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:
July 17, 2006
Date of Patent:
September 30, 2008
Assignee:
Apotex Pharmachem Inc.
Inventors:
Fan Wang, Daqing Che, Bhaskar Reddy Guntoori, Yajun Zhao, Aaron C. Kinsman, Jody Faught, Alan Chow
Abstract: A process 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, tert-butylester comprising: (a) reduction of 5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-3-oxo-1-pentanoic acid, (R)-2-hydroxy-1,2,2-triphenylethyl ester; (b) hydrolysis of (R)-5-[2-(4-fluorophenyl)-5-(1-methylethyl)-3-phenyl-4-[(phenylamino)carbonyl]-1H-pyrrol-1-yl]-3-hydroxy-1-pentanoic acid, (R)-2-hydroxy-1,2,2-triphenylethyl ester using an alkali base in a solvent to form the acid; (c) alkylation of the acid 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, tert-butylester.
Type:
Grant
Filed:
March 16, 2004
Date of Patent:
March 20, 2007
Assignee:
Apotex Pharmachem Inc.
Inventors:
Bhaskar Reddy Guntoori, Daqing Che, Fan Wang, Yajun Zhao, K. S. Keshava Murthy, Stephen E. Horne
Abstract: A process for preparing Oxcarbazepine III comprising: a) reacting oximinostilbene IV ?with chlorosulfonyl isocyanate in an inert organic solvent and isolating compound V b) hydrolyzing compound V to form crude Oxcarbazepine III c) purifying oxcarbazepine.
Type:
Grant
Filed:
June 16, 2005
Date of Patent:
October 24, 2006
Assignee:
Apotex Pharmachem Inc.
Inventors:
Daqing Che, Nadia Corelli-Rennie, Bhaskar Reddy Guntoori, Jodi Faught
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:
April 6, 2005
Date of Patent:
September 26, 2006
Assignee:
Apotex Pharmachem Inc.
Inventors:
Fan Wang, Daqing Che, Bhaskar Reddy Guntoori, Yajun Zhao, Aaron C. Kinsman, Jody Faught, Alan Chow
Abstract: An inflatable enclosure comprising: at least one inflating means for inflating said inflatable enclosure; at least one entrance/exit means for entering and exiting said inflatable enclosure; at least one air pressure regulator for maintaining the air pressure in said enclosure when said at least one entrance/exit means is in use, at least one inflatable rigidifying means; wherein at least one of said entrance/exit means and air pressure regulator is air actuated.
Abstract: The present invention relates to a peritoneal dialysis solution comprising at least one amino sugar in an effective amount sufficient to create an osmotic pressure to effect the removal of water by diffusion from the patient's blood across the peritoneal membrane into the solution. In one embodiment the at least one amino sugar is selected from the group consisting of acetylated amino sugars, preferably N-acetylglucosamine, deacetylated amino sugars and combinations thereof.
Abstract: A portable device for dispensing drywall patching compound (mud) onto drywall is disclosed. The dispenser has a device on one end used for metering the drywall compound in a controlled manner and has affixed to at least one side an abrasive surface, preferably sand paper that can be used to smooth out the drywall compound when dry. As a preferred embodiment, the cap of the container contains a spatula or other device that can be used to shape the compound as it is being applied.
Abstract: A pharmaceutical tablet which incorporates two smaller tablets, one of which comprises an NSAID and the other of which comprises misoprostol.
Abstract: The differential engine comprises a motor, a torque conversion stage, and a loading mechanism. The torque conversion stage includes first and second differential stages which are coupled together with a pair of shafts, with the shafts rotating in opposite directions. The first differential stage comprises an input shaft which is coupled to the output shaft of the motor, and first and second output shafts which are coupled to the respective shafts. The second differential stage comprises an output coupled to the output drive shaft, and first and second input shafts which are coupled to the respective shafts. The second differential stage includes a gear mechanism which applies a rotational torque to the output drive shaft when a difference occurs between the rotational speeds for the shafts. The rotational speeds of the shafts are varied by loading one or both of the shafts.
Abstract: A handle for a movable closure, such as a screen having at least one edge frame preferably for retaining a screen cloth, said closure being movable into a slot-like recess disposed in a structure against which the closure engages. The handle comprising a first inside flexible member and a second outside flexible member.
Type:
Grant
Filed:
May 29, 2001
Date of Patent:
March 30, 2004
Assignee:
Preferred Engineering Products Ltd.
Inventors:
Sean Davies, Sinnathamby Kupenthirarajan
Abstract: A sliding screen frame for a closure assembly, the frame comprising framing sections assembled to form the screen frame, one of the frame sections being adapted to contain a roll out screen, the roll out screen being slidable between a fully extended position, whereat the screen is substantially payed out from the roll, and a fully retracted position; wherein the screen frame is free to slide in the closure assembly whether the roll screen is at the fully extended or the fully retracted position.
Type:
Grant
Filed:
April 4, 2002
Date of Patent:
March 9, 2004
Assignee:
420820 Ontario Limited
Inventors:
Shaul Goldenberg, Sean Davies, Sinnathamby Kupenthirarajan
Abstract: A reinforcing block for a closure tilt latch, comprising a body fastened in a closure track fastened to a frame, said body having a top and bottom and having a locking detent extending therein said locking detent providing a vertical face extending toward said top of said body from intermediate said top and bottom, the tilt latch being compatible with the vertical face of said locking detent, wherein when said latch engages said detent said block provides a reinforcement path to the closure frame to strengthen the loading capability of said closure and to reduce the risk of the latch from disengaging said track under loading which track would be subject to distortion had the block not been utilized.
Type:
Grant
Filed:
May 21, 2001
Date of Patent:
January 20, 2004
Assignee:
420820 Ontario Limited
Inventors:
John Robert Davies, Sean Davies, Sinnathamby Kupenthirarajan
Abstract: A colored institutional towel comprising ground warp, fill, and pile warped yarns, all of said yarns being colored by intimately draw blending a predetermined amount of pre-dyed polyester fiber with cotton fiber when the yarn is spun and twisted to thereby form a predetermined color for the institutional towel.
Type:
Grant
Filed:
December 20, 2002
Date of Patent:
December 23, 2003
Assignee:
Blair Mills L.P.
Inventors:
David Eugene Hamby, Wilbur Mattison Rice
Abstract: A method of advertising in a shower for the hospitality industry including providing replaceable advertisements on a shower closure, for example a door, curtain or the like.
Abstract: A pharmaceutical tablet comprising a core and a film coating wherein the core comprises an NSAID and the film coating comprises a polymer and misoprostol.
Abstract: The present invention relates to a process for the production of (S)-1,2,3,4-tetrahydro-6,7-dialkoxy-3-isoquinolinecarboxylic acid compounds (1) and their derivatives from Levodopa (L-Dopa). The ultimately prepared compounds are used as intermediates for, but not limited to, the preparation of substituted derivatives of 1,2,3,4-tetrahydro-6,7-dialkoxy-3-isoquinolinecarboxylic acid
wherein
R1 is hydrogen, lower alkyl, C2-C12 acyl, or R1O together are methylenedioxy;
R2 is hydrogen, alkyl, substituted alkyl, alkenyl, substituted alkenyl, aryl, substituted aryl, aralkyl or substituted aralkyl group; and
R3 is hydrogen, C2-C12 acyl group, benzyl, alkoxylcarbonyl group, or aralkoxyl carbonyl group.