Process for manufacturing a flavone derivative

Details Process for manufacturing a flavone derivative Process for manufacturing a flavone derivative

C - Chemistry, Metallurgy

07

H

260/233

C07H 15/26 (2006.01) C07H 17/07 (2006.01)

Patent

CA 1037032

ABSTRACT OF THE DISCLOSURE A process for manufacturing pure diosmin suitable as a therapeutic agent comprising acetylating hesperidin, observing by means of ultraviolet absorption the progress of the acetylation reaction and continuing such re- action until there disappears the band initially occurring at a wave length in the range of 264 to 280 nm and there appears in place thereof a new maximum at a wave length of about 330 nm. Thereafter the acetylation product is brominated, the obtained bromination product hydrolyzed and the obtained product after precipitation isolated, in order to obtain diosmin having a bromine content less then 0.1%.

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