Patents by Inventor Ramachandra A. Rao

Ramachandra A. Rao 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: 9227990
    Abstract: The present invention provides a compound of the Formula (I) wherein R is 9-isopropyl-9H-purin-6-amine; 2-amino-9-isopropyl-1H-purin-6(9H)-one; 4-amino-1-isopropyl pyrimidin-2(1H)-one; or 1-isopropyl-5-methylpyrimidine-2,4(1H,3H)-dione, R? is —CH2OC(O)R?, and R? is —C(CH3)3 or —CH(CH3)2 including pharmaceutically acceptable salts thereof. The present invention also provides a process for preparing a compound of formula (Ia) and a compound of formula (I) for use in treating a viral infection.
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: January 5, 2016
    Assignee: CIPLA LIMITED
    Inventors: Manjinder Singh Phull, Rajendra Narayanrao Kankan, Dharmaraj Ramachandra Rao
  • Publication number: 20150359898
    Abstract: A complex comprises pemetrexed and a coformer. A pharmaceutical composition comprises a complex of pemetrexed and a co-former and one or more pharmaceutically acceptable excipients.
    Type: Application
    Filed: February 6, 2014
    Publication date: December 17, 2015
    Applicant: CIPLA LIMITED
    Inventors: Shrinivas Madhukar Purandare, Geena Malhotra, Dharmaraj Ramachandra Rao, Rajendra Narayanrao Kankan, Srinivas Laxminarayan Pathi, Ravikumar Puppla
  • Publication number: 20150291639
    Abstract: The present invention provides a compound of the Formula (I) wherein R is 9-isopropyl-9H-purin-6-amine; 2-amino-9-isopropyl-1H-purin-6(9H)-one; 4-amino-1-isopropyl pyrimidin-2(1H)-one; or 1-isopropyl-5-methylpyrimidine-2,4(1H,3H)-dione, R? is —CH2OC(O)R?, and R? is —C(CH3)3 or —CH(CH3)2 including pharmaceutically acceptable salts thereof. The present invention also provides a process for preparing a compound of formula (Ia) and a compound of formula (I) for use in treating a viral infection.
    Type: Application
    Filed: October 29, 2013
    Publication date: October 15, 2015
    Applicant: Cipla Limited
    Inventors: Manjinder Singh Phull, Rajendra Narayanrao Kankan, Dharmaraj Ramachandra Rao
  • Patent number: 9150499
    Abstract: The present invention relates to a process for the preparation of substantially pure nateglinide of formula (I), substantially free from the cis-isomer and L-enantiomer and preparation of enantiomerically pure nateglinide form B, directly from the hydrolysis of a (?)-N-(trans-4-isopropylcyclohexyl-1-carbonyl)-D-phenylalanine alkyl ester in a ketonic solvent or water or mixture thereof.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: October 6, 2015
    Assignee: Cipla Limited
    Inventors: Rajendra Narayanrao Kankan, Dharmaraj Ramachandra Rao, Dilip Ramdas Birari
  • Patent number: 9146975
    Abstract: Various arrangements for managing access to unstructured data are presented. A plurality of access requests may be received from a plurality of remote computer systems to a plurality of business entities stored by a content management server. In response to receiving a request for access to a business entity of the plurality of business entities stored by a content management server from a remote computer system, an identifier request may be transmitted to the content management server. A response from the content management server may be received in response to the identifier request. A resource locator that comprises the identifier may be created. The resource locator may be transmitted to the remote computer system for use in accessing the business entity.
    Type: Grant
    Filed: April 26, 2012
    Date of Patent: September 29, 2015
    Assignee: Oracle International Corporation
    Inventors: Sreekanth Chintala, Rama Vijjapurapu, Todd Price, Nathan Angstadt, Hari Charan Ramachandra Rao
  • Patent number: 9147207
    Abstract: A method and system for generating image data representative of a person wearing one or more items of clothing includes using computing hardware to process data of one or more images of people wearing items of clothing to extract via segmentation processes data representative of the items of clothing; using computing hardware to process the data representative of the items of clothing to complete one or more missing parts of the data representative of the items of clothing to generate corresponding clothes data; using computing hardware to analyse an image of a target model to determine a pose of the target model in the image; and using computing hardware to metamorphose at least a portion of the clothes data to fit the image of the target model to generate metamorphosed clothes data, and to overlay the metamorphosed clothes data onto the image of the target model.
