)2Cl2O, to processes for their preparation, and to pharmaceutical compositions containing said novel polymorphs as active pharmaceutical ingredient.
    Type: Grant
    Filed: March 16, 2009
    Date of Patent: March 10, 2015
    Assignee: BIAL—Portela & CA., S.A.
    Inventors: David Alexander Learmonth, Keith Lorimer, Kevin Wayne Meyer, Tibor Eszenyi, Álmosné Kovách
  • Patent number: 8957222
    Abstract: A process for preparing the S or R enantiomer of a compound of formula A, the process comprising subjecting a compound of formula B to asymmetric hydrogenation in the presence of a chiral transition metal catalyst and a source of hydrogen, wherein X is CH2, oxygen, or sulphur; R1, R2 and R3 are the same or different and signify hydrogens, halogens, alkyl, alkyloxy, hydroxy, nitro, alkylcarbonylamino, alkylamino, or dialkylamino group; and R4 is alkyl or aryl, wherein the transition metal catalyst comprises a chiral ligand having the formula wherein p is from 1 to 6, and Ar means aryl group; wherein the term alkyl means hydrocarbon chains, straight or branched, containing from one to six carbon atoms, optionally substituted by aryl, alkoxy, halogen, alkoxycarbonyl or hydroxycarbonyl groups; the term aryl means an aromatic or heteroaromatic group, optionally substituted by alkyloxy, halogen, or nitro group; and the term halogen means fluorine, chlorine, bromine, or iodine.
    Type: Grant
    Filed: March 17, 2009
    Date of Patent: February 17, 2015
    Assignee: Bial-Portela & CA, S.A.
    Inventors: Alexander Beliaev, David Alexander Learmonth, Wenge Li
  • Patent number: 8907099
    Abstract: New compounds of formula I are described. The compounds have potentially valuable pharmaceutical properties in the treatment of some central and peripheral nervous system disorders.
    Type: Grant
    Filed: April 9, 2012
    Date of Patent: December 9, 2014
    Assignee: Bial-Portela & Ca, S.A.
    Inventors: David Alexander Learmonth, Laszlo Erno Kiss, Pedro Nuno Leal Palma, Humberto Dos Santos Ferreira, Patricio Manuel Vieira Araújo Soares da Silva
  • Publication number: 20140350057
    Abstract: There is disclosed a methylated intermediate which may be demethylated to provide an inhibitor of catechol-O-methyltransferase useful in the treatment of Parkinson's disease. Also disclosed are methods of making and using said intermediate.
    Type: Application
    Filed: December 12, 2012
    Publication date: November 27, 2014
    Applicant: BIAL - PORTELA & CA, S.A.
    Inventors: Domenico Russo, Laszlo Erno Kiss, Jorge Bruno Reis Wahnon, David Alexander Learmonth, Tibor Eszenyi, Axel Zimmermann, Bjoern Schlummer, Michael Kreis, Klaus Reiter
  • Patent number: 8865913
    Abstract: The present invention relates to crystalline Form A of 1-[(3R)-6,8-difluoro-3,4-dihydro-2H-1-benzopyran-3-yl]-1,3-dihydro-5-[2-[(phenylmethyl)amino]ethyl]-2H-imidazole-2-thione and crystalline Form B of 1-[(3R)-6,8-difluoro-3,4-dihydro-2H-1-benzopyran-3-yl]-1,3-dihydro-5-[2-[(phenylmethyl)amino]ethyl]-2H-imidazole-2-thione, processes for preparing the forms and their uses in medicine. The present invention also relates to the amorphous form of 1-[(3R)-6,8-difluoro-3,4-dihydro-2H-1-benzopyran-3-yl]-1,3-dihydro-5-[2-[(phenylmethyl)amino]ethyl]-2H-imidazole-2-thione processes for preparing it and its uses in medicine.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: October 21, 2014
    Assignee: Bial-Portela & CA, S.A.
    Inventors: Alexander Beliaev, David Alexander Learmonth, Brian Broadbelt, Ekaterina Albert, Patricia Andres
  • Publication number: 20140221668
    Abstract: The present invention relates to a process for preparing (R)-5-(2-(benzylamino)ethyl)-1-(6,8-difluorochroman-3-yl)-1H-imidazole-2(3H)-thione, and pharmaceutically acceptable salts thereof, especially the hydrochloride salt. The invention also relates to a process for making intermediates useful in the formation of said compound, and to the intermediates, per se.
    Type: Application
    Filed: June 29, 2012
    Publication date: August 7, 2014
    Applicant: BIAL-PORTELA & CA, S.A.
    Inventors: Alexander Beliaev, Jorge Bruno Reis Wahnon, David Alexander Learmonth, Jonathan Madec, Jean-Marie Schneider, William Maton
  • Patent number: 8710239
    Abstract: A process for preparing the S or R enantiomer of a compound of formula A, the process comprising subjecting a compound of formula B to asymmetric hydrogenation in the presence of a chiral catalyst and a source of hydrogen, wherein X is CH2, oxygen or sulphur; R1, R2 and R3 are the same or different and signify hydrogens, halogens, alkyl, alkyloxy, hydroxy, nitro, alkylcarbonylamino, alkylamino or dialkylamino group; and R4 is alkyl or aryl, wherein the term alkyl means hydrocarbon chains, straight or branched, containing from one to six carbon atoms, optionally substituted by aryl, alkoxy, halogen, alkoxycarbonyl or hydroxycarbonyl groups; the term aryl means a phenyl or naphthyl group, optionally substituted by alkyloxy, halogen or nitro group; and the term halogen means fluorine, chlorine, bromine or iodine.
    Type: Grant
    Filed: May 6, 2009
    Date of Patent: April 29, 2014
    Assignee: Bial—Portela & C.A., S.A.
    Inventors: Alexander Beliaev, David Alexander Learmonth