Patents by Inventor Tetsuo Iwama

Tetsuo Iwama 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: 20190071441
    Abstract: The present invention provides a method for manufacturing a compound represented by formula (I). With this method, provided are a method for manufacturing a 4-heteroaryl-N-(2-phenyl-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-pyrazole-5-carboxylic acid amide derivative; and an intermediate for this manufacturing method.
    Type: Application
    Filed: November 6, 2018
    Publication date: March 7, 2019
    Applicant: MOCHIDA PHARMACEUTICAL CO., LTD.
    Inventors: Tsutomu SATOH, Takashi KUDOH, Tetsuo IWAMA
  • Patent number: 10174025
    Abstract: The present invention provides a method for manufacturing a compound represented by formula (I). With this method, provided are a method for manufacturing a 4-heteroaryl-N-(2-phenyl-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-pyrazole-5-carboxylic acid amide derivative; and an intermediate for this manufacturing method.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: January 8, 2019
    Assignee: MOCHIDA PHARMACEUTICAL CO., LTD.
    Inventors: Tsutomu Satoh, Takashi Kudoh, Tetsuo Iwama
  • Publication number: 20180099964
    Abstract: The present invention provides a method for manufacturing a compound represented by formula (I). With this method, provided are a method for manufacturing a 4-heteroaryl-N-(2-phenyl-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-pyrazole-5-carboxylic acid amide derivative; and an intermediate for this manufacturing method.
    Type: Application
    Filed: December 13, 2017
    Publication date: April 12, 2018
    Applicant: MOCHIDA PHARMACEUTICAL CO., LTD.
    Inventors: Tsutomu SATOH, Takashi KUDOH, Tetsuo IWAMA
  • Patent number: 9902723
    Abstract: The present invention provides a method for manufacturing a compound represented by formula (I). With this method, provided is a method for manufacturing a 4-substituted-N-(2-phenyl-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-pyrazole-5-carboxylic acid amide derivative; or an intermediate for this manufacturing method.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: February 27, 2018
    Assignee: MOCHIDA PHARMACEUTICAL CO., LTD.
    Inventors: Tsutomu Satoh, Takashi Kudoh, Tetsuo Iwama
  • Patent number: 9879009
    Abstract: The present invention provides a method for manufacturing a compound represented by formula (I). With this method, provided are a method for manufacturing a 4-heteroaryl-N-(2-phenyl-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-pyrazole-5-carboxylic acid amide derivative; and an intermediate for this manufacturing method.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: January 30, 2018
    Assignee: MOCHIDA PHARMACEUTICAL CO., LTD.
    Inventors: Tsutomu Satoh, Takashi Kudoh, Tetsuo Iwama
  • Publication number: 20170217958
    Abstract: The present invention provides a method for manufacturing a compound represented by formula (I). With this method, provided are a method for manufacturing a 4-heteroaryl-N-(2-phenyl-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-pyrazole-5-carboxylic acid amide derivative; and an intermediate for this manufacturing method.
    Type: Application
    Filed: July 29, 2015
    Publication date: August 3, 2017
    Applicant: MOCHIDA PHARMACEUTICAL CO., LTD.
    Inventors: Tsutomu SATOH, Takashi KUDOH, Tetsuo IWAMA
  • Publication number: 20170210740
    Abstract: The present invention provides a method for manufacturing a compound represented by formula (I). With this method, provided is a method for manufacturing a 4-substituted-N-(2-phenyl-[1,2,4]triazolo[1,5-a]pyridin-7-yl)-1H-pyrazole-5-carboxylic acid amide derivative; or an intermediate for this manufacturing method.
    Type: Application
    Filed: July 29, 2015
    Publication date: July 27, 2017
    Applicant: MOCHIDA PHARMACEUTICAL CO., LTD.
    Inventors: Tsutomu SATOH, Takashi KUDOH, Tetsuo IWAMA
  • Patent number: 8222427
    Abstract: This disclosure relates to novel processes useful in the purification of keto-amide, ketone and aldehyde compounds, which are useful as inhibitors of the hepatitis C virus (HCV) NS3 protease and have application in the treatment of conditions caused by HCV. The processes of this disclosure relate to purification via a bisulfite adduct. In particular, this disclosure relates to processes useful in the purification of the keto-amide compound of Formula I, (1R,5S)-N-[3-amino-1-(cyclobutylmethyl)-2,3-dioxopropyl]-3-[2(S)-[[[(1,1-dimethylethyl)amino]carbonyl]-amino]-3,3-dimethyl-1-oxobutyl]-6,6-dimethyl-3-azabicyclo[3.1.
    Type: Grant
    Filed: December 13, 2007
    Date of Patent: July 17, 2012
    Assignee: Merck Sharp & Dohme Corp.
    Inventors: George S. K. Wong, Jeonghan Park, Tetsuo Iwama, Anantha R. Sudhakar
  • Patent number: 8163937
    Abstract: The present invention relates also to a process for the preparation of intermediate compounds useful in preparing the compounds of Formula (I) using the process of Scheme (II).
    Type: Grant
    Filed: December 18, 2007
    Date of Patent: April 24, 2012
    Assignee: Schering Corporation
    Inventors: George S. K. Wong, Hong-Chang Lee, Jennifer A. Vance, Weidong Tong, Tetsuo Iwama
  • Publication number: 20100145013
    Abstract: The present invention relates also to a process for the preparation of intermediate compounds useful in preparing the compounds of Formula (I) using the process of Scheme (II).