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: September 29, 2015
    Assignee: Stylewhile Oy
    Inventors: Jutta Haaramo, Jayasimha Ramachandra Rao, Leonardo Da Silva
  • Publication number: 20150266898
    Abstract: Amorphous rifaximin, methods of making it, and pharmaceutical compositions containing it. Also described are methods of converting amorphous rifaximin to crystalline rifaximin and vice versa.
    Type: Application
    Filed: June 8, 2015
    Publication date: September 24, 2015
    Inventors: Dharmaraj Ramachandra Rao, Rajendra Narayanrao Kankan, Manjinder Singh Phull
  • Publication number: 20150246935
    Abstract: The present invention provides improved processes for the preparation of Bortezomib, tert-butyl[1-({(1S)-3-methyl-1-[(3aS,4S,6S,7aS)-3a,5,5-trimethylhexahydro-4,6-methano-1,3,2-benzodioxaborol-2-yl]butyl}amino)-1-oxo-3-phenylpropan-2-yl]carbamate of formula (IV) and N-{(1S)-3-methyl-1-[(3aS,4S,6S,7aS)-3a,5,5-trimethylhexahydro-4,6-methano-1,3,2-benzodioxaborol-2-yl]butyl} phenylalanine of formula (V). Compound (IV) is prepared by coupling (1R)-3-methyl-1-[(3aS,4S,6S,7aR)-3a,5,5-trimethyl-hexahydro-4,6-methano-1,3,2-benzodioxaborol-2-yl]butan-1-amine of formula (II) or its salt with N-(tert-butoxycarbonyl)-L-phenylalanine of formula (III) in a first solvent in the presence of a first coupling agent and a first base, wherein the coupling process does not comprise solvent exchange. Compound (V) is prepared by deprotecting compound (IV) using an alcoholic solution of an inorganic acid.
    Type: Application
    Filed: September 11, 2013
    Publication date: September 3, 2015
    Inventors: Dharmaraj Ramachandra Rao, Rajendra Narayanrao Kankan, Srinivas Laxminarayan Pathi, Ravikumar Puppala
  • Publication number: 20150234836
    Abstract: Convenient approach for managing records with respect to entities based on file plans. In an embodiment, historical data representing policies previously selected is maintained. The historical data is then used to generate custom file plans containing policies most likely to be used by a corresponding user. A list in such custom file plan may have more relevant policies prioritized higher. A user may thus conveniently select a desired policy, and associate the selected policy with a set of entities to cause the selected policies to be applied against management of the set of entities.
    Type: Application
    Filed: April 30, 2015
    Publication date: August 20, 2015
    Inventors: Bhageerath Arasachetty, Shyam Babu Prasad, Hari Charan Ramachandra Rao
  • Publication number: 20150210629
    Abstract: The present invention provides a process for preparing a compound of formula (VI) or a salt thereof, the process comprising: (i) reacting 4-methoxyphenyl acetone with an amine of formula (VIII) under conditions of reductive amination to produce a compound of formula (II) or a salt thereof, wherein there is no isolation of an imine intermediate formed during the reductive amination; (ii) condensing the compound (II) or the acid addition salt thereof with an ?-haloketone of formula (III) to produce the compound of formula (IV); (iii) reducing the compound (IV) to a compound of formula (V); and (iv) reducing the compound (V) to the compound of formula (VI), wherein the reduction is carried out in the presence of either (1) a hydrogen donating compound in the presence of a hydrogen transfer catalyst; or (2) ammonium formate using a hydrogenation catalyst, wherein R1 and R2 are independently optionally substituted arylalkyl, and Hal is selected from chloro or bromo.
