Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Young-Kil Chang0
Jae-Heon Lee0
Moon-Sub Lee0
Nam-Du Kim0
Gwan-Sun Lee0
Date of Patent
April 10, 2007
0Patent Application Number
105312990
Date Filed
October 17, 2003
0Patent Primary Examiner
Patent abstract
Risperidone is prepared in a high yield by reacting 2,4-difluorophenyl(4-piperidinyl)methanone oxime hydrochloride and 3-(2-chloroethyl)-6,7,8,9-tetrahydro-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one in an aqueous alkali hydroxide solution having an alkali hydroxide concentration in the range of 20 to 40%.
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