Patents by Inventor Eiji Numagami

Eiji Numagami 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: 9469623
    Abstract: An object of the present invention is to provide an optically active bicyclic ?-amino acid derivative in a high purity.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: October 18, 2016
    Assignee: Daiichi Sankyo Company, Limited
    Inventors: Yoshitaka Nakamura, Kazutoshi Ukai, Takafumi Kitawaki, Takumi Nakajima, Yutaka Kitagawa, Yukito Furuya, Makoto Imai, Eiji Numagami, Masakazu Wakayama, Ayako Saito
  • Publication number: 20150218123
    Abstract: An object of the present invention is to provide an optically active bicyclic ?-amino acid derivative in a high purity.
    Type: Application
    Filed: February 6, 2015
    Publication date: August 6, 2015
    Applicant: Daiichi Sankyo Company, Limited
    Inventors: Yoshitaka NAKAMURA, Kazutoshi UKAI, Takafumi KITAWAKI, Takumi NAKAJIMA, Yutaka KITAGAWA, Yukito FURUYA, Makoto IMAI, Eiji NUMAGAMI, Masakazu WAKAYAMA, Ayako SAITO
  • Patent number: 8884001
    Abstract: The present invention relates to a process for preparing a compound of formula 682-4, said process comprising the steps of: (i) converting a compound of formula 682-1 into a compound of formula 682-2; (ii) converting said compound of formula 682-2? into a compound of formula 682-3; and (iii) converting said compound of formula 682-3 into a compound of formula 682-4. Further aspects of the invention relate to the use of the above process in the preparation of 2?-cyano-2?-deoxy-N4-palmitoyl-1-?-D-arabmofuranosylcytosine, a pyrimidine nucleoside which is therapeutically useful in the treatment and/or prevention of cancer.
    Type: Grant
    Filed: May 8, 2009
    Date of Patent: November 11, 2014
    Assignee: Cyclacel Limited
    Inventors: Gavin Wood, Robert Westwood, Tsuyoshi Murofushi, Eiji Numagami, Takashi Takita
  • Publication number: 20120252854
    Abstract: A crystalline form of a hydrate of a dihydrochloride 5-(4-{[6-(4-amino-3,5-dimethylphenoxy)-1-methyl-1-H-benzimidazol-2-yl]methoxy}benzyl)-1,3-thiazolidine-2,4-dione represented by the following formula: wherein the crystalline form shows main peaks at interplanar spacings of 10.42, 5.85, 5.52, 3.84, 3.46 and 2.95 angstroms in X-ray powder diffraction obtained with Cu K? line radiation (wavelength ?=1.54 angstroms).
    Type: Application
    Filed: May 7, 2012
    Publication date: October 4, 2012
    Applicant: DAIICHI-SANKYO COMPANY, LIMITED
    Inventors: Hisaki Kajino, Yutaka Ikeuchi, Hiroshi Miyamoto, Eiji Numagami, Satoru Nihei
  • Publication number: 20120238759
    Abstract: A method for manufacturing a 6-substituted 1-methyl-1H-benzimidazole derivative represented by the formula (IV) wherein R3 represents a hydrogen atom or a C1-C4 alkyl group. A 4-substituted N2-methylbenzene-1,2-diamine derivative is prepared from a particular 5-substituted N-methyl-2-nitroaniline derivative, subsequently reacting the resulting compound with {4-[(2,4-dioxo-1,3-thiazolidin-5-yl)methyl]phenoxy}acetic acid or an acid chloride or a mixed acid anhydride thereof, and subsequently subjecting the resulting compound to intramolecular dehydration condensation. A compound of the formula (II) wherein R1 represents a hydrogen atom, a C1-C4 alkyl group, or a protective group for the nitrogen atom, and R2 represents a hydrogen atom or a protective group for the nitrogen atom is prepared and used as an intermediate.
    Type: Application
    Filed: November 25, 2010
    Publication date: September 20, 2012
    Applicant: DAIICHI SANKYO COMPANY, LIMITED
    Inventors: Yutaka Ikeuchi, Chiharu Satoh, Eiji Numagami, Satoru Nihei, Hisaki Kajino
  • Patent number: 8236834
    Abstract: It is an object of the present invention to provide the crystalline form of a thiazolidinedione compound, which is effective as a pharmaceutical ingredient for manufacturing a peroxisome proliferator-activated receptor (PPAR) activator and an anticancer pharmaceutical composition. The present invention relates to a crystalline form of a hydrate of 5-(4-{[6-(4-amino-3,5-dimethylphenoxy)-1-methyl-1-H-benzimidazol-2-yl]methoxy}benzyl)-1,3-thiazolidine-2,4-dione dihydrochloride represented by the following formula (I).