    Type: Application
    Filed: April 10, 2015
    Publication date: July 30, 2015
    Inventors: Vaishali Vaman HALDAVANEKAR, Mangesh PRABHU, Dharmaraj Ramachandra RAO, Rajendra Narayanrao KANKAN
  • Publication number: 20150202933
    Abstract: In view of the foregoing, an embodiment herein provides a commercial vehicle wheel comprises of a rim 101, and a disc 102, wherein the rim 101 includes an outer flange 103, an inner flange 104, an outer bead seat 105, an inner bead seat 106, a connecting region 107 for connecting the rim 101 and disc 102, a circumferential mounting groove 108 connected between the connecting region 107 and inner bead seat 106, wherein a valve hole 109 is provided in the outer bead seat 105 for positioning a valve 110, wherein the valve 110 stem is externally projecting outside the disc 102, thereby results in pave the way for achieving larger clearance between the valve and drum/calliper. The outer bead seat is straight across the radius of rim except the valve hole 109 region, and provided without having hump, ledger and/or intermediate ring in the rim 101.
    Type: Application
    Filed: August 23, 2013
    Publication date: July 23, 2015
    Inventors: Badrinarayanan Ramachandra Rao, Sundararajan Thiyagarajan, Rajaram Balaseshan
  • Publication number: 20150197523
    Abstract: There is provided a process for the preparation of sitagliptin or a pharmaceutically acceptable salt thereof, and a process for the preparation of intermediate compounds useful in the preparation of sitagliptin. In particular, there is provided a process comprising condensing 3-tert-butoxycarbonylamino-4-(2,4,5-trifluorophenyl)butyric acid of formula (II) with 3-(trifluoromethyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[4,3-a]pyrazine of formula (III) or a salt thereof in presence of a catalyst to obtain (R)-tert-butyl-4-oxo-4-(3-(trifluoromethyl)-5,6-dihydro-[1,2,4]-triazolo[4,3-a]pyrazin-7(8H)-yl)-1-(2,4,5-trifluorophenyl)butan-2-yl-carbamate of formula (IV) or a pharmaceutically acceptable salt thereof. The catalyst is represented by the compound of formula (V). Compound of formula (IV) or its pharmaceutically acceptable salt obtained may be deprotected to obtain a compound of formula (I).
    Type: Application
    Filed: August 8, 2013
    Publication date: July 16, 2015
    Inventors: Dharmaraj Ramachandra Rao, Rajendra Narayanrao Kankan, Maruti Ghagare, Swati Atul Kadam
  • Publication number: 20150183722
    Abstract: The present invention relates to a compound of formula A, wherein R is alkyl. Compound A may be used as an intermediate in the preparation of O-desmethyl venlafaxine or a salt thereof, and the present invention provides such a preparation, as well as a process for preparing the compound of formula A.
    Type: Application
    Filed: March 16, 2015
    Publication date: July 2, 2015
    Inventors: Rajendra Narayanrao KANKAN, Dharmaraj Ramachandra RAO, Manohar Raghunath SURVE
  • Patent number: 9047294
    Abstract: Convenient approach for managing records with respect to entities based on file plans. In an embodiment, historical data representing policies previously selected is maintained. The historical data is then used to generate custom file plans containing policies most likely to be used by a corresponding user. A list in such custom file plan may have more relevant policies prioritized higher. A user may thus conveniently select a desired policy, and associate the selected policy with a set of entities to cause the selected policies to be applied against management of the set of entities.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: June 2, 2015
    Assignee: Oracle International Corporation
    Inventors: Bhageerath Arasachetty, Shyam Babu Prasad, Hari Charan Ramachandra Rao
  • Publication number: 20150141383
    Abstract: There is disclosed crystalline darunavir hydrate substantially free of any non-aqueous solvent.
