Patents Represented by Attorney Apotex Inc.
  • Patent number: 7834195
    Abstract: Atorvastatin calcium propylene glycol solvates and processes to prepare these novel solvates which are particularly useful and suitable for pharmaceutical applications.
    Type: Grant
    Filed: June 14, 2007
    Date of Patent: November 16, 2010
    Assignee: Apotex Pharmachem Inc.
    Inventors: K. S. Keshava Murthy, Yajun Zhao, Allan W. Rey, Daqing Che, David A. Stradiotto, Uma Kotipalli
  • Patent number: 7816355
    Abstract: This invention provides a process for the preparation of S-Rivaroxaban and/or R-Rivaroxaban comprising reacting, in the presence of a first base, a compound of Formula 9: with a compound of Formula 8:
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: October 19, 2010
    Assignee: Apotex Pharmachem Inc
    Inventors: Prabhudas Bodhuri, Gamini Weeratunga
  • Patent number: 7812179
    Abstract: A process is provided for preparing (R)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-5-hydroxy-3-oxo-1-heptanoic acid, R-substituted ester 9 comprising: (a) reacting the aldehyde 1 with the enolate form of (S)-2-hydroxy-1,2,2-triphenylethyl acetate substituent in a chelating co-solvent; (b) hydrolysis of (R,S)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-3-hydroxy-1-pentanoic acid, (S)-2-hydroxy-1,2,2-triphenylethyl ester (2a and 2b) using a base, preferably an alkali metal base, preferably in a solvent to form the carboxylic acid 7; (c) treating the acid 7 with a chiral base to form a salt and purifying the salt to obtain enantiomerically enriched (R)-7 chiral base salt; (d) alkylation of the (R)-7 chiral base salt or the free base derived from (R)-7, forming (R)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-5-hydroxy-3-oxo-1-heptanoic acid,
    Type: Grant
    Filed: August 14, 2008
    Date of Patent: October 12, 2010
    Assignee: Apotex PharmaChem Inc.
    Inventors: Fan Wang, Daqing Che, Bhaskar Reddy Guntoori, Yajun Zhao, Aaron C. Kinsman, Jody Faught, Alan Chow
  • Patent number: 7745624
    Abstract: A process for the preparation of an acid addition salt of ziprasidone base and intermediates thereof comprising exposing the ziprasidone base in solid form to a gaseous acid in a substantially dry environment.
    Type: Grant
    Filed: June 29, 2005
    Date of Patent: June 29, 2010
    Assignee: Apotex Pharma Chem Inc.
    Inventors: Allan W. Rey, Lotfi Derdour, K.S. Keshava Murthy, Probal Kanti Datta, Martin Ehlert, Stephen E. Home
  • Patent number: 7615647
    Abstract: A process is provided for preparing pharmaceutical grade atorvastatin hemicalcium salt comprising: (a) deesterifying, wherein R is an ester protecting group to (b) extracting R(R*,R*)-3 into an organic solvent or mixture of solvents, (c) adding a base of formula NR1R2R3 wherein R1, R2 and R3 are independently selected from H, substituted or non-substituted C1 to C7 alkyl, C6 to C9 aryl, C8 to C10 aralkyl or aminoalkyl to form atorvastatin base salt, (d) isolating by precipitation of the above atorvastatin base salt and purifying when necessary, (e) converting atorvastatin base salt to atorvastatin hemicalcium salt by treatment with a calcium salt solution, and (f) isolating the atorvastatin hemicalcium salt.
    Type: Grant
    Filed: August 5, 2005
    Date of Patent: November 10, 2009
    Assignee: Apotex Pharmachem Inc.
    Inventors: K.S. Keshava Murthy, Yajun Zhao, Daqing Che, Bhaskar Reddy Guntoori, Sammy Chris Duncan, Stephen E. Horne
  • Patent number: 7485754
    Abstract: Provided is an efficient method for the preparation of 3-aryloxy-3-arylpropylamines, their optical stereoisomers, and pharmaceutically acceptable salts thereof. The process allows for the isolation of 3-aryloxy-3-arylpropylamines in high yield and purity. The present invention further relates to a process for producing fluoxetine, tomoxetine, norfluoxetine, duloxetine, nisoxetine, and their optically enriched (R)- and (S)-enantiomers.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: February 3, 2009
    Assignee: Apotex Pharmachem Inc.
    Inventors: Zhi-Xian Wang, Mohammed Abdul Raheem, Gamini Weeratunga, Bhaskar Reddy Guntoori