    Type: Grant
    Filed: February 8, 2008
    Date of Patent: August 7, 2012
    Assignee: Daiichi Sankyo Company, Limited
    Inventors: Hisaki Kajino, Yutaka Ikeuchi, Eiji Numagami
  • Publication number: 20110213158
    Abstract: It is an object of the present invention to provide the crystalline form of a thiazolidinedione compound, which is effective as a pharmaceutical ingredient for manufacturing a peroxisome proliferator-activated receptor (PPAR) activator and an anticancer pharmaceutical composition. The present invention relates to a crystalline form of a hydrate of 5-(4-{[6-(4-amino-3,5-dimethylphenoxy)-1-methyl-1-H benzimidazol-2-yl]methoxy}benzyl)-1,3-thiazolidine-2,4-dione dihydrochloride represented by the following formula (I).
    Type: Application
    Filed: February 8, 2008
    Publication date: September 1, 2011
    Inventors: Hisaki Kajino, Yutaka Ikeuchi, Hiroshi Miyamoto, Eiji Numagami, Satoru Nihei
  • Publication number: 20110160462
    Abstract: Thiazolidinedione compound crystalline forms useful as a bulk material for the manufacture of a peroxisome proliferator-activated receptor (PPAR) ? activator or an anticancer pharmaceutical composition are provided, which are hydrate crystalline forms of 5-(4-{[6-(4-amino-3,5-dimethylphenoxy)-1-methyl-1-H-benzimi dazol-2-yl]methoxy}benzyl)-1,3-thiazolidine-2,4-dione represented by Formula (I) below and of its dihydrochloride.
    Type: Application
    Filed: July 30, 2009
    Publication date: June 30, 2011
    Applicant: DAIICHI SANKYO COMPANY, LIMITED
    Inventors: Hisaki Kajino, Eiji Numagami, Satoru Nihei
  • Publication number: 20110124692
    Abstract: Thiazolidinedione compound crystalline forms useful as a bulk material for the manufacture of a peroxisome proliferator-activated receptor (PPAR) ? activator or an anticancer pharmaceutical composition are provided, which are hydrate crystalline forms of 5-(4-{[6-(4-amino-3,5-dimethylphenoxy)-1-methyl-1-H-benzimi dazol-2-yl]methoxy}benzyl)-1,3-thiazolidine-2,4-dione represented by Formula (I) below and of its dihydrochloride.
    Type: Application
    Filed: July 30, 2009
    Publication date: May 26, 2011
    Applicant: DAIICHI SANKYO COMPANY, LIMITED
    Inventors: Hisaki Kajino, Yutaka Ikeuchi, Eiji Numagami, Satoru Nihei
  • Publication number: 20110046388
    Abstract: It is an object of the present invention to provide the crystalline form of a thiazolidinedione compound, which is effective as a pharmaceutical ingredient for manufacturing a peroxisome proliferator-activated receptor (PPAR) activator and an anticancer pharmaceutical composition. The present invention relates to a crystalline form of a hydrate of 5-(4-{[6-(4-amino-3,5-dimethylphenoxy)-1-methyl-1-H benzimidazol-2-yl]methoxy}benzyl)-1,3-thiazolidine-2,4-dione dihydrochloride represented by the following formula (I).
    Type: Application
    Filed: February 8, 2008
    Publication date: February 24, 2011
    Inventors: Hisaki Kajino, Yutaka Ikeuchi, Hiroshi Miyamoto, Eiji Numagami, Satoru Nihei
  • Patent number: 6908906
    Abstract: The present invention provides crystalline forms and compositions thereof, of a pyrimidine nucleoside derivative of formula (I) having anti-tumour activity, wherein formula (I) is:
    Type: Grant
    Filed: August 7, 2003
    Date of Patent: June 21, 2005
    Assignee: Sankyo Company, Limited
    Inventors: Takashi Takita, Keiichi Ohtsuka, Eiji Numagami, Susumu Harashima
  • Publication number: 20040053883
    Abstract: The present invention provides crystalline forms and compositions thereof, of a pyrimidine nucleoside derivative of formula (I) having anti-tumour activity, wherein formula (I) is: 1
    Type: Application
    Filed: August 7, 2003
    Publication date: March 18, 2004
    Applicant: SANKYO COMPANY, LIMITED
    Inventors: Takashi Takita, Keiichi Ohtsuka, Eiji Numagami, Susumu Harashima