    Type: Application
    Filed: January 30, 2015
    Publication date: May 21, 2015
    Inventors: Manjinder Singh PHULL, Dharmaraj Ramachandra RAO, Rajendra Narayanrao KANKAN
  • Patent number: 9029421
    Abstract: The present invention provides a process for preparing a compound of formula (VI) or a salt thereof, the process comprising: (i) reacting 4-methoxyphenyl acetone with an amine of formula (VIII) under conditions of reductive amination to produce a compound of formula (II) or a salt thereof, wherein there is no isolation of an imine intermediate formed during the reductive amination; (ii) condensing the compound (II) or the acid addition salt thereof with an ?-haloketone of formula (III) to produce the compound of formula (IV); (iii) reducing the compound (IV) to a compound of formula (V); and (iv) reducing the compound (V) to the compound of formula (VI), wherein the reduction is carried out in the presence of either (1) a hydrogen donating compound in the presence of a hydrogen transfer catalyst; or (2) ammonium formate using a hydrogenation catalyst, wherein R1 and R2 are independently optionally substituted arylalkyl, and Hal is selected from chloro or bromo.
    Type: Grant
    Filed: June 2, 2009
    Date of Patent: May 12, 2015
    Assignee: Cipla Limited
    Inventors: Vaishali Vaman Haldavanekar, Mangesh Prabhu, Dharmaraj Ramachandra Rao, Rajendra Narayanrao Kankan
  • Patent number: 9018376
    Abstract: The invention relates to various new polymorphic forms of manidipine and pharmaceutically acceptable salts thereof. The invention also relates to processes for the preparation of the polymorphic forms of manidipine and pharmaceutically acceptable salts thereof.
    Type: Grant
    Filed: August 26, 2010
    Date of Patent: April 28, 2015
    Assignee: Cipla Limited
    Inventors: Dharmaraj Ramachandra Rao, Rajendra Narayanrao Kankan, Maruti Ganpati Ghagare
  • Patent number: 9012689
    Abstract: The present invention relates to a compound of formula A, wherein R is alkyl. Compound A may be used as an intermediate in the preparation of O-desmethyl venlafaxine or a salt thereof, and the present invention provides such a preparation, as well as a process for preparing the compound of formula A.
    Type: Grant
    Filed: July 14, 2010
    Date of Patent: April 21, 2015
    Assignee: Cipla Limited
    Inventors: Rajendra Narayanrao Kankan, Dharmaraj Ramachandra Rao, Manohar Raghunath Surve
  • Patent number: 9000158
    Abstract: In an embodiment, the present invention provides a process for preparing (?)-6-(4-aminophenyl)-5-methylpyridazin-3-(2H)-one, which process comprises: a) reacting racemic 6-(4-aminophenyl)-4,5-dihydro-5-methyl-3-(2H)-pyridazinone of formula II with a chiral tartaric acid derivative to obtain a diastereomeric salt of (?)-6-(4-aminophenyl)-4,5-dihydro-5-methyl-3-(2H)-pyridazinone and the chiral tartaric acid derivative; and b) reacting the diastereomeric salt with a base to obtain (?)-6-(4-aminophenyl)-4,5-dihydro-5-methyl-3-(2H)-pyridazinone. The (?)-6-(4-aminophenyl)-4,5-dihydro-5-methyl-3-(2H)-pyridazinone may be used to prepare levosimendan.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: April 7, 2015
    Assignee: Cipla Limited
    Inventors: Dharmaraj Ramachandra Rao, Rajendra Narayanrao Kankan, Manjinder Singh Phull, Ashwini Amol Sawant
  • Patent number: 8993789
    Abstract: The present invention provides a process for preparing methyl 5-acetamido-4-amino-6-(1,2,3-triacetoxypropyl)-5,6-dihydro-4H-pyran-2-carboxylate (V), which process comprises reducing methyl 5-acetamido-4-azido-6-(1,2,3-triacetoxypropyl)-5,6-dihydro-4H-pyran-2-carboxylate (IV) in the presence of a reducing agent selected from the group consisting of lithium aluminum hydride, sodium borohydride, zinc/ammonium chloride, zinc-ferric chloride and ferric chloride/sodium iodide. The present invention also provides compounds of formula (VIII) and (IX) which may be used in the synthesis of zanamivir. The present invention also provides processes for preparing compounds (VIII) and (IX) and processes involving their use, including in the synthesis of zanamivir.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: March 31, 2015
    Assignee: Cipla Limited
    Inventors: Manjinder Singh Phull, Rajendra Narayanrao Kankan, Dharmaraj Ramachandra Rao, Ashwini Amol Sawant, Sanoj Thoppil