Processes for preparing thioxanthone and derivatives thereof

Details Processes for preparing thioxanthone and derivatives thereof Processes for preparing thioxanthone and derivatives thereof

C - Chemistry, Metallurgy

07

D

C07D 335/16 (2006.01) C08F 2/50 (2006.01) G03F 7/031 (2006.01)

Patent

CA 2253272

A process for preparing thioxanthone and derivatives thereof is disclosed. In the process, an aromatic compound, such as cumene, is reacted with thiosalicylic acid (TSA) or dithiosalicylic acid (DTSA) in the presence of sulfuric acid. The reaction mixture, which includes thioxanthone or a derivative thereof, is thereafter distilled under reduced pressure to recover the thioxanthone compound.

L'invention concerne un procédé de préparation de thioxanthone et de ses dérivés. Ce procédé consiste à faire réagir un composé aromatique, tel que le cumène, avec de l'acide thiosalicylique (TSA) ou de l'acide dithiosalicylique (DTSA) en présence d'acide sulfurique. On distille ensuite le mélange réactionnel, contenant de la thioxanthone ou un de ses dérivés, sous pression limitée afin de récupérer le composé de thioxanthone.

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