The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 21, 2013
Filed:
Apr. 10, 2009
Tatsunori Sato, Hyogo, JP;
Tetsuya Kawashima, Hyogo, JP;
Toshio Miwa, Osaka, JP;
Kazutoyo Dokei, Osaka, JP;
Chikoto Fujimoto, Saitama, JP;
Tatsunori Sato, Hyogo, JP;
Tetsuya Kawashima, Hyogo, JP;
Toshio Miwa, Osaka, JP;
Kazutoyo Dokei, Osaka, JP;
Chikoto Fujimoto, Saitama, JP;
Hamari Chemicals, Ltd., Osaka, JP;
Abstract
The present invention provides a process for producing 2',3′-didehydro-3′-deoxy-4′-ethynylthymidine, which is useful as a medicine, in an efficient and industrially advantageous manner, and more specifically, provides a process for producing 2′,3′-didehydro-3′-deoxy-4′-ethynylthymidine as shown below. (wherein Rand Rindependently represent a protective group for a hydroxy group, or Rand Rtogether form a protective group for two hydroxy groups, Rand Rindependently represent a protective group for a hydroxy group, Rrepresents a protective group for a hydroxy group, Rrepresents a protective group for a hydroxy group, X represents a leaving group, and Y represents a halogen atom.)