    Type: Application
    Filed: December 18, 2007
    Publication date: June 10, 2010
    Applicant: Schering Corporation
    Inventors: George S. K. Wong, Hong-Chang Lee, Jennifer A. Vance, Weidong Tong, Tetsuo Iwama
  • Publication number: 20100113821
    Abstract: Disclosed is a process for preparing 3-(amino)-3-cyclobutylmethyl-2-hydroxy-propionamide hydrochloride, an intermediate useful in the preparation of the HCV protease inhibitor (1R,5S)—N-[3-amino-1-(cyclobutylmethyl)-2,3-dioxopropyl]-3-[2(S)-[[[(1,1-dimethylethyl)amino]carbonyl]amino]-3,3-dimethyl-1-oxobutyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexan-2(S)-carboxamide.
    Type: Application
    Filed: December 17, 2007
    Publication date: May 6, 2010
    Applicant: Schering-Plough Corporation
    Inventors: Jeonghan Park, Eugene J. Vater, Shuan Dong, Tetsuo Iwama, Ramani R. Raghavan, Hong-Chang Lee, George S.k. Wong
  • Publication number: 20090326244
    Abstract: A process for purifying the alpha-keto amide is (1R,5S)—N-[3-amino-1-(cyclobutylmethyl)-2,3-dioxopropyl]-3-[2(S)-[[[(1,1-dimethylethyl)amino]carbonyl]-amino]-3,3-dimethyl-1-oxobutyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexan-2(S)-carboxamide via a bisulfite adduct is disclosed.
    Type: Application
    Filed: December 13, 2007
    Publication date: December 31, 2009
    Inventors: George S. K. Wong, Jeonghan Park, Tetsuo Iwama, Anantha R. Sudhakar
  • Patent number: 7326795
    Abstract: In one embodiment, the present application relates to a process of making a compound of formula I: and to certain intermediate compounds that are made within the process of making the compound of formula I.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: February 5, 2008
    Assignee: Schering Corporation
    Inventors: Anantha Sudhakar, Vilas Dahanukar, Ilia A. Zavialov, Cecilia Orr, Hoa N. Nguyen, Juergen Weber, Ingyu Jeon, Minzhang Chen, Michael D. Green, George S. Wong, Jeonghan Park, Tetsuo Iwama
  • Publication number: 20050059800
    Abstract: In one embodiment, the present application relates to a process of making a compound of formula I: and to certain intermediate compounds that are made within the process of making the compound of formula I.
    Type: Application
    Filed: June 15, 2004
    Publication date: March 17, 2005
    Inventors: Anantha Sudhakar, Vilas Dahanukar, Ilia Zavialov, Cecilia Orr, Hoa Nguyen, Juergen Weber, Ingyu Jeon, Minzhang Chen, Michael Green, George Wong, Jeonghan Park, Tetsuo Iwama
  • Patent number: 5686635
    Abstract: Disclosed herein are a quinone derivative represented by the following formula: ##STR1## wherein R.sup.1 and R.sup.2 are identical with or different from each other and mean individually a lower alkyl or lower alkoxy group, or may form an aromatic ring together, R.sup.3 denotes a lower alkyl group, n stands for 0 or an integer of 1-9, and a linkage --- is a single or double bond, such as a vitamin K derivative or coenzyme derivative; and a process for the preparation of the quinone derivative at a high yield without forming any geometric isomer; as well as a 1,4,4.sub.a,8.sub.a -tetrahydro-4.sub.a .alpha.-alkenyl-1.alpha.,4.alpha.-methanonaphthalene-5,8-dione derivative which is useful as an intermediate for the preparation of the quinone derivative.
    Type: Grant
    Filed: July 26, 1996
    Date of Patent: November 11, 1997
    Assignee: Eisai Chemical Co., Ltd.
    Inventors: Kimio Hamamura, Tetsuo Iwama, Chiaki Seki, Masayuki Konishi
  • Patent number: 5677471
    Abstract: Disclosed herein are a quinone derivative represented by the following formula: ##STR1## wherein R.sup.1 and R.sup.2 are identical with or different from each other and mean individually a lower alkyl or lower alkoxy group, or may form an aromatic ring together, R.sup.3 denotes a lower alkyl group, n stands for 0 or an integer of 1-9, and a linkage--is a single or double bond, such as a vitamin K derivative or coenzyme Q derivative; and a process for the preparation of the quinone derivative at a high yield without forming any geometric isomer; as well as a 1,4,4.sub.a,8.sub.a -tetrahydro-4.sub.a .alpha.-alkenyl-1.alpha.,4.alpha.-methanonaphthalene-5,8-dione derivative which is useful as an intermediate for the preparation of the quinone derivative.
    Type: Grant
    Filed: July 26, 1996
    Date of Patent: October 14, 1997
    Assignee: Eisai Chemical Co., Ltd.
    Inventors: Kimio Hamamura, Tetsuo Iwama, Chiaki Seki, Masayuki Konishi
  • Patent number: 5476955
    Abstract: Disclosed herein are a quinone derivative represented by the following formula: ##STR1## wherein E.sup.1 and E.sup.2 are identical with or different from each other and mean individually a lower alkyl or lower alkoxy group, or may form an aromatic ring together, E.sup.3 denotes a lower alkyl group, n stands for 0 or an integer of 1-9, and a linkage ------ is a single or double bond, such as a vitamin K derivative or coenzyme Q derivative; and a process for the preparation of the quinone derivative at a high yield without forming any geometric isomer; as well as a 1,4,4.sub.a,8.sub.a -tetrahydro-4.sub.a .alpha.-alkenyl-1.alpha.,4.alpha.-methanonaphthalene-5,8-dione derivative which is useful as an intermediate for the preparation of the quinone derivative.
    Type: Grant
    Filed: March 1, 1994
    Date of Patent: December 19, 1995
    Assignee: Eisai Chemical Co., Ltd.
    Inventors: Kimio Hamamura, Tetsuo Iwama, Chiaki Seki, Masayuki Konishi