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:
Mar. 11, 2014
Filed:
Apr. 25, 2011
Akihiro Ishii, Kawagoe, JP;
Hirokatsu Nagura, Kawagoe, JP;
Hideyuki Tsuruta, Kawagoe, JP;
Central Glass Company, Limited, Ube-shi, JP;
Abstract
In the presence invention, a (2R)-2-fluoro-2-C-methyl-D-ribono-γ-lactone precursor is produced in the form of a ring-opened fluorinated compound by reaction of a 1,2-diol with sulfuryl fluoride (SOF) in the presence of an organic base and, optionally, a fluoride ion source. The production method of the present invention secures less number of process steps as compared to the conventional production method (shortening of three steps: cyclic sulfurous esterification, oxidation and ring-opening fluorination to one step) and satisfies the requirements for industrial production (high yield and high reproductivity). The thus-obtained (2R)-2-fluoro-2-C-methyl-D-ribono-γ-lactone precursor is useful as an important intermediate for the synthesis of 2'-deoxy-2′-fluoro-2′-C-methylcytidine with antivirus activity.