Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
May 12, 2009
Patent Application Number
11819179
Date Filed
June 26, 2007
Patent Primary Examiner
Patent abstract
The present invention provides a method for preparing an antiulcer agent, 2-(2-pyridinylmethylsulfinyl)benzimidazoles, such as Omeprazole, Lansoprazole, Pantoprazole and Rabeprazole, which includes oxidizing an intermediate having a linkage of methylthio group (—CH2S—) to methylsulfinyl (—CH2S(O)—) in the presence of an oxidation catalyst of an alkali metal salt of tungstate at a temperature of 10-50° C